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   1 /*******************************************************************
   2  * ident "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $"
   3  *
   4  * $Author: ecd $
   5  * $Date: 2001/11/11 08:13:54 $
   6  *
   7  * Copyright (c) 2000 ATecoM GmbH
   8  *
   9  * The author may be reached at ecd@atecom.com.
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  *
  16  * THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
  17  * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  19  * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  22  * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  23  * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  * You should have received a copy of the  GNU General Public License along
  28  * with this program; if not, write  to the Free Software Foundation, Inc.,
  29  * 675 Mass Ave, Cambridge, MA 02139, USA.
  30  *
  31  *******************************************************************/
  32 static char const rcsid[] =
  33 "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $";
  34
  35
  36 #include <linux/module.h>
  37 #include <linux/pci.h>
  38 #include <linux/poison.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/kernel.h>
  41 #include <linux/vmalloc.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/atmdev.h>
  44 #include <linux/atm.h>
  45 #include <linux/delay.h>
  46 #include <linux/init.h>
  47 #include <linux/bitops.h>
  48 #include <linux/wait.h>
  49 #include <linux/jiffies.h>
  50 #include <linux/mutex.h>
  51
  52 #include <asm/io.h>
  53 #include <asm/uaccess.h>
  54 #include <asm/atomic.h>
  55 #include <asm/byteorder.h>
  56
  57 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
  58 #include "suni.h"
  59 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
  60
  61
  62 #include "idt77252.h"
  63 #include "idt77252_tables.h"
  64
  65 static unsigned int vpibits = 1;
  66
  67
  68 #define ATM_IDT77252_SEND_IDLE 1
  69
  70
  71 /*
  72  * Debug HACKs.
  73  */
  74 #define DEBUG_MODULE 1
  75 #undef HAVE_EEPROM      /* does not work, yet. */
  76
  77 #ifdef CONFIG_ATM_IDT77252_DEBUG
  78 static unsigned long debug = DBG_GENERAL;
  79 #endif
  80
  81
  82 #define SAR_RX_DELAY    (SAR_CFG_RXINT_NODELAY)
  83
  84
  85 /*
  86  * SCQ Handling.
  87  */
  88 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
  89 static void free_scq(struct idt77252_dev *, struct scq_info *);
  90 static int queue_skb(struct idt77252_dev *, struct vc_map *,
  91                      struct sk_buff *, int oam);
  92 static void drain_scq(struct idt77252_dev *, struct vc_map *);
  93 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
  94 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
  95
  96 /*
  97  * FBQ Handling.
  98  */
  99 static int push_rx_skb(struct idt77252_dev *,
 100                        struct sk_buff *, int queue);
 101 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
 102 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
 103 static void recycle_rx_pool_skb(struct idt77252_dev *,
 104                                 struct rx_pool *);
 105 static void add_rx_skb(struct idt77252_dev *, int queue,
 106                        unsigned int size, unsigned int count);
 107
 108 /*
 109  * RSQ Handling.
 110  */
 111 static int init_rsq(struct idt77252_dev *);
 112 static void deinit_rsq(struct idt77252_dev *);
 113 static void idt77252_rx(struct idt77252_dev *);
 114
 115 /*
 116  * TSQ handling.
 117  */
 118 static int init_tsq(struct idt77252_dev *);
 119 static void deinit_tsq(struct idt77252_dev *);
 120 static void idt77252_tx(struct idt77252_dev *);
 121
 122
 123 /*
 124  * ATM Interface.
 125  */
 126 static void idt77252_dev_close(struct atm_dev *dev);
 127 static int idt77252_open(struct atm_vcc *vcc);
 128 static void idt77252_close(struct atm_vcc *vcc);
 129 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
 130 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
 131                              int flags);
 132 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
 133                              unsigned long addr);
 134 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
 135 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
 136                                int flags);
 137 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
 138                               char *page);
 139 static void idt77252_softint(struct work_struct *work);
 140
 141
 142 static struct atmdev_ops idt77252_ops =
 143 {
 144         .dev_close      = idt77252_dev_close,
 145         .open           = idt77252_open,
 146         .close          = idt77252_close,
 147         .send           = idt77252_send,
 148         .send_oam       = idt77252_send_oam,
 149         .phy_put        = idt77252_phy_put,
 150         .phy_get        = idt77252_phy_get,
 151         .change_qos     = idt77252_change_qos,
 152         .proc_read      = idt77252_proc_read,
 153         .owner          = THIS_MODULE
 154 };
 155
 156 static struct idt77252_dev *idt77252_chain = NULL;
 157 static unsigned int idt77252_sram_write_errors = 0;
 158
 159 /*****************************************************************************/
 160 /*                                                                           */
 161 /* I/O and Utility Bus                                                       */
 162 /*                                                                           */
 163 /*****************************************************************************/
 164
 165 static void
 166 waitfor_idle(struct idt77252_dev *card)
 167 {
 168         u32 stat;
 169
 170         stat = readl(SAR_REG_STAT);
 171         while (stat & SAR_STAT_CMDBZ)
 172                 stat = readl(SAR_REG_STAT);
 173 }
 174
 175 static u32
 176 read_sram(struct idt77252_dev *card, unsigned long addr)
 177 {
 178         unsigned long flags;
 179         u32 value;
 180
 181         spin_lock_irqsave(&card->cmd_lock, flags);
 182         writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
 183         waitfor_idle(card);
 184         value = readl(SAR_REG_DR0);
 185         spin_unlock_irqrestore(&card->cmd_lock, flags);
 186         return value;
 187 }
 188
 189 static void
 190 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
 191 {
 192         unsigned long flags;
 193
 194         if ((idt77252_sram_write_errors == 0) &&
 195             (((addr > card->tst[0] + card->tst_size - 2) &&
 196               (addr < card->tst[0] + card->tst_size)) ||
 197              ((addr > card->tst[1] + card->tst_size - 2) &&
 198               (addr < card->tst[1] + card->tst_size)))) {
 199                 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
 200                        card->name, addr, value);
 201         }
 202
 203         spin_lock_irqsave(&card->cmd_lock, flags);
 204         writel(value, SAR_REG_DR0);
 205         writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
 206         waitfor_idle(card);
 207         spin_unlock_irqrestore(&card->cmd_lock, flags);
 208 }
 209
 210 static u8
 211 read_utility(void *dev, unsigned long ubus_addr)
 212 {
 213         struct idt77252_dev *card = dev;
 214         unsigned long flags;
 215         u8 value;
 216
 217         if (!card) {
 218                 printk("Error: No such device.\n");
 219                 return -1;
 220         }
 221
 222         spin_lock_irqsave(&card->cmd_lock, flags);
 223         writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
 224         waitfor_idle(card);
 225         value = readl(SAR_REG_DR0);
 226         spin_unlock_irqrestore(&card->cmd_lock, flags);
 227         return value;
 228 }
 229
 230 static void
 231 write_utility(void *dev, unsigned long ubus_addr, u8 value)
 232 {
 233         struct idt77252_dev *card = dev;
 234         unsigned long flags;
 235
 236         if (!card) {
 237                 printk("Error: No such device.\n");
 238                 return;
 239         }
 240
 241         spin_lock_irqsave(&card->cmd_lock, flags);
 242         writel((u32) value, SAR_REG_DR0);
 243         writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
 244         waitfor_idle(card);
 245         spin_unlock_irqrestore(&card->cmd_lock, flags);
 246 }
 247
 248 #ifdef HAVE_EEPROM
 249 static u32 rdsrtab[] =
 250 {
 251         SAR_GP_EECS | SAR_GP_EESCLK,
 252         0,
 253         SAR_GP_EESCLK,                  /* 0 */
 254         0,
 255         SAR_GP_EESCLK,                  /* 0 */
 256         0,
 257         SAR_GP_EESCLK,                  /* 0 */
 258         0,
 259         SAR_GP_EESCLK,                  /* 0 */
 260         0,
 261         SAR_GP_EESCLK,                  /* 0 */
 262         SAR_GP_EEDO,
 263         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 264         0,
 265         SAR_GP_EESCLK,                  /* 0 */
 266         SAR_GP_EEDO,
 267         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 268 };
 269
 270 static u32 wrentab[] =
 271 {
 272         SAR_GP_EECS | SAR_GP_EESCLK,
 273         0,
 274         SAR_GP_EESCLK,                  /* 0 */
 275         0,
 276         SAR_GP_EESCLK,                  /* 0 */
 277         0,
 278         SAR_GP_EESCLK,                  /* 0 */
 279         0,
 280         SAR_GP_EESCLK,                  /* 0 */
 281         SAR_GP_EEDO,
 282         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 283         SAR_GP_EEDO,
 284         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 285         0,
 286         SAR_GP_EESCLK,                  /* 0 */
 287         0,
 288         SAR_GP_EESCLK                   /* 0 */
 289 };
 290
 291 static u32 rdtab[] =
 292 {
 293         SAR_GP_EECS | SAR_GP_EESCLK,
 294         0,
 295         SAR_GP_EESCLK,                  /* 0 */
 296         0,
 297         SAR_GP_EESCLK,                  /* 0 */
 298         0,
 299         SAR_GP_EESCLK,                  /* 0 */
 300         0,
 301         SAR_GP_EESCLK,                  /* 0 */
 302         0,
 303         SAR_GP_EESCLK,                  /* 0 */
 304         0,
 305         SAR_GP_EESCLK,                  /* 0 */
 306         SAR_GP_EEDO,
 307         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 308         SAR_GP_EEDO,
 309         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 310 };
 311
 312 static u32 wrtab[] =
 313 {
 314         SAR_GP_EECS | SAR_GP_EESCLK,
 315         0,
 316         SAR_GP_EESCLK,                  /* 0 */
 317         0,
 318         SAR_GP_EESCLK,                  /* 0 */
 319         0,
 320         SAR_GP_EESCLK,                  /* 0 */
 321         0,
 322         SAR_GP_EESCLK,                  /* 0 */
 323         0,
 324         SAR_GP_EESCLK,                  /* 0 */
 325         0,
 326         SAR_GP_EESCLK,                  /* 0 */
 327         SAR_GP_EEDO,
 328         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 329         0,
 330         SAR_GP_EESCLK                   /* 0 */
 331 };
 332
 333 static u32 clktab[] =
 334 {
 335         0,
 336         SAR_GP_EESCLK,
 337         0,
 338         SAR_GP_EESCLK,
 339         0,
 340         SAR_GP_EESCLK,
 341         0,
 342         SAR_GP_EESCLK,
 343         0,
 344         SAR_GP_EESCLK,
 345         0,
 346         SAR_GP_EESCLK,
 347         0,
 348         SAR_GP_EESCLK,
 349         0,
 350         SAR_GP_EESCLK,
 351         0
 352 };
 353
 354 static u32
 355 idt77252_read_gp(struct idt77252_dev *card)
 356 {
 357         u32 gp;
 358
 359         gp = readl(SAR_REG_GP);
 360 #if 0
 361         printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
 362 #endif
 363         return gp;
 364 }
 365
 366 static void
 367 idt77252_write_gp(struct idt77252_dev *card, u32 value)
 368 {
 369         unsigned long flags;
 370
 371 #if 0
 372         printk("WR: %s %s %s\n", value & SAR_GP_EECS ? "   " : "/CS",
 373                value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
 374                value & SAR_GP_EEDO   ? "1" : "0");
 375 #endif
 376
 377         spin_lock_irqsave(&card->cmd_lock, flags);
 378         waitfor_idle(card);
 379         writel(value, SAR_REG_GP);
 380         spin_unlock_irqrestore(&card->cmd_lock, flags);
 381 }
 382
 383 static u8
 384 idt77252_eeprom_read_status(struct idt77252_dev *card)
 385 {
 386         u8 byte;
 387         u32 gp;
 388         int i, j;
 389
 390         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 391
 392         for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
 393                 idt77252_write_gp(card, gp | rdsrtab[i]);
 394                 udelay(5);
 395         }
 396         idt77252_write_gp(card, gp | SAR_GP_EECS);
 397         udelay(5);
 398
 399         byte = 0;
 400         for (i = 0, j = 0; i < 8; i++) {
 401                 byte <<= 1;
 402
 403                 idt77252_write_gp(card, gp | clktab[j++]);
 404                 udelay(5);
 405
 406                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 407
 408                 idt77252_write_gp(card, gp | clktab[j++]);
 409                 udelay(5);
 410         }
 411         idt77252_write_gp(card, gp | SAR_GP_EECS);
 412         udelay(5);
 413
 414         return byte;
 415 }
 416
 417 static u8
 418 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
 419 {
 420         u8 byte;
 421         u32 gp;
 422         int i, j;
 423
 424         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 425
 426         for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
 427                 idt77252_write_gp(card, gp | rdtab[i]);
 428                 udelay(5);
 429         }
 430         idt77252_write_gp(card, gp | SAR_GP_EECS);
 431         udelay(5);
 432
 433         for (i = 0, j = 0; i < 8; i++) {
 434                 idt77252_write_gp(card, gp | clktab[j++] |
 435                                         (offset & 1 ? SAR_GP_EEDO : 0));
 436                 udelay(5);
 437
 438                 idt77252_write_gp(card, gp | clktab[j++] |
 439                                         (offset & 1 ? SAR_GP_EEDO : 0));
 440                 udelay(5);
 441
 442                 offset >>= 1;
 443         }
 444         idt77252_write_gp(card, gp | SAR_GP_EECS);
 445         udelay(5);
 446
 447         byte = 0;
 448         for (i = 0, j = 0; i < 8; i++) {
 449                 byte <<= 1;
 450
 451                 idt77252_write_gp(card, gp | clktab[j++]);
 452                 udelay(5);
 453
 454                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 455
 456                 idt77252_write_gp(card, gp | clktab[j++]);
 457                 udelay(5);
 458         }
 459         idt77252_write_gp(card, gp | SAR_GP_EECS);
 460         udelay(5);
 461
 462         return byte;
 463 }
 464
 465 static void
 466 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
 467 {
 468         u32 gp;
 469         int i, j;
 470
 471         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 472
 473         for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
 474                 idt77252_write_gp(card, gp | wrentab[i]);
 475                 udelay(5);
 476         }
 477         idt77252_write_gp(card, gp | SAR_GP_EECS);
 478         udelay(5);
 479
 480         for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
 481                 idt77252_write_gp(card, gp | wrtab[i]);
 482                 udelay(5);
 483         }
 484         idt77252_write_gp(card, gp | SAR_GP_EECS);
 485         udelay(5);
 486
 487         for (i = 0, j = 0; i < 8; i++) {
 488                 idt77252_write_gp(card, gp | clktab[j++] |
 489                                         (offset & 1 ? SAR_GP_EEDO : 0));
 490                 udelay(5);
 491
 492                 idt77252_write_gp(card, gp | clktab[j++] |
 493                                         (offset & 1 ? SAR_GP_EEDO : 0));
 494                 udelay(5);
 495
 496                 offset >>= 1;
 497         }
 498         idt77252_write_gp(card, gp | SAR_GP_EECS);
 499         udelay(5);
 500
 501         for (i = 0, j = 0; i < 8; i++) {
 502                 idt77252_write_gp(card, gp | clktab[j++] |
 503                                         (data & 1 ? SAR_GP_EEDO : 0));
 504                 udelay(5);
 505
 506                 idt77252_write_gp(card, gp | clktab[j++] |
 507                                         (data & 1 ? SAR_GP_EEDO : 0));
 508                 udelay(5);
 509
 510                 data >>= 1;
 511         }
 512         idt77252_write_gp(card, gp | SAR_GP_EECS);
 513         udelay(5);
 514 }
 515
 516 static void
 517 idt77252_eeprom_init(struct idt77252_dev *card)
 518 {
 519         u32 gp;
 520
 521         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 522
 523         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 524         udelay(5);
 525         idt77252_write_gp(card, gp | SAR_GP_EECS);
 526         udelay(5);
 527         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 528         udelay(5);
 529         idt77252_write_gp(card, gp | SAR_GP_EECS);
 530         udelay(5);
 531 }
 532 #endif /* HAVE_EEPROM */
 533
 534
 535 #ifdef CONFIG_ATM_IDT77252_DEBUG
 536 static void
 537 dump_tct(struct idt77252_dev *card, int index)
 538 {
 539         unsigned long tct;
 540         int i;
 541
 542         tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
 543
 544         printk("%s: TCT %x:", card->name, index);
 545         for (i = 0; i < 8; i++) {
 546                 printk(" %08x", read_sram(card, tct + i));
 547         }
 548         printk("\n");
 549 }
 550
 551 static void
 552 idt77252_tx_dump(struct idt77252_dev *card)
 553 {
 554         struct atm_vcc *vcc;
 555         struct vc_map *vc;
 556         int i;
 557
 558         printk("%s\n", __FUNCTION__);
 559         for (i = 0; i < card->tct_size; i++) {
 560                 vc = card->vcs[i];
 561                 if (!vc)
 562                         continue;
 563
 564                 vcc = NULL;
 565                 if (vc->rx_vcc)
 566                         vcc = vc->rx_vcc;
 567                 else if (vc->tx_vcc)
 568                         vcc = vc->tx_vcc;
 569
 570                 if (!vcc)
 571                         continue;
 572
 573                 printk("%s: Connection %d:\n", card->name, vc->index);
 574                 dump_tct(card, vc->index);
 575         }
 576 }
 577 #endif
 578
 579
 580 /*****************************************************************************/
 581 /*                                                                           */
 582 /* SCQ Handling                                                              */
 583 /*                                                                           */
 584 /*****************************************************************************/
 585
 586 static int
 587 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
 588 {
 589         struct sb_pool *pool = &card->sbpool[queue];
 590         int index;
 591
 592         index = pool->index;
 593         while (pool->skb[index]) {
 594                 index = (index + 1) & FBQ_MASK;
 595                 if (index == pool->index)
 596                         return -ENOBUFS;
 597         }
 598
 599         pool->skb[index] = skb;
 600         IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
 601
 602         pool->index = (index + 1) & FBQ_MASK;
 603         return 0;
 604 }
 605
 606 static void
 607 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
 608 {
 609         unsigned int queue, index;
 610         u32 handle;
 611
 612         handle = IDT77252_PRV_POOL(skb);
 613
 614         queue = POOL_QUEUE(handle);
 615         if (queue > 3)
 616                 return;
 617
 618         index = POOL_INDEX(handle);
 619         if (index > FBQ_SIZE - 1)
 620                 return;
 621
 622         card->sbpool[queue].skb[index] = NULL;
 623 }
 624
 625 static struct sk_buff *
 626 sb_pool_skb(struct idt77252_dev *card, u32 handle)
 627 {
 628         unsigned int queue, index;
 629
 630         queue = POOL_QUEUE(handle);
 631         if (queue > 3)
 632                 return NULL;
 633
 634         index = POOL_INDEX(handle);
 635         if (index > FBQ_SIZE - 1)
 636                 return NULL;
 637
 638         return card->sbpool[queue].skb[index];
 639 }
 640
 641 static struct scq_info *
 642 alloc_scq(struct idt77252_dev *card, int class)
 643 {
 644         struct scq_info *scq;
 645
 646         scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
 647         if (!scq)
 648                 return NULL;
 649         scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
 650                                          &scq->paddr);
 651         if (scq->base == NULL) {
 652                 kfree(scq);
 653                 return NULL;
 654         }
 655         memset(scq->base, 0, SCQ_SIZE);
 656
 657         scq->next = scq->base;
 658         scq->last = scq->base + (SCQ_ENTRIES - 1);
 659         atomic_set(&scq->used, 0);
 660
 661         spin_lock_init(&scq->lock);
 662         spin_lock_init(&scq->skblock);
 663
 664         skb_queue_head_init(&scq->transmit);
 665         skb_queue_head_init(&scq->pending);
 666
 667         TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
 668                  scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
 669
 670         return scq;
 671 }
 672
 673 static void
 674 free_scq(struct idt77252_dev *card, struct scq_info *scq)
 675 {
 676         struct sk_buff *skb;
 677         struct atm_vcc *vcc;
 678
 679         pci_free_consistent(card->pcidev, SCQ_SIZE,
 680                             scq->base, scq->paddr);
 681
 682         while ((skb = skb_dequeue(&scq->transmit))) {
 683                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 684                                  skb->len, PCI_DMA_TODEVICE);
 685
 686                 vcc = ATM_SKB(skb)->vcc;
 687                 if (vcc->pop)
 688                         vcc->pop(vcc, skb);
 689                 else
 690                         dev_kfree_skb(skb);
 691         }
 692
 693         while ((skb = skb_dequeue(&scq->pending))) {
 694                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 695                                  skb->len, PCI_DMA_TODEVICE);
 696
 697                 vcc = ATM_SKB(skb)->vcc;
 698                 if (vcc->pop)
 699                         vcc->pop(vcc, skb);
 700                 else
 701                         dev_kfree_skb(skb);
 702         }
 703
 704         kfree(scq);
 705 }
 706
 707
 708 static int
 709 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
 710 {
 711         struct scq_info *scq = vc->scq;
 712         unsigned long flags;
 713         struct scqe *tbd;
 714         int entries;
 715
 716         TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
 717
 718         atomic_inc(&scq->used);
 719         entries = atomic_read(&scq->used);
 720         if (entries > (SCQ_ENTRIES - 1)) {
 721                 atomic_dec(&scq->used);
 722                 goto out;
 723         }
 724
 725         skb_queue_tail(&scq->transmit, skb);
 726
 727         spin_lock_irqsave(&vc->lock, flags);
 728         if (vc->estimator) {
 729                 struct atm_vcc *vcc = vc->tx_vcc;
 730                 struct sock *sk = sk_atm(vcc);
 731
 732                 vc->estimator->cells += (skb->len + 47) / 48;
 733                 if (atomic_read(&sk->sk_wmem_alloc) >
 734                     (sk->sk_sndbuf >> 1)) {
 735                         u32 cps = vc->estimator->maxcps;
 736
 737                         vc->estimator->cps = cps;
 738                         vc->estimator->avcps = cps << 5;
 739                         if (vc->lacr < vc->init_er) {
 740                                 vc->lacr = vc->init_er;
 741                                 writel(TCMDQ_LACR | (vc->lacr << 16) |
 742                                        vc->index, SAR_REG_TCMDQ);
 743                         }
 744                 }
 745         }
 746         spin_unlock_irqrestore(&vc->lock, flags);
 747
 748         tbd = &IDT77252_PRV_TBD(skb);
 749
 750         spin_lock_irqsave(&scq->lock, flags);
 751         scq->next->word_1 = cpu_to_le32(tbd->word_1 |
 752                                         SAR_TBD_TSIF | SAR_TBD_GTSI);
 753         scq->next->word_2 = cpu_to_le32(tbd->word_2);
 754         scq->next->word_3 = cpu_to_le32(tbd->word_3);
 755         scq->next->word_4 = cpu_to_le32(tbd->word_4);
 756
 757         if (scq->next == scq->last)
 758                 scq->next = scq->base;
 759         else
 760                 scq->next++;
 761
 762         write_sram(card, scq->scd,
 763                    scq->paddr +
 764                    (u32)((unsigned long)scq->next - (unsigned long)scq->base));
 765         spin_unlock_irqrestore(&scq->lock, flags);
 766
 767         scq->trans_start = jiffies;
 768
 769         if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
 770                 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
 771                        SAR_REG_TCMDQ);
 772         }
 773
 774         TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
 775
 776         XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
 777                 card->name, atomic_read(&scq->used),
 778                 read_sram(card, scq->scd + 1), scq->next);
 779
 780         return 0;
 781
 782 out:
 783         if (time_after(jiffies, scq->trans_start + HZ)) {
 784                 printk("%s: Error pushing TBD for %d.%d\n",
 785                        card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
 786 #ifdef CONFIG_ATM_IDT77252_DEBUG
 787                 idt77252_tx_dump(card);
 788 #endif
 789                 scq->trans_start = jiffies;
 790         }
 791
 792         return -ENOBUFS;
 793 }
 794
 795
 796 static void
 797 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
 798 {
 799         struct scq_info *scq = vc->scq;
 800         struct sk_buff *skb;
 801         struct atm_vcc *vcc;
 802
 803         TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
 804                  card->name, atomic_read(&scq->used), scq->next);
 805
 806         skb = skb_dequeue(&scq->transmit);
 807         if (skb) {
 808                 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
 809
 810                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 811                                  skb->len, PCI_DMA_TODEVICE);
 812
 813                 vcc = ATM_SKB(skb)->vcc;
 814
 815                 if (vcc->pop)
 816                         vcc->pop(vcc, skb);
 817                 else
 818                         dev_kfree_skb(skb);
 819
 820                 atomic_inc(&vcc->stats->tx);
 821         }
 822
 823         atomic_dec(&scq->used);
 824
 825         spin_lock(&scq->skblock);
 826         while ((skb = skb_dequeue(&scq->pending))) {
 827                 if (push_on_scq(card, vc, skb)) {
 828                         skb_queue_head(&vc->scq->pending, skb);
 829                         break;
 830                 }
 831         }
 832         spin_unlock(&scq->skblock);
 833 }
 834
 835 static int
 836 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
 837           struct sk_buff *skb, int oam)
 838 {
 839         struct atm_vcc *vcc;
 840         struct scqe *tbd;
 841         unsigned long flags;
 842         int error;
 843         int aal;
 844
 845         if (skb->len == 0) {
 846                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
 847                 return -EINVAL;
 848         }
 849
 850         TXPRINTK("%s: Sending %d bytes of data.\n",
 851                  card->name, skb->len);
 852
 853         tbd = &IDT77252_PRV_TBD(skb);
 854         vcc = ATM_SKB(skb)->vcc;
 855
 856         IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
 857                                                  skb->len, PCI_DMA_TODEVICE);
 858
 859         error = -EINVAL;
 860
 861         if (oam) {
 862                 if (skb->len != 52)
 863                         goto errout;
 864
 865                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
 866                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 867                 tbd->word_3 = 0x00000000;
 868                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 869                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 870
 871                 if (test_bit(VCF_RSV, &vc->flags))
 872                         vc = card->vcs[0];
 873
 874                 goto done;
 875         }
 876
 877         if (test_bit(VCF_RSV, &vc->flags)) {
 878                 printk("%s: Trying to transmit on reserved VC\n", card->name);
 879                 goto errout;
 880         }
 881
 882         aal = vcc->qos.aal;
 883
 884         switch (aal) {
 885         case ATM_AAL0:
 886         case ATM_AAL34:
 887                 if (skb->len > 52)
 888                         goto errout;
 889
 890                 if (aal == ATM_AAL0)
 891                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
 892                                       ATM_CELL_PAYLOAD;
 893                 else
 894                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
 895                                       ATM_CELL_PAYLOAD;
 896
 897                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 898                 tbd->word_3 = 0x00000000;
 899                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 900                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 901                 break;
 902
 903         case ATM_AAL5:
 904                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
 905                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
 906                 tbd->word_3 = skb->len;
 907                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
 908                               (vcc->vci << SAR_TBD_VCI_SHIFT);
 909                 break;
 910
 911         case ATM_AAL1:
 912         case ATM_AAL2:
 913         default:
 914                 printk("%s: Traffic type not supported.\n", card->name);
 915                 error = -EPROTONOSUPPORT;
 916                 goto errout;
 917         }
 918
 919 done:
 920         spin_lock_irqsave(&vc->scq->skblock, flags);
 921         skb_queue_tail(&vc->scq->pending, skb);
 922
 923         while ((skb = skb_dequeue(&vc->scq->pending))) {
 924                 if (push_on_scq(card, vc, skb)) {
 925                         skb_queue_head(&vc->scq->pending, skb);
 926                         break;
 927                 }
 928         }
 929         spin_unlock_irqrestore(&vc->scq->skblock, flags);
 930
 931         return 0;
 932
 933 errout:
 934         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 935                          skb->len, PCI_DMA_TODEVICE);
 936         return error;
 937 }
 938
 939 static unsigned long
 940 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
 941 {
 942         int i;
 943
 944         for (i = 0; i < card->scd_size; i++) {
 945                 if (!card->scd2vc[i]) {
 946                         card->scd2vc[i] = vc;
 947                         vc->scd_index = i;
 948                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
 949                 }
 950         }
 951         return 0;
 952 }
 953
 954 static void
 955 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 956 {
 957         write_sram(card, scq->scd, scq->paddr);
 958         write_sram(card, scq->scd + 1, 0x00000000);
 959         write_sram(card, scq->scd + 2, 0xffffffff);
 960         write_sram(card, scq->scd + 3, 0x00000000);
 961 }
 962
 963 static void
 964 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 965 {
 966         return;
 967 }
 968
 969 /*****************************************************************************/
 970 /*                                                                           */
 971 /* RSQ Handling                                                              */
 972 /*                                                                           */
 973 /*****************************************************************************/
 974
 975 static int
 976 init_rsq(struct idt77252_dev *card)
 977 {
 978         struct rsq_entry *rsqe;
 979
 980         card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
 981                                               &card->rsq.paddr);
 982         if (card->rsq.base == NULL) {
 983                 printk("%s: can't allocate RSQ.\n", card->name);
 984                 return -1;
 985         }
 986         memset(card->rsq.base, 0, RSQSIZE);
 987
 988         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
 989         card->rsq.next = card->rsq.last;
 990         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
 991                 rsqe->word_4 = 0;
 992
 993         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
 994                SAR_REG_RSQH);
 995         writel(card->rsq.paddr, SAR_REG_RSQB);
 996
 997         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
 998                 (unsigned long) card->rsq.base,
 999                 readl(SAR_REG_RSQB));
1000         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
1001                 card->name,
1002                 readl(SAR_REG_RSQH),
1003                 readl(SAR_REG_RSQB),
1004                 readl(SAR_REG_RSQT));
1005
1006         return 0;
1007 }
1008
1009 static void
1010 deinit_rsq(struct idt77252_dev *card)
1011 {
1012         pci_free_consistent(card->pcidev, RSQSIZE,
1013                             card->rsq.base, card->rsq.paddr);
1014 }
1015
1016 static void
1017 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1018 {
1019         struct atm_vcc *vcc;
1020         struct sk_buff *skb;
1021         struct rx_pool *rpp;
1022         struct vc_map *vc;
1023         u32 header, vpi, vci;
1024         u32 stat;
1025         int i;
1026
1027         stat = le32_to_cpu(rsqe->word_4);
1028
1029         if (stat & SAR_RSQE_IDLE) {
1030                 RXPRINTK("%s: message about inactive connection.\n",
1031                          card->name);
1032                 return;
1033         }
1034
1035         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1036         if (skb == NULL) {
1037                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1038                        card->name, __FUNCTION__,
1039                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1040                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1041                 return;
1042         }
1043
1044         header = le32_to_cpu(rsqe->word_1);
1045         vpi = (header >> 16) & 0x00ff;
1046         vci = (header >>  0) & 0xffff;
1047
1048         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1049                  card->name, vpi, vci, skb, skb->data);
1050
1051         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1052                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1053                        card->name, vpi, vci);
1054                 recycle_rx_skb(card, skb);
1055                 return;
1056         }
1057
1058         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1059         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1060                 printk("%s: SDU received on non RX vc %u.%u\n",
1061                        card->name, vpi, vci);
1062                 recycle_rx_skb(card, skb);
1063                 return;
1064         }
1065
1066         vcc = vc->rx_vcc;
1067
1068         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1069                                     skb_end_pointer(skb) - skb->data,
1070                                     PCI_DMA_FROMDEVICE);
1071
1072         if ((vcc->qos.aal == ATM_AAL0) ||
1073             (vcc->qos.aal == ATM_AAL34)) {
1074                 struct sk_buff *sb;
1075                 unsigned char *cell;
1076                 u32 aal0;
1077
1078                 cell = skb->data;
1079                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1080                         if ((sb = dev_alloc_skb(64)) == NULL) {
1081                                 printk("%s: Can't allocate buffers for aal0.\n",
1082                                        card->name);
1083                                 atomic_add(i, &vcc->stats->rx_drop);
1084                                 break;
1085                         }
1086                         if (!atm_charge(vcc, sb->truesize)) {
1087                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1088                                          card->name);
1089                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1090                                 dev_kfree_skb(sb);
1091                                 break;
1092                         }
1093                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1094                                (vci << ATM_HDR_VCI_SHIFT);
1095                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1096                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1097
1098                         *((u32 *) sb->data) = aal0;
1099                         skb_put(sb, sizeof(u32));
1100                         memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1101                                cell, ATM_CELL_PAYLOAD);
1102
1103                         ATM_SKB(sb)->vcc = vcc;
1104                         __net_timestamp(sb);
1105                         vcc->push(vcc, sb);
1106                         atomic_inc(&vcc->stats->rx);
1107
1108                         cell += ATM_CELL_PAYLOAD;
1109                 }
1110
1111                 recycle_rx_skb(card, skb);
1112                 return;
1113         }
1114         if (vcc->qos.aal != ATM_AAL5) {
1115                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1116                        card->name, vcc->qos.aal);
1117                 recycle_rx_skb(card, skb);
1118                 return;
1119         }
1120         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1121
1122         rpp = &vc->rcv.rx_pool;
1123
1124         rpp->len += skb->len;
1125         if (!rpp->count++)
1126                 rpp->first = skb;
1127         *rpp->last = skb;
1128         rpp->last = &skb->next;
1129
1130         if (stat & SAR_RSQE_EPDU) {
1131                 unsigned char *l1l2;
1132                 unsigned int len;
1133
1134                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1135
1136                 len = (l1l2[0] << 8) | l1l2[1];
1137                 len = len ? len : 0x10000;
1138
1139                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1140
1141                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1142                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1143                                  "(CDC: %08x)\n",
1144                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1145                         recycle_rx_pool_skb(card, rpp);
1146                         atomic_inc(&vcc->stats->rx_err);
1147                         return;
1148                 }
1149                 if (stat & SAR_RSQE_CRC) {
1150                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1151                         recycle_rx_pool_skb(card, rpp);
1152                         atomic_inc(&vcc->stats->rx_err);
1153                         return;
1154                 }
1155                 if (rpp->count > 1) {
1156                         struct sk_buff *sb;
1157
1158                         skb = dev_alloc_skb(rpp->len);
1159                         if (!skb) {
1160                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1161                                          card->name);
1162                                 recycle_rx_pool_skb(card, rpp);
1163                                 atomic_inc(&vcc->stats->rx_err);
1164                                 return;
1165                         }
1166                         if (!atm_charge(vcc, skb->truesize)) {
1167                                 recycle_rx_pool_skb(card, rpp);
1168                                 dev_kfree_skb(skb);
1169                                 return;
1170                         }
1171                         sb = rpp->first;
1172                         for (i = 0; i < rpp->count; i++) {
1173                                 memcpy(skb_put(skb, sb->len),
1174                                        sb->data, sb->len);
1175                                 sb = sb->next;
1176                         }
1177
1178                         recycle_rx_pool_skb(card, rpp);
1179
1180                         skb_trim(skb, len);
1181                         ATM_SKB(skb)->vcc = vcc;
1182                         __net_timestamp(skb);
1183
1184                         vcc->push(vcc, skb);
1185                         atomic_inc(&vcc->stats->rx);
1186
1187                         return;
1188                 }
1189
1190                 skb->next = NULL;
1191                 flush_rx_pool(card, rpp);
1192
1193                 if (!atm_charge(vcc, skb->truesize)) {
1194                         recycle_rx_skb(card, skb);
1195                         return;
1196                 }
1197
1198                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1199                                  skb_end_pointer(skb) - skb->data,
1200                                  PCI_DMA_FROMDEVICE);
1201                 sb_pool_remove(card, skb);
1202
1203                 skb_trim(skb, len);
1204                 ATM_SKB(skb)->vcc = vcc;
1205                 __net_timestamp(skb);
1206
1207                 vcc->push(vcc, skb);
1208                 atomic_inc(&vcc->stats->rx);
1209
1210                 if (skb->truesize > SAR_FB_SIZE_3)
1211                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1212                 else if (skb->truesize > SAR_FB_SIZE_2)
1213                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1214                 else if (skb->truesize > SAR_FB_SIZE_1)
1215                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1216                 else
1217                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1218                 return;
1219         }
1220 }
1221
1222 static void
1223 idt77252_rx(struct idt77252_dev *card)
1224 {
1225         struct rsq_entry *rsqe;
1226
1227         if (card->rsq.next == card->rsq.last)
1228                 rsqe = card->rsq.base;
1229         else
1230                 rsqe = card->rsq.next + 1;
1231
1232         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1233                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1234                 return;
1235         }
1236
1237         do {
1238                 dequeue_rx(card, rsqe);
1239                 rsqe->word_4 = 0;
1240                 card->rsq.next = rsqe;
1241                 if (card->rsq.next == card->rsq.last)
1242                         rsqe = card->rsq.base;
1243                 else
1244                         rsqe = card->rsq.next + 1;
1245         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1246
1247         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1248                SAR_REG_RSQH);
1249 }
1250
1251 static void
1252 idt77252_rx_raw(struct idt77252_dev *card)
1253 {
1254         struct sk_buff  *queue;
1255         u32             head, tail;
1256         struct atm_vcc  *vcc;
1257         struct vc_map   *vc;
1258         struct sk_buff  *sb;
1259
1260         if (card->raw_cell_head == NULL) {
1261                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1262                 card->raw_cell_head = sb_pool_skb(card, handle);
1263         }
1264
1265         queue = card->raw_cell_head;
1266         if (!queue)
1267                 return;
1268
1269         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1270         tail = readl(SAR_REG_RAWCT);
1271
1272         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1273                                     skb_end_pointer(queue) - queue->head - 16,
1274                                     PCI_DMA_FROMDEVICE);
1275
1276         while (head != tail) {
1277                 unsigned int vpi, vci, pti;
1278                 u32 header;
1279
1280                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1281
1282                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1283                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1284                 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1285
1286 #ifdef CONFIG_ATM_IDT77252_DEBUG
1287                 if (debug & DBG_RAW_CELL) {
1288                         int i;
1289
1290                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1291                                card->name, (header >> 28) & 0x000f,
1292                                (header >> 20) & 0x00ff,
1293                                (header >>  4) & 0xffff,
1294                                (header >>  1) & 0x0007,
1295                                (header >>  0) & 0x0001);
1296                         for (i = 16; i < 64; i++)
1297                                 printk(" %02x", queue->data[i]);
1298                         printk("\n");
1299                 }
1300 #endif
1301
1302                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1303                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1304                                 card->name, vpi, vci);
1305                         goto drop;
1306                 }
1307
1308                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1309                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1310                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1311                                 card->name, vpi, vci);
1312                         goto drop;
1313                 }
1314
1315                 vcc = vc->rx_vcc;
1316
1317                 if (vcc->qos.aal != ATM_AAL0) {
1318                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1319                                 card->name, vpi, vci);
1320                         atomic_inc(&vcc->stats->rx_drop);
1321                         goto drop;
1322                 }
1323
1324                 if ((sb = dev_alloc_skb(64)) == NULL) {
1325                         printk("%s: Can't allocate buffers for AAL0.\n",
1326                                card->name);
1327                         atomic_inc(&vcc->stats->rx_err);
1328                         goto drop;
1329                 }
1330
1331                 if (!atm_charge(vcc, sb->truesize)) {
1332                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1333                                  card->name);
1334                         dev_kfree_skb(sb);
1335                         goto drop;
1336                 }
1337
1338                 *((u32 *) sb->data) = header;
1339                 skb_put(sb, sizeof(u32));
1340                 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1341                        ATM_CELL_PAYLOAD);
1342
1343                 ATM_SKB(sb)->vcc = vcc;
1344                 __net_timestamp(sb);
1345                 vcc->push(vcc, sb);
1346                 atomic_inc(&vcc->stats->rx);
1347
1348 drop:
1349                 skb_pull(queue, 64);
1350
1351                 head = IDT77252_PRV_PADDR(queue)
1352                                         + (queue->data - queue->head - 16);
1353
1354                 if (queue->len < 128) {
1355                         struct sk_buff *next;
1356                         u32 handle;
1357
1358                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1359                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1360
1361                         next = sb_pool_skb(card, handle);
1362                         recycle_rx_skb(card, queue);
1363
1364                         if (next) {
1365                                 card->raw_cell_head = next;
1366                                 queue = card->raw_cell_head;
1367                                 pci_dma_sync_single_for_cpu(card->pcidev,
1368                                                             IDT77252_PRV_PADDR(queue),
1369                                                             (skb_end_pointer(queue) -
1370                                                              queue->data),
1371                                                             PCI_DMA_FROMDEVICE);
1372                         } else {
1373                                 card->raw_cell_head = NULL;
1374                                 printk("%s: raw cell queue overrun\n",
1375                                        card->name);
1376                                 break;
1377                         }
1378                 }
1379         }
1380 }
1381
1382
1383 /*****************************************************************************/
1384 /*                                                                           */
1385 /* TSQ Handling                                                              */
1386 /*                                                                           */
1387 /*****************************************************************************/
1388
1389 static int
1390 init_tsq(struct idt77252_dev *card)
1391 {
1392         struct tsq_entry *tsqe;
1393
1394         card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1395                                               &card->tsq.paddr);
1396         if (card->tsq.base == NULL) {
1397                 printk("%s: can't allocate TSQ.\n", card->name);
1398                 return -1;
1399         }
1400         memset(card->tsq.base, 0, TSQSIZE);
1401
1402         card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1403         card->tsq.next = card->tsq.last;
1404         for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1405                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1406
1407         writel(card->tsq.paddr, SAR_REG_TSQB);
1408         writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1409                SAR_REG_TSQH);
1410
1411         return 0;
1412 }
1413
1414 static void
1415 deinit_tsq(struct idt77252_dev *card)
1416 {
1417         pci_free_consistent(card->pcidev, TSQSIZE,
1418                             card->tsq.base, card->tsq.paddr);
1419 }
1420
1421 static void
1422 idt77252_tx(struct idt77252_dev *card)
1423 {
1424         struct tsq_entry *tsqe;
1425         unsigned int vpi, vci;
1426         struct vc_map *vc;
1427         u32 conn, stat;
1428
1429         if (card->tsq.next == card->tsq.last)
1430                 tsqe = card->tsq.base;
1431         else
1432                 tsqe = card->tsq.next + 1;
1433
1434         TXPRINTK("idt77252_tx: tsq  %p: base %p, next %p, last %p\n", tsqe,
1435                  card->tsq.base, card->tsq.next, card->tsq.last);
1436         TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1437                  readl(SAR_REG_TSQB),
1438                  readl(SAR_REG_TSQT),
1439                  readl(SAR_REG_TSQH));
1440
1441         stat = le32_to_cpu(tsqe->word_2);
1442
1443         if (stat & SAR_TSQE_INVALID)
1444                 return;
1445
1446         do {
1447                 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1448                          le32_to_cpu(tsqe->word_1),
1449                          le32_to_cpu(tsqe->word_2));
1450
1451                 switch (stat & SAR_TSQE_TYPE) {
1452                 case SAR_TSQE_TYPE_TIMER:
1453                         TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1454                         break;
1455
1456                 case SAR_TSQE_TYPE_IDLE:
1457
1458                         conn = le32_to_cpu(tsqe->word_1);
1459
1460                         if (SAR_TSQE_TAG(stat) == 0x10) {
1461 #ifdef  NOTDEF
1462                                 printk("%s: Connection %d halted.\n",
1463                                        card->name,
1464                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1465 #endif
1466                                 break;
1467                         }
1468
1469                         vc = card->vcs[conn & 0x1fff];
1470                         if (!vc) {
1471                                 printk("%s: could not find VC from conn %d\n",
1472                                        card->name, conn & 0x1fff);
1473                                 break;
1474                         }
1475
1476                         printk("%s: Connection %d IDLE.\n",
1477                                card->name, vc->index);
1478
1479                         set_bit(VCF_IDLE, &vc->flags);
1480                         break;
1481
1482                 case SAR_TSQE_TYPE_TSR:
1483
1484                         conn = le32_to_cpu(tsqe->word_1);
1485
1486                         vc = card->vcs[conn & 0x1fff];
1487                         if (!vc) {
1488                                 printk("%s: no VC at index %d\n",
1489                                        card->name,
1490                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1491                                 break;
1492                         }
1493
1494                         drain_scq(card, vc);
1495                         break;
1496
1497                 case SAR_TSQE_TYPE_TBD_COMP:
1498
1499                         conn = le32_to_cpu(tsqe->word_1);
1500
1501                         vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1502                         vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1503
1504                         if (vpi >= (1 << card->vpibits) ||
1505                             vci >= (1 << card->vcibits)) {
1506                                 printk("%s: TBD complete: "
1507                                        "out of range VPI.VCI %u.%u\n",
1508                                        card->name, vpi, vci);
1509                                 break;
1510                         }
1511
1512                         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1513                         if (!vc) {
1514                                 printk("%s: TBD complete: "
1515                                        "no VC at VPI.VCI %u.%u\n",
1516                                        card->name, vpi, vci);
1517                                 break;
1518                         }
1519
1520                         drain_scq(card, vc);
1521                         break;
1522                 }
1523
1524                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1525
1526                 card->tsq.next = tsqe;
1527                 if (card->tsq.next == card->tsq.last)
1528                         tsqe = card->tsq.base;
1529                 else
1530                         tsqe = card->tsq.next + 1;
1531
1532                 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1533                          card->tsq.base, card->tsq.next, card->tsq.last);
1534
1535                 stat = le32_to_cpu(tsqe->word_2);
1536
1537         } while (!(stat & SAR_TSQE_INVALID));
1538
1539         writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1540                SAR_REG_TSQH);
1541
1542         XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1543                 card->index, readl(SAR_REG_TSQH),
1544                 readl(SAR_REG_TSQT), card->tsq.next);
1545 }
1546
1547
1548 static void
1549 tst_timer(unsigned long data)
1550 {
1551         struct idt77252_dev *card = (struct idt77252_dev *)data;
1552         unsigned long base, idle, jump;
1553         unsigned long flags;
1554         u32 pc;
1555         int e;
1556
1557         spin_lock_irqsave(&card->tst_lock, flags);
1558
1559         base = card->tst[card->tst_index];
1560         idle = card->tst[card->tst_index ^ 1];
1561
1562         if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1563                 jump = base + card->tst_size - 2;
1564
1565                 pc = readl(SAR_REG_NOW) >> 2;
1566                 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1567                         mod_timer(&card->tst_timer, jiffies + 1);
1568                         goto out;
1569                 }
1570
1571                 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1572
1573                 card->tst_index ^= 1;
1574                 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1575
1576                 base = card->tst[card->tst_index];
1577                 idle = card->tst[card->tst_index ^ 1];
1578
1579                 for (e = 0; e < card->tst_size - 2; e++) {
1580                         if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1581                                 write_sram(card, idle + e,
1582                                            card->soft_tst[e].tste & TSTE_MASK);
1583                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1584                         }
1585                 }
1586         }
1587
1588         if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1589
1590                 for (e = 0; e < card->tst_size - 2; e++) {
1591                         if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1592                                 write_sram(card, idle + e,
1593                                            card->soft_tst[e].tste & TSTE_MASK);
1594                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1595                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1596                         }
1597                 }
1598
1599                 jump = base + card->tst_size - 2;
1600
1601                 write_sram(card, jump, TSTE_OPC_NULL);
1602                 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1603
1604                 mod_timer(&card->tst_timer, jiffies + 1);
1605         }
1606
1607 out:
1608         spin_unlock_irqrestore(&card->tst_lock, flags);
1609 }
1610
1611 static int
1612 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1613            int n, unsigned int opc)
1614 {
1615         unsigned long cl, avail;
1616         unsigned long idle;
1617         int e, r;
1618         u32 data;
1619
1620         avail = card->tst_size - 2;
1621         for (e = 0; e < avail; e++) {
1622                 if (card->soft_tst[e].vc == NULL)
1623                         break;
1624         }
1625         if (e >= avail) {
1626                 printk("%s: No free TST entries found\n", card->name);
1627                 return -1;
1628         }
1629
1630         NPRINTK("%s: conn %d: first TST entry at %d.\n",
1631                 card->name, vc ? vc->index : -1, e);
1632
1633         r = n;
1634         cl = avail;
1635         data = opc & TSTE_OPC_MASK;
1636         if (vc && (opc != TSTE_OPC_NULL))
1637                 data = opc | vc->index;
1638
1639         idle = card->tst[card->tst_index ^ 1];
1640
1641         /*
1642          * Fill Soft TST.
1643          */
1644         while (r > 0) {
1645                 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1646                         if (vc)
1647                                 card->soft_tst[e].vc = vc;
1648                         else
1649                                 card->soft_tst[e].vc = (void *)-1;
1650
1651                         card->soft_tst[e].tste = data;
1652                         if (timer_pending(&card->tst_timer))
1653                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1654                         else {
1655                                 write_sram(card, idle + e, data);
1656                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1657                         }
1658
1659                         cl -= card->tst_size;
1660                         r--;
1661                 }
1662
1663                 if (++e == avail)
1664                         e = 0;
1665                 cl += n;
1666         }
1667
1668         return 0;
1669 }
1670
1671 static int
1672 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1673 {
1674         unsigned long flags;
1675         int res;
1676
1677         spin_lock_irqsave(&card->tst_lock, flags);
1678
1679         res = __fill_tst(card, vc, n, opc);
1680
1681         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1682         if (!timer_pending(&card->tst_timer))
1683                 mod_timer(&card->tst_timer, jiffies + 1);
1684
1685         spin_unlock_irqrestore(&card->tst_lock, flags);
1686         return res;
1687 }
1688
1689 static int
1690 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1691 {
1692         unsigned long idle;
1693         int e;
1694
1695         idle = card->tst[card->tst_index ^ 1];
1696
1697         for (e = 0; e < card->tst_size - 2; e++) {
1698                 if (card->soft_tst[e].vc == vc) {
1699                         card->soft_tst[e].vc = NULL;
1700
1701                         card->soft_tst[e].tste = TSTE_OPC_VAR;
1702                         if (timer_pending(&card->tst_timer))
1703                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1704                         else {
1705                                 write_sram(card, idle + e, TSTE_OPC_VAR);
1706                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1707                         }
1708                 }
1709         }
1710
1711         return 0;
1712 }
1713
1714 static int
1715 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1716 {
1717         unsigned long flags;
1718         int res;
1719
1720         spin_lock_irqsave(&card->tst_lock, flags);
1721
1722         res = __clear_tst(card, vc);
1723
1724         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1725         if (!timer_pending(&card->tst_timer))
1726                 mod_timer(&card->tst_timer, jiffies + 1);
1727
1728         spin_unlock_irqrestore(&card->tst_lock, flags);
1729         return res;
1730 }
1731
1732 static int
1733 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1734            int n, unsigned int opc)
1735 {
1736         unsigned long flags;
1737         int res;
1738
1739         spin_lock_irqsave(&card->tst_lock, flags);
1740
1741         __clear_tst(card, vc);
1742         res = __fill_tst(card, vc, n, opc);
1743
1744         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1745         if (!timer_pending(&card->tst_timer))
1746                 mod_timer(&card->tst_timer, jiffies + 1);
1747
1748         spin_unlock_irqrestore(&card->tst_lock, flags);
1749         return res;
1750 }
1751
1752
1753 static int
1754 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1755 {
1756         unsigned long tct;
1757
1758         tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1759
1760         switch (vc->class) {
1761         case SCHED_CBR:
1762                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1763                         card->name, tct, vc->scq->scd);
1764
1765                 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1766                 write_sram(card, tct + 1, 0);
1767                 write_sram(card, tct + 2, 0);
1768                 write_sram(card, tct + 3, 0);
1769                 write_sram(card, tct + 4, 0);
1770                 write_sram(card, tct + 5, 0);
1771                 write_sram(card, tct + 6, 0);
1772                 write_sram(card, tct + 7, 0);
1773                 break;
1774
1775         case SCHED_UBR:
1776                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1777                         card->name, tct, vc->scq->scd);
1778
1779                 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1780                 write_sram(card, tct + 1, 0);
1781                 write_sram(card, tct + 2, TCT_TSIF);
1782                 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1783                 write_sram(card, tct + 4, 0);
1784                 write_sram(card, tct + 5, vc->init_er);
1785                 write_sram(card, tct + 6, 0);
1786                 write_sram(card, tct + 7, TCT_FLAG_UBR);
1787                 break;
1788
1789         case SCHED_VBR:
1790         case SCHED_ABR:
1791         default:
1792                 return -ENOSYS;
1793         }
1794
1795         return 0;
1796 }
1797
1798 /*****************************************************************************/
1799 /*                                                                           */
1800 /* FBQ Handling                                                              */
1801 /*                                                                           */
1802 /*****************************************************************************/
1803
1804 static __inline__ int
1805 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1806 {
1807         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1808 }
1809
1810 static __inline__ int
1811 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1812 {
1813         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1814 }
1815
1816 static int
1817 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1818 {
1819         unsigned long flags;
1820         u32 handle;
1821         u32 addr;
1822
1823         skb->data = skb->head;
1824         skb_reset_tail_pointer(skb);
1825         skb->len = 0;
1826
1827         skb_reserve(skb, 16);
1828
1829         switch (queue) {
1830         case 0:
1831                 skb_put(skb, SAR_FB_SIZE_0);
1832                 break;
1833         case 1:
1834                 skb_put(skb, SAR_FB_SIZE_1);
1835                 break;
1836         case 2:
1837                 skb_put(skb, SAR_FB_SIZE_2);
1838                 break;
1839         case 3:
1840                 skb_put(skb, SAR_FB_SIZE_3);
1841                 break;
1842         default:
1843                 return -1;
1844         }
1845
1846         if (idt77252_fbq_full(card, queue))
1847                 return -1;
1848
1849         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1850
1851         handle = IDT77252_PRV_POOL(skb);
1852         addr = IDT77252_PRV_PADDR(skb);
1853
1854         spin_lock_irqsave(&card->cmd_lock, flags);
1855         writel(handle, card->fbq[queue]);
1856         writel(addr, card->fbq[queue]);
1857         spin_unlock_irqrestore(&card->cmd_lock, flags);
1858
1859         return 0;
1860 }
1861
1862 static void
1863 add_rx_skb(struct idt77252_dev *card, int queue,
1864            unsigned int size, unsigned int count)
1865 {
1866         struct sk_buff *skb;
1867         dma_addr_t paddr;
1868         u32 handle;
1869
1870         while (count--) {
1871                 skb = dev_alloc_skb(size);
1872                 if (!skb)
1873                         return;
1874
1875                 if (sb_pool_add(card, skb, queue)) {
1876                         printk("%s: SB POOL full\n", __FUNCTION__);
1877                         goto outfree;
1878                 }
1879
1880                 paddr = pci_map_single(card->pcidev, skb->data,
1881                                        skb_end_pointer(skb) - skb->data,
1882                                        PCI_DMA_FROMDEVICE);
1883                 IDT77252_PRV_PADDR(skb) = paddr;
1884
1885                 if (push_rx_skb(card, skb, queue)) {
1886                         printk("%s: FB QUEUE full\n", __FUNCTION__);
1887                         goto outunmap;
1888                 }
1889         }
1890
1891         return;
1892
1893 outunmap:
1894         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1895                          skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1896
1897         handle = IDT77252_PRV_POOL(skb);
1898         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1899
1900 outfree:
1901         dev_kfree_skb(skb);
1902 }
1903
1904
1905 static void
1906 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1907 {
1908         u32 handle = IDT77252_PRV_POOL(skb);
1909         int err;
1910
1911         pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1912                                        skb_end_pointer(skb) - skb->data,
1913                                        PCI_DMA_FROMDEVICE);
1914
1915         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1916         if (err) {
1917                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1918                                  skb_end_pointer(skb) - skb->data,
1919                                  PCI_DMA_FROMDEVICE);
1920                 sb_pool_remove(card, skb);
1921                 dev_kfree_skb(skb);
1922         }
1923 }
1924
1925 static void
1926 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1927 {
1928         rpp->len = 0;
1929         rpp->count = 0;
1930         rpp->first = NULL;
1931         rpp->last = &rpp->first;
1932 }
1933
1934 static void
1935 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1936 {
1937         struct sk_buff *skb, *next;
1938         int i;
1939
1940         skb = rpp->first;
1941         for (i = 0; i < rpp->count; i++) {
1942                 next = skb->next;
1943                 skb->next = NULL;
1944                 recycle_rx_skb(card, skb);
1945                 skb = next;
1946         }
1947         flush_rx_pool(card, rpp);
1948 }
1949
1950 /*****************************************************************************/
1951 /*                                                                           */
1952 /* ATM Interface                                                             */
1953 /*                                                                           */
1954 /*****************************************************************************/
1955
1956 static void
1957 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1958 {
1959         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1960 }
1961
1962 static unsigned char
1963 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1964 {
1965         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1966 }
1967
1968 static inline int
1969 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1970 {
1971         struct atm_dev *dev = vcc->dev;
1972         struct idt77252_dev *card = dev->dev_data;
1973         struct vc_map *vc = vcc->dev_data;
1974         int err;
1975
1976         if (vc == NULL) {
1977                 printk("%s: NULL connection in send().\n", card->name);
1978                 atomic_inc(&vcc->stats->tx_err);
1979                 dev_kfree_skb(skb);
1980                 return -EINVAL;
1981         }
1982         if (!test_bit(VCF_TX, &vc->flags)) {
1983                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1984                 atomic_inc(&vcc->stats->tx_err);
1985                 dev_kfree_skb(skb);
1986                 return -EINVAL;
1987         }
1988
1989         switch (vcc->qos.aal) {
1990         case ATM_AAL0:
1991         case ATM_AAL1:
1992         case ATM_AAL5:
1993                 break;
1994         default:
1995                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1996                 atomic_inc(&vcc->stats->tx_err);
1997                 dev_kfree_skb(skb);
1998                 return -EINVAL;
1999         }
2000
2001         if (skb_shinfo(skb)->nr_frags != 0) {
2002                 printk("%s: No scatter-gather yet.\n", card->name);
2003                 atomic_inc(&vcc->stats->tx_err);
2004                 dev_kfree_skb(skb);
2005                 return -EINVAL;
2006         }
2007         ATM_SKB(skb)->vcc = vcc;
2008
2009         err = queue_skb(card, vc, skb, oam);
2010         if (err) {
2011                 atomic_inc(&vcc->stats->tx_err);
2012                 dev_kfree_skb(skb);
2013                 return err;
2014         }
2015
2016         return 0;
2017 }
2018
2019 int
2020 idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2021 {
2022         return idt77252_send_skb(vcc, skb, 0);
2023 }
2024
2025 static int
2026 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2027 {
2028         struct atm_dev *dev = vcc->dev;
2029         struct idt77252_dev *card = dev->dev_data;
2030         struct sk_buff *skb;
2031
2032         skb = dev_alloc_skb(64);
2033         if (!skb) {
2034                 printk("%s: Out of memory in send_oam().\n", card->name);
2035                 atomic_inc(&vcc->stats->tx_err);
2036                 return -ENOMEM;
2037         }
2038         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2039
2040         memcpy(skb_put(skb, 52), cell, 52);
2041
2042         return idt77252_send_skb(vcc, skb, 1);
2043 }
2044
2045 static __inline__ unsigned int
2046 idt77252_fls(unsigned int x)
2047 {
2048         int r = 1;
2049
2050         if (x == 0)
2051                 return 0;
2052         if (x & 0xffff0000) {
2053                 x >>= 16;
2054                 r += 16;
2055         }
2056         if (x & 0xff00) {
2057                 x >>= 8;
2058                 r += 8;
2059         }
2060         if (x & 0xf0) {
2061                 x >>= 4;
2062                 r += 4;
2063         }
2064         if (x & 0xc) {
2065                 x >>= 2;
2066                 r += 2;
2067         }
2068         if (x & 0x2)
2069                 r += 1;
2070         return r;
2071 }
2072
2073 static u16
2074 idt77252_int_to_atmfp(unsigned int rate)
2075 {
2076         u16 m, e;
2077
2078         if (rate == 0)
2079                 return 0;
2080         e = idt77252_fls(rate) - 1;
2081         if (e < 9)
2082                 m = (rate - (1 << e)) << (9 - e);
2083         else if (e == 9)
2084                 m = (rate - (1 << e));
2085         else /* e > 9 */
2086                 m = (rate - (1 << e)) >> (e - 9);
2087         return 0x4000 | (e << 9) | m;
2088 }
2089
2090 static u8
2091 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2092 {
2093         u16 afp;
2094
2095         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2096         if (pcr < 0)
2097                 return rate_to_log[(afp >> 5) & 0x1ff];
2098         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2099 }
2100
2101 static void
2102 idt77252_est_timer(unsigned long data)
2103 {
2104         struct vc_map *vc = (struct vc_map *)data;
2105         struct idt77252_dev *card = vc->card;
2106         struct rate_estimator *est;
2107         unsigned long flags;
2108         u32 rate, cps;
2109         u64 ncells;
2110         u8 lacr;
2111
2112         spin_lock_irqsave(&vc->lock, flags);
2113         est = vc->estimator;
2114         if (!est)
2115                 goto out;
2116
2117         ncells = est->cells;
2118
2119         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2120         est->last_cells = ncells;
2121         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2122         est->cps = (est->avcps + 0x1f) >> 5;
2123
2124         cps = est->cps;
2125         if (cps < (est->maxcps >> 4))
2126                 cps = est->maxcps >> 4;
2127
2128         lacr = idt77252_rate_logindex(card, cps);
2129         if (lacr > vc->max_er)
2130                 lacr = vc->max_er;
2131
2132         if (lacr != vc->lacr) {
2133                 vc->lacr = lacr;
2134                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2135         }
2136
2137         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2138         add_timer(&est->timer);
2139
2140 out:
2141         spin_unlock_irqrestore(&vc->lock, flags);
2142 }
2143
2144 static struct rate_estimator *
2145 idt77252_init_est(struct vc_map *vc, int pcr)
2146 {
2147         struct rate_estimator *est;
2148
2149         est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2150         if (!est)
2151                 return NULL;
2152         est->maxcps = pcr < 0 ? -pcr : pcr;
2153         est->cps = est->maxcps;
2154         est->avcps = est->cps << 5;
2155
2156         est->interval = 2;              /* XXX: make this configurable */
2157         est->ewma_log = 2;              /* XXX: make this configurable */
2158         init_timer(&est->timer);
2159         est->timer.data = (unsigned long)vc;
2160         est->timer.function = idt77252_est_timer;
2161
2162         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2163         add_timer(&est->timer);
2164
2165         return est;
2166 }
2167
2168 static int
2169 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2170                   struct atm_vcc *vcc, struct atm_qos *qos)
2171 {
2172         int tst_free, tst_used, tst_entries;
2173         unsigned long tmpl, modl;
2174         int tcr, tcra;
2175
2176         if ((qos->txtp.max_pcr == 0) &&
2177             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2178                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2179                        card->name);
2180                 return -EINVAL;
2181         }
2182
2183         tst_used = 0;
2184         tst_free = card->tst_free;
2185         if (test_bit(VCF_TX, &vc->flags))
2186                 tst_used = vc->ntste;
2187         tst_free += tst_used;
2188
2189         tcr = atm_pcr_goal(&qos->txtp);
2190         tcra = tcr >= 0 ? tcr : -tcr;
2191
2192         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2193
2194         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2195         modl = tmpl % (unsigned long)card->utopia_pcr;
2196
2197         tst_entries = (int) (tmpl / card->utopia_pcr);
2198         if (tcr > 0) {
2199                 if (modl > 0)
2200                         tst_entries++;
2201         } else if (tcr == 0) {
2202                 tst_entries = tst_free - SAR_TST_RESERVED;
2203                 if (tst_entries <= 0) {
2204                         printk("%s: no CBR bandwidth free.\n", card->name);
2205                         return -ENOSR;
2206                 }
2207         }
2208
2209         if (tst_entries == 0) {
2210                 printk("%s: selected CBR bandwidth < granularity.\n",
2211                        card->name);
2212                 return -EINVAL;
2213         }
2214
2215         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2216                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2217                 return -ENOSR;
2218         }
2219
2220         vc->ntste = tst_entries;
2221
2222         card->tst_free = tst_free - tst_entries;
2223         if (test_bit(VCF_TX, &vc->flags)) {
2224                 if (tst_used == tst_entries)
2225                         return 0;
2226
2227                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2228                         card->name, tst_used, tst_entries);
2229                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2230                 return 0;
2231         }
2232
2233         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2234         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2235         return 0;
2236 }
2237
2238 static int
2239 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2240                   struct atm_vcc *vcc, struct atm_qos *qos)
2241 {
2242         unsigned long flags;
2243         int tcr;
2244
2245         spin_lock_irqsave(&vc->lock, flags);
2246         if (vc->estimator) {
2247                 del_timer(&vc->estimator->timer);
2248                 kfree(vc->estimator);
2249                 vc->estimator = NULL;
2250         }
2251         spin_unlock_irqrestore(&vc->lock, flags);
2252
2253         tcr = atm_pcr_goal(&qos->txtp);
2254         if (tcr == 0)
2255                 tcr = card->link_pcr;
2256
2257         vc->estimator = idt77252_init_est(vc, tcr);
2258
2259         vc->class = SCHED_UBR;
2260         vc->init_er = idt77252_rate_logindex(card, tcr);
2261         vc->lacr = vc->init_er;
2262         if (tcr < 0)
2263                 vc->max_er = vc->init_er;
2264         else
2265                 vc->max_er = 0xff;
2266
2267         return 0;
2268 }
2269
2270 static int
2271 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2272                  struct atm_vcc *vcc, struct atm_qos *qos)
2273 {
2274         int error;
2275
2276         if (test_bit(VCF_TX, &vc->flags))
2277                 return -EBUSY;
2278
2279         switch (qos->txtp.traffic_class) {
2280                 case ATM_CBR:
2281                         vc->class = SCHED_CBR;
2282                         break;
2283
2284                 case ATM_UBR:
2285                         vc->class = SCHED_UBR;
2286                         break;
2287
2288                 case ATM_VBR:
2289                 case ATM_ABR:
2290                 default:
2291                         return -EPROTONOSUPPORT;
2292         }
2293
2294         vc->scq = alloc_scq(card, vc->class);
2295         if (!vc->scq) {
2296                 printk("%s: can't get SCQ.\n", card->name);
2297                 return -ENOMEM;
2298         }
2299
2300         vc->scq->scd = get_free_scd(card, vc);
2301         if (vc->scq->scd == 0) {
2302                 printk("%s: no SCD available.\n", card->name);
2303                 free_scq(card, vc->scq);
2304                 return -ENOMEM;
2305         }
2306
2307         fill_scd(card, vc->scq, vc->class);
2308
2309         if (set_tct(card, vc)) {
2310                 printk("%s: class %d not supported.\n",
2311                        card->name, qos->txtp.traffic_class);
2312
2313                 card->scd2vc[vc->scd_index] = NULL;
2314                 free_scq(card, vc->scq);
2315                 return -EPROTONOSUPPORT;
2316         }
2317
2318         switch (vc->class) {
2319                 case SCHED_CBR:
2320                         error = idt77252_init_cbr(card, vc, vcc, qos);
2321                         if (error) {
2322                                 card->scd2vc[vc->scd_index] = NULL;
2323                                 free_scq(card, vc->scq);
2324                                 return error;
2325                         }
2326
2327                         clear_bit(VCF_IDLE, &vc->flags);
2328                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2329                         break;
2330
2331                 case SCHED_UBR:
2332                         error = idt77252_init_ubr(card, vc, vcc, qos);
2333                         if (error) {
2334                                 card->scd2vc[vc->scd_index] = NULL;
2335                                 free_scq(card, vc->scq);
2336                                 return error;
2337                         }
2338
2339                         set_bit(VCF_IDLE, &vc->flags);
2340                         break;
2341         }
2342
2343         vc->tx_vcc = vcc;
2344         set_bit(VCF_TX, &vc->flags);
2345         return 0;
2346 }
2347
2348 static int
2349 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2350                  struct atm_vcc *vcc, struct atm_qos *qos)
2351 {
2352         unsigned long flags;
2353         unsigned long addr;
2354         u32 rcte = 0;
2355
2356         if (test_bit(VCF_RX, &vc->flags))
2357                 return -EBUSY;
2358
2359         vc->rx_vcc = vcc;
2360         set_bit(VCF_RX, &vc->flags);
2361
2362         if ((vcc->vci == 3) || (vcc->vci == 4))
2363                 return 0;
2364
2365         flush_rx_pool(card, &vc->rcv.rx_pool);
2366
2367         rcte |= SAR_RCTE_CONNECTOPEN;
2368         rcte |= SAR_RCTE_RAWCELLINTEN;
2369
2370         switch (qos->aal) {
2371                 case ATM_AAL0:
2372                         rcte |= SAR_RCTE_RCQ;
2373                         break;
2374                 case ATM_AAL1:
2375                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2376                         break;
2377                 case ATM_AAL34:
2378                         rcte |= SAR_RCTE_AAL34;
2379                         break;
2380                 case ATM_AAL5:
2381                         rcte |= SAR_RCTE_AAL5;
2382                         break;
2383                 default:
2384                         rcte |= SAR_RCTE_RCQ;
2385                         break;
2386         }
2387
2388         if (qos->aal != ATM_AAL5)
2389                 rcte |= SAR_RCTE_FBP_1;
2390         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2391                 rcte |= SAR_RCTE_FBP_3;
2392         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2393                 rcte |= SAR_RCTE_FBP_2;
2394         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2395                 rcte |= SAR_RCTE_FBP_1;
2396         else
2397                 rcte |= SAR_RCTE_FBP_01;
2398
2399         addr = card->rct_base + (vc->index << 2);
2400
2401         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2402         write_sram(card, addr, rcte);
2403
2404         spin_lock_irqsave(&card->cmd_lock, flags);
2405         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2406         waitfor_idle(card);
2407         spin_unlock_irqrestore(&card->cmd_lock, flags);
2408
2409         return 0;
2410 }
2411
2412 static int
2413 idt77252_open(struct atm_vcc *vcc)
2414 {
2415         struct atm_dev *dev = vcc->dev;
2416         struct idt77252_dev *card = dev->dev_data;
2417         struct vc_map *vc;
2418         unsigned int index;
2419         unsigned int inuse;
2420         int error;
2421         int vci = vcc->vci;
2422         short vpi = vcc->vpi;
2423
2424         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2425                 return 0;
2426
2427         if (vpi >= (1 << card->vpibits)) {
2428                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2429                 return -EINVAL;
2430         }
2431
2432         if (vci >= (1 << card->vcibits)) {
2433                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2434                 return -EINVAL;
2435         }
2436
2437         set_bit(ATM_VF_ADDR, &vcc->flags);
2438
2439         mutex_lock(&card->mutex);
2440
2441         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2442
2443         switch (vcc->qos.aal) {
2444         case ATM_AAL0:
2445         case ATM_AAL1:
2446         case ATM_AAL5:
2447                 break;
2448         default:
2449                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2450                 mutex_unlock(&card->mutex);
2451                 return -EPROTONOSUPPORT;
2452         }
2453
2454         index = VPCI2VC(card, vpi, vci);
2455         if (!card->vcs[index]) {
2456                 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2457                 if (!card->vcs[index]) {
2458                         printk("%s: can't alloc vc in open()\n", card->name);
2459                         mutex_unlock(&card->mutex);
2460                         return -ENOMEM;
2461                 }
2462                 card->vcs[index]->card = card;
2463                 card->vcs[index]->index = index;
2464
2465                 spin_lock_init(&card->vcs[index]->lock);
2466         }
2467         vc = card->vcs[index];
2468
2469         vcc->dev_data = vc;
2470
2471         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2472                 card->name, vc->index, vcc->vpi, vcc->vci,
2473                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2474                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2475                 vcc->qos.rxtp.max_sdu);
2476
2477         inuse = 0;
2478         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2479             test_bit(VCF_TX, &vc->flags))
2480                 inuse = 1;
2481         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2482             test_bit(VCF_RX, &vc->flags))
2483                 inuse += 2;
2484
2485         if (inuse) {
2486                 printk("%s: %s vci already in use.\n", card->name,
2487                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2488                 mutex_unlock(&card->mutex);
2489                 return -EADDRINUSE;
2490         }
2491
2492         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2493                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2494                 if (error) {
2495                         mutex_unlock(&card->mutex);
2496                         return error;
2497                 }
2498         }
2499
2500         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2501                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2502                 if (error) {
2503                         mutex_unlock(&card->mutex);
2504                         return error;
2505                 }
2506         }
2507
2508         set_bit(ATM_VF_READY, &vcc->flags);
2509
2510         mutex_unlock(&card->mutex);
2511         return 0;
2512 }
2513
2514 static void
2515 idt77252_close(struct atm_vcc *vcc)
2516 {
2517         struct atm_dev *dev = vcc->dev;
2518         struct idt77252_dev *card = dev->dev_data;
2519         struct vc_map *vc = vcc->dev_data;
2520         unsigned long flags;
2521         unsigned long addr;
2522         unsigned long timeout;
2523
2524         mutex_lock(&card->mutex);
2525
2526         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2527                 card->name, vc->index, vcc->vpi, vcc->vci);
2528
2529         clear_bit(ATM_VF_READY, &vcc->flags);
2530
2531         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2532
2533                 spin_lock_irqsave(&vc->lock, flags);
2534                 clear_bit(VCF_RX, &vc->flags);
2535                 vc->rx_vcc = NULL;
2536                 spin_unlock_irqrestore(&vc->lock, flags);
2537
2538                 if ((vcc->vci == 3) || (vcc->vci == 4))
2539                         goto done;
2540
2541                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2542
2543                 spin_lock_irqsave(&card->cmd_lock, flags);
2544                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2545                 waitfor_idle(card);
2546                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2547
2548                 if (vc->rcv.rx_pool.count) {
2549                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2550                                 card->name);
2551
2552                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2553                 }
2554         }
2555
2556 done:
2557         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2558
2559                 spin_lock_irqsave(&vc->lock, flags);
2560                 clear_bit(VCF_TX, &vc->flags);
2561                 clear_bit(VCF_IDLE, &vc->flags);
2562                 clear_bit(VCF_RSV, &vc->flags);
2563                 vc->tx_vcc = NULL;
2564
2565                 if (vc->estimator) {
2566                         del_timer(&vc->estimator->timer);
2567                         kfree(vc->estimator);
2568                         vc->estimator = NULL;
2569                 }
2570                 spin_unlock_irqrestore(&vc->lock, flags);
2571
2572                 timeout = 5 * 1000;
2573                 while (atomic_read(&vc->scq->used) > 0) {
2574                         timeout = msleep_interruptible(timeout);
2575                         if (!timeout)
2576                                 break;
2577                 }
2578                 if (!timeout)
2579                         printk("%s: SCQ drain timeout: %u used\n",
2580                                card->name, atomic_read(&vc->scq->used));
2581
2582                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2583                 clear_scd(card, vc->scq, vc->class);
2584
2585                 if (vc->class == SCHED_CBR) {
2586                         clear_tst(card, vc);
2587                         card->tst_free += vc->ntste;
2588                         vc->ntste = 0;
2589                 }
2590
2591                 card->scd2vc[vc->scd_index] = NULL;
2592                 free_scq(card, vc->scq);
2593         }
2594
2595         mutex_unlock(&card->mutex);
2596 }
2597
2598 static int
2599 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2600 {
2601         struct atm_dev *dev = vcc->dev;
2602         struct idt77252_dev *card = dev->dev_data;
2603         struct vc_map *vc = vcc->dev_data;
2604         int error = 0;
2605
2606         mutex_lock(&card->mutex);
2607
2608         if (qos->txtp.traffic_class != ATM_NONE) {
2609                 if (!test_bit(VCF_TX, &vc->flags)) {
2610                         error = idt77252_init_tx(card, vc, vcc, qos);
2611                         if (error)
2612                                 goto out;
2613                 } else {
2614                         switch (qos->txtp.traffic_class) {
2615                         case ATM_CBR:
2616                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2617                                 if (error)
2618                                         goto out;
2619                                 break;
2620
2621                         case ATM_UBR:
2622                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2623                                 if (error)
2624                                         goto out;
2625
2626                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2627                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2628                                                vc->index, SAR_REG_TCMDQ);
2629                                 }
2630                                 break;
2631
2632                         case ATM_VBR:
2633                         case ATM_ABR:
2634                                 error = -EOPNOTSUPP;
2635                                 goto out;
2636                         }
2637                 }
2638         }
2639
2640         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2641             !test_bit(VCF_RX, &vc->flags)) {
2642                 error = idt77252_init_rx(card, vc, vcc, qos);
2643                 if (error)
2644                         goto out;
2645         }
2646
2647         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2648
2649         set_bit(ATM_VF_HASQOS, &vcc->flags);
2650
2651 out:
2652         mutex_unlock(&card->mutex);
2653         return error;
2654 }
2655
2656 static int
2657 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2658 {
2659         struct idt77252_dev *card = dev->dev_data;
2660         int i, left;
2661
2662         left = (int) *pos;
2663         if (!left--)
2664                 return sprintf(page, "IDT77252 Interrupts:\n");
2665         if (!left--)
2666                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2667         if (!left--)
2668                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2669         if (!left--)
2670                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2671         if (!left--)
2672                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2673         if (!left--)
2674                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2675         if (!left--)
2676                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2677         if (!left--)
2678                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2679         if (!left--)
2680                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2681         if (!left--)
2682                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2683         if (!left--)
2684                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2685         if (!left--)
2686                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2687         if (!left--)
2688                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2689         if (!left--)
2690                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2691         if (!left--)
2692                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2693
2694         for (i = 0; i < card->tct_size; i++) {
2695                 unsigned long tct;
2696                 struct atm_vcc *vcc;
2697                 struct vc_map *vc;
2698                 char *p;
2699
2700                 vc = card->vcs[i];
2701                 if (!vc)
2702                         continue;
2703
2704                 vcc = NULL;
2705                 if (vc->tx_vcc)
2706                         vcc = vc->tx_vcc;
2707                 if (!vcc)
2708                         continue;
2709                 if (left--)
2710                         continue;
2711
2712                 p = page;
2713                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2714                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2715
2716                 for (i = 0; i < 8; i++)
2717                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2718                 p += sprintf(p, "\n");
2719                 return p - page;
2720         }
2721         return 0;
2722 }
2723
2724 /*****************************************************************************/
2725 /*                                                                           */
2726 /* Interrupt handler                                                         */
2727 /*                                                                           */
2728 /*****************************************************************************/
2729
2730 static void
2731 idt77252_collect_stat(struct idt77252_dev *card)
2732 {
2733         u32 cdc, vpec, icc;
2734
2735         cdc = readl(SAR_REG_CDC);
2736         vpec = readl(SAR_REG_VPEC);
2737         icc = readl(SAR_REG_ICC);
2738
2739 #ifdef  NOTDEF
2740         printk("%s:", card->name);
2741
2742         if (cdc & 0x7f0000) {
2743                 char *s = "";
2744
2745                 printk(" [");
2746                 if (cdc & (1 << 22)) {
2747                         printk("%sRM ID", s);
2748                         s = " | ";
2749                 }
2750                 if (cdc & (1 << 21)) {
2751                         printk("%sCON TAB", s);
2752                         s = " | ";
2753                 }
2754                 if (cdc & (1 << 20)) {
2755                         printk("%sNO FB", s);
2756                         s = " | ";
2757                 }
2758                 if (cdc & (1 << 19)) {
2759                         printk("%sOAM CRC", s);
2760                         s = " | ";
2761                 }
2762                 if (cdc & (1 << 18)) {
2763                         printk("%sRM CRC", s);
2764                         s = " | ";
2765                 }
2766                 if (cdc & (1 << 17)) {
2767                         printk("%sRM FIFO", s);
2768                         s = " | ";
2769                 }
2770                 if (cdc & (1 << 16)) {
2771                         printk("%sRX FIFO", s);
2772                         s = " | ";
2773                 }
2774                 printk("]");
2775         }
2776
2777         printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2778                cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2779 #endif
2780 }
2781
2782 static irqreturn_t
2783 idt77252_interrupt(int irq, void *dev_id)
2784 {
2785         struct idt77252_dev *card = dev_id;
2786         u32 stat;
2787
2788         stat = readl(SAR_REG_STAT) & 0xffff;
2789         if (!stat)      /* no interrupt for us */
2790                 return IRQ_NONE;
2791
2792         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2793                 printk("%s: Re-entering irq_handler()\n", card->name);
2794                 goto out;
2795         }
2796
2797         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2798
2799         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2800                 INTPRINTK("%s: TSIF\n", card->name);
2801                 card->irqstat[15]++;
2802                 idt77252_tx(card);
2803         }
2804         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2805                 INTPRINTK("%s: TXICP\n", card->name);
2806                 card->irqstat[14]++;
2807 #ifdef CONFIG_ATM_IDT77252_DEBUG
2808                 idt77252_tx_dump(card);
2809 #endif
2810         }
2811         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2812                 INTPRINTK("%s: TSQF\n", card->name);
2813                 card->irqstat[12]++;
2814                 idt77252_tx(card);
2815         }
2816         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2817                 INTPRINTK("%s: TMROF\n", card->name);
2818                 card->irqstat[11]++;
2819                 idt77252_collect_stat(card);
2820         }
2821
2822         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2823                 INTPRINTK("%s: EPDU\n", card->name);
2824                 card->irqstat[5]++;
2825                 idt77252_rx(card);
2826         }
2827         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2828                 INTPRINTK("%s: RSQAF\n", card->name);
2829                 card->irqstat[1]++;
2830                 idt77252_rx(card);
2831         }
2832         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2833                 INTPRINTK("%s: RSQF\n", card->name);
2834                 card->irqstat[6]++;
2835                 idt77252_rx(card);
2836         }
2837         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2838                 INTPRINTK("%s: RAWCF\n", card->name);
2839                 card->irqstat[4]++;
2840                 idt77252_rx_raw(card);
2841         }
2842
2843         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2844                 INTPRINTK("%s: PHYI", card->name);
2845                 card->irqstat[10]++;
2846                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2847                         card->atmdev->phy->interrupt(card->atmdev);
2848         }
2849
2850         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2851                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2852
2853                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2854
2855                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2856
2857                 if (stat & SAR_STAT_FBQ0A)
2858                         card->irqstat[2]++;
2859                 if (stat & SAR_STAT_FBQ1A)
2860                         card->irqstat[3]++;
2861                 if (stat & SAR_STAT_FBQ2A)
2862                         card->irqstat[7]++;
2863                 if (stat & SAR_STAT_FBQ3A)
2864                         card->irqstat[8]++;
2865
2866                 schedule_work(&card->tqueue);
2867         }
2868
2869 out:
2870         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2871         return IRQ_HANDLED;
2872 }
2873
2874 static void
2875 idt77252_softint(struct work_struct *work)
2876 {
2877         struct idt77252_dev *card =
2878                 container_of(work, struct idt77252_dev, tqueue);
2879         u32 stat;
2880         int done;
2881
2882         for (done = 1; ; done = 1) {
2883                 stat = readl(SAR_REG_STAT) >> 16;
2884
2885                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2886                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2887                         done = 0;
2888                 }
2889
2890                 stat >>= 4;
2891                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2892                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2893                         done = 0;
2894                 }
2895
2896                 stat >>= 4;
2897                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2898                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2899                         done = 0;
2900                 }
2901
2902                 stat >>= 4;
2903                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2904                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2905                         done = 0;
2906                 }
2907
2908                 if (done)
2909                         break;
2910         }
2911
2912         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2913 }
2914
2915
2916 static int
2917 open_card_oam(struct idt77252_dev *card)
2918 {
2919         unsigned long flags;
2920         unsigned long addr;
2921         struct vc_map *vc;
2922         int vpi, vci;
2923         int index;
2924         u32 rcte;
2925
2926         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2927                 for (vci = 3; vci < 5; vci++) {
2928                         index = VPCI2VC(card, vpi, vci);
2929
2930                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2931                         if (!vc) {
2932                                 printk("%s: can't alloc vc\n", card->name);
2933                                 return -ENOMEM;
2934                         }
2935                         vc->index = index;
2936                         card->vcs[index] = vc;
2937
2938                         flush_rx_pool(card, &vc->rcv.rx_pool);
2939
2940                         rcte = SAR_RCTE_CONNECTOPEN |
2941                                SAR_RCTE_RAWCELLINTEN |
2942                                SAR_RCTE_RCQ |
2943                                SAR_RCTE_FBP_1;
2944
2945                         addr = card->rct_base + (vc->index << 2);
2946                         write_sram(card, addr, rcte);
2947
2948                         spin_lock_irqsave(&card->cmd_lock, flags);
2949                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2950                                SAR_REG_CMD);
2951                         waitfor_idle(card);
2952                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2953                 }
2954         }
2955
2956         return 0;
2957 }
2958
2959 static void
2960 close_card_oam(struct idt77252_dev *card)
2961 {
2962         unsigned long flags;
2963         unsigned long addr;
2964         struct vc_map *vc;
2965         int vpi, vci;
2966         int index;
2967
2968         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2969                 for (vci = 3; vci < 5; vci++) {
2970                         index = VPCI2VC(card, vpi, vci);
2971                         vc = card->vcs[index];
2972
2973                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2974
2975                         spin_lock_irqsave(&card->cmd_lock, flags);
2976                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2977                                SAR_REG_CMD);
2978                         waitfor_idle(card);
2979                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2980
2981                         if (vc->rcv.rx_pool.count) {
2982                                 DPRINTK("%s: closing a VC "
2983                                         "with pending rx buffers.\n",
2984                                         card->name);
2985
2986                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2987                         }
2988                 }
2989         }
2990 }
2991
2992 static int
2993 open_card_ubr0(struct idt77252_dev *card)
2994 {
2995         struct vc_map *vc;
2996
2997         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2998         if (!vc) {
2999                 printk("%s: can't alloc vc\n", card->name);
3000                 return -ENOMEM;
3001         }
3002         card->vcs[0] = vc;
3003         vc->class = SCHED_UBR0;
3004
3005         vc->scq = alloc_scq(card, vc->class);
3006         if (!vc->scq) {
3007                 printk("%s: can't get SCQ.\n", card->name);
3008                 return -ENOMEM;
3009         }
3010
3011         card->scd2vc[0] = vc;
3012         vc->scd_index = 0;
3013         vc->scq->scd = card->scd_base;
3014
3015         fill_scd(card, vc->scq, vc->class);
3016
3017         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3018         write_sram(card, card->tct_base + 1, 0);
3019         write_sram(card, card->tct_base + 2, 0);
3020         write_sram(card, card->tct_base + 3, 0);
3021         write_sram(card, card->tct_base + 4, 0);
3022         write_sram(card, card->tct_base + 5, 0);
3023         write_sram(card, card->tct_base + 6, 0);
3024         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3025
3026         clear_bit(VCF_IDLE, &vc->flags);
3027         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3028         return 0;
3029 }
3030
3031 static int
3032 idt77252_dev_open(struct idt77252_dev *card)
3033 {
3034         u32 conf;
3035
3036         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3037                 printk("%s: SAR not yet initialized.\n", card->name);
3038                 return -1;
3039         }
3040
3041         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
3042             SAR_RX_DELAY |      /* interrupt on complete PDU            */
3043             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
3044             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
3045             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
3046             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
3047             SAR_CFG_TXEN |      /* transmit operation enable            */
3048             SAR_CFG_TXINT |     /* interrupt on transmit status         */
3049             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
3050             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
3051             SAR_CFG_PHYIE       /* enable PHY interrupts                */
3052             ;
3053
3054 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3055         /* Test RAW cell receive. */
3056         conf |= SAR_CFG_VPECA;
3057 #endif
3058
3059         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3060
3061         if (open_card_oam(card)) {
3062                 printk("%s: Error initializing OAM.\n", card->name);
3063                 return -1;
3064         }
3065
3066         if (open_card_ubr0(card)) {
3067                 printk("%s: Error initializing UBR0.\n", card->name);
3068                 return -1;
3069         }
3070
3071         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3072         return 0;
3073 }
3074
3075 void
3076 idt77252_dev_close(struct atm_dev *dev)
3077 {
3078         struct idt77252_dev *card = dev->dev_data;
3079         u32 conf;
3080
3081         close_card_oam(card);
3082
3083         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3084             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3085             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3086             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3087             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3088             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3089             SAR_CFG_TXEN |      /* transmit operation enable     */
3090             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3091             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3092             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3093             ;
3094
3095         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3096
3097         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3098 }
3099
3100
3101 /*****************************************************************************/
3102 /*                                                                           */
3103 /* Initialisation and Deinitialization of IDT77252                           */
3104 /*                                                                           */
3105 /*****************************************************************************/
3106
3107
3108 static void
3109 deinit_card(struct idt77252_dev *card)
3110 {
3111         struct sk_buff *skb;
3112         int i, j;
3113
3114         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3115                 printk("%s: SAR not yet initialized.\n", card->name);
3116                 return;
3117         }
3118         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3119
3120         writel(0, SAR_REG_CFG);
3121
3122         if (card->atmdev)
3123                 atm_dev_deregister(card->atmdev);
3124
3125         for (i = 0; i < 4; i++) {
3126                 for (j = 0; j < FBQ_SIZE; j++) {
3127                         skb = card->sbpool[i].skb[j];
3128                         if (skb) {
3129                                 pci_unmap_single(card->pcidev,
3130                                                  IDT77252_PRV_PADDR(skb),
3131                                                  (skb_end_pointer(skb) -
3132                                                   skb->data),
3133                                                  PCI_DMA_FROMDEVICE);
3134                                 card->sbpool[i].skb[j] = NULL;
3135                                 dev_kfree_skb(skb);
3136                         }
3137                 }
3138         }
3139
3140         vfree(card->soft_tst);
3141
3142         vfree(card->scd2vc);
3143
3144         vfree(card->vcs);
3145
3146         if (card->raw_cell_hnd) {
3147                 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3148                                     card->raw_cell_hnd, card->raw_cell_paddr);
3149         }
3150
3151         if (card->rsq.base) {
3152                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3153                 deinit_rsq(card);
3154         }
3155
3156         if (card->tsq.base) {
3157                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3158                 deinit_tsq(card);
3159         }
3160
3161         DIPRINTK("idt77252: Release IRQ.\n");
3162         free_irq(card->pcidev->irq, card);
3163
3164         for (i = 0; i < 4; i++) {
3165                 if (card->fbq[i])
3166                         iounmap(card->fbq[i]);
3167         }
3168
3169         if (card->membase)
3170                 iounmap(card->membase);
3171
3172         clear_bit(IDT77252_BIT_INIT, &card->flags);
3173         DIPRINTK("%s: Card deinitialized.\n", card->name);
3174 }
3175
3176
3177 static int __devinit
3178 init_sram(struct idt77252_dev *card)
3179 {
3180         int i;
3181
3182         for (i = 0; i < card->sramsize; i += 4)
3183                 write_sram(card, (i >> 2), 0);
3184
3185         /* set SRAM layout for THIS card */
3186         if (card->sramsize == (512 * 1024)) {
3187                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3188                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3189                     / SAR_SRAM_TCT_SIZE;
3190                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3191                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3192                     / SAR_SRAM_RCT_SIZE;
3193                 card->rt_base = SAR_SRAM_RT_128_BASE;
3194                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3195                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3196                     / SAR_SRAM_SCD_SIZE;
3197                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3198                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3199                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3200                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3201                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3202                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3203                 card->fifo_size = SAR_RXFD_SIZE_32K;
3204         } else {
3205                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3206                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3207                     / SAR_SRAM_TCT_SIZE;
3208                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3209                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3210                     / SAR_SRAM_RCT_SIZE;
3211                 card->rt_base = SAR_SRAM_RT_32_BASE;
3212                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3213                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3214                     / SAR_SRAM_SCD_SIZE;
3215                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3216                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3217                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3218                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3219                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3220                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3221                 card->fifo_size = SAR_RXFD_SIZE_4K;
3222         }
3223
3224         /* Initialize TCT */
3225         for (i = 0; i < card->tct_size; i++) {
3226                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3227                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3228                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3229                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3230                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3231                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3232                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3233                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3234         }
3235
3236         /* Initialize RCT */
3237         for (i = 0; i < card->rct_size; i++) {
3238                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3239                                     (u32) SAR_RCTE_RAWCELLINTEN);
3240                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3241                                     (u32) 0);
3242                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3243                                     (u32) 0);
3244                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3245                                     (u32) 0xffffffff);
3246         }
3247
3248         writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3249                (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3250         writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3251                (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3252         writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3253                (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3254         writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3255                (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3256
3257         /* Initialize rate table  */
3258         for (i = 0; i < 256; i++) {
3259                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3260         }
3261
3262         for (i = 0; i < 128; i++) {
3263                 unsigned int tmp;
3264
3265                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3266                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3267                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3268                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3269                 write_sram(card, card->rt_base + 256 + i, tmp);
3270         }
3271
3272 #if 0 /* Fill RDF and AIR tables. */
3273         for (i = 0; i < 128; i++) {
3274                 unsigned int tmp;
3275
3276                 tmp = RDF[0][(i << 1) + 0] << 16;
3277                 tmp |= RDF[0][(i << 1) + 1] << 0;
3278                 write_sram(card, card->rt_base + 512 + i, tmp);
3279         }
3280
3281         for (i = 0; i < 128; i++) {
3282                 unsigned int tmp;
3283
3284                 tmp = AIR[0][(i << 1) + 0] << 16;
3285                 tmp |= AIR[0][(i << 1) + 1] << 0;
3286                 write_sram(card, card->rt_base + 640 + i, tmp);
3287         }
3288 #endif
3289
3290         IPRINTK("%s: initialize rate table ...\n", card->name);
3291         writel(card->rt_base << 2, SAR_REG_RTBL);
3292
3293         /* Initialize TSTs */
3294         IPRINTK("%s: initialize TST ...\n", card->name);
3295         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3296
3297         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3298                 write_sram(card, i, TSTE_OPC_VAR);
3299         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3300         idt77252_sram_write_errors = 1;
3301         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3302         idt77252_sram_write_errors = 0;
3303         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3304                 write_sram(card, i, TSTE_OPC_VAR);
3305         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3306         idt77252_sram_write_errors = 1;
3307         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3308         idt77252_sram_write_errors = 0;
3309
3310         card->tst_index = 0;
3311         writel(card->tst[0] << 2, SAR_REG_TSTB);
3312
3313         /* Initialize ABRSTD and Receive FIFO */
3314         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3315         writel(card->abrst_size | (card->abrst_base << 2),
3316                SAR_REG_ABRSTD);
3317
3318         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3319         writel(card->fifo_size | (card->fifo_base << 2),
3320                SAR_REG_RXFD);
3321
3322         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3323         return 0;
3324 }
3325
3326 static int __devinit
3327 init_card(struct atm_dev *dev)
3328 {
3329         struct idt77252_dev *card = dev->dev_data;
3330         struct pci_dev *pcidev = card->pcidev;
3331         unsigned long tmpl, modl;
3332         unsigned int linkrate, rsvdcr;
3333         unsigned int tst_entries;
3334         struct net_device *tmp;
3335         char tname[10];
3336
3337         u32 size;
3338         u_char pci_byte;
3339         u32 conf;
3340         int i, k;
3341
3342         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3343                 printk("Error: SAR already initialized.\n");
3344                 return -1;
3345         }
3346
3347 /*****************************************************************/
3348 /*   P C I   C O N F I G U R A T I O N                           */
3349 /*****************************************************************/
3350
3351         /* Set PCI Retry-Timeout and TRDY timeout */
3352         IPRINTK("%s: Checking PCI retries.\n", card->name);
3353         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3354                 printk("%s: can't read PCI retry timeout.\n", card->name);
3355                 deinit_card(card);
3356                 return -1;
3357         }
3358         if (pci_byte != 0) {
3359                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3360                         card->name, pci_byte);
3361                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3362                         printk("%s: can't set PCI retry timeout.\n",
3363                                card->name);
3364                         deinit_card(card);
3365                         return -1;
3366                 }
3367         }
3368         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3369         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3370                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3371                 deinit_card(card);
3372                 return -1;
3373         }
3374         if (pci_byte != 0) {
3375                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3376                         card->name, pci_byte);
3377                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3378                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3379                         deinit_card(card);
3380                         return -1;
3381                 }
3382         }
3383         /* Reset Timer register */
3384         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3385                 printk("%s: resetting timer overflow.\n", card->name);
3386                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3387         }
3388         IPRINTK("%s: Request IRQ ... ", card->name);
3389         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3390                         card->name, card) != 0) {
3391                 printk("%s: can't allocate IRQ.\n", card->name);
3392                 deinit_card(card);
3393                 return -1;
3394         }
3395         IPRINTK("got %d.\n", pcidev->irq);
3396
3397 /*****************************************************************/
3398 /*   C H E C K   A N D   I N I T   S R A M                       */
3399 /*****************************************************************/
3400
3401         IPRINTK("%s: Initializing SRAM\n", card->name);
3402
3403         /* preset size of connecton table, so that init_sram() knows about it */
3404         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3405                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3406                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3407 #ifndef ATM_IDT77252_SEND_IDLE
3408                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3409 #endif
3410                 0;
3411
3412         if (card->sramsize == (512 * 1024))
3413                 conf |= SAR_CFG_CNTBL_1k;
3414         else
3415                 conf |= SAR_CFG_CNTBL_512;
3416
3417         switch (vpibits) {
3418         case 0:
3419                 conf |= SAR_CFG_VPVCS_0;
3420                 break;
3421         default:
3422         case 1:
3423                 conf |= SAR_CFG_VPVCS_1;
3424                 break;
3425         case 2:
3426                 conf |= SAR_CFG_VPVCS_2;
3427                 break;
3428         case 8:
3429                 conf |= SAR_CFG_VPVCS_8;
3430                 break;
3431         }
3432
3433         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3434
3435         if (init_sram(card) < 0)
3436                 return -1;
3437
3438 /********************************************************************/
3439 /*  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 */
3440 /********************************************************************/
3441         /* Initialize TSQ */
3442         if (0 != init_tsq(card)) {
3443                 deinit_card(card);
3444                 return -1;
3445         }
3446         /* Initialize RSQ */
3447         if (0 != init_rsq(card)) {
3448                 deinit_card(card);
3449                 return -1;
3450         }
3451
3452         card->vpibits = vpibits;
3453         if (card->sramsize == (512 * 1024)) {
3454                 card->vcibits = 10 - card->vpibits;
3455         } else {
3456                 card->vcibits = 9 - card->vpibits;
3457         }
3458
3459         card->vcimask = 0;
3460         for (k = 0, i = 1; k < card->vcibits; k++) {
3461                 card->vcimask |= i;
3462                 i <<= 1;
3463         }
3464
3465         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3466         writel(0, SAR_REG_VPM);
3467
3468         /* Little Endian Order   */
3469         writel(0, SAR_REG_GP);
3470
3471         /* Initialize RAW Cell Handle Register  */
3472         card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3473                                                   &card->raw_cell_paddr);
3474         if (!card->raw_cell_hnd) {
3475                 printk("%s: memory allocation failure.\n", card->name);
3476                 deinit_card(card);
3477                 return -1;
3478         }
3479         memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3480         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3481         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3482                 card->raw_cell_hnd);
3483
3484         size = sizeof(struct vc_map *) * card->tct_size;
3485         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3486         if (NULL == (card->vcs = vmalloc(size))) {
3487                 printk("%s: memory allocation failure.\n", card->name);
3488                 deinit_card(card);
3489                 return -1;
3490         }
3491         memset(card->vcs, 0, size);
3492
3493         size = sizeof(struct vc_map *) * card->scd_size;
3494         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3495                 card->name, size);
3496         if (NULL == (card->scd2vc = vmalloc(size))) {
3497                 printk("%s: memory allocation failure.\n", card->name);
3498                 deinit_card(card);
3499                 return -1;
3500         }
3501         memset(card->scd2vc, 0, size);
3502
3503         size = sizeof(struct tst_info) * (card->tst_size - 2);
3504         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3505                 card->name, size);
3506         if (NULL == (card->soft_tst = vmalloc(size))) {
3507                 printk("%s: memory allocation failure.\n", card->name);
3508                 deinit_card(card);
3509                 return -1;
3510         }
3511         for (i = 0; i < card->tst_size - 2; i++) {
3512                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3513                 card->soft_tst[i].vc = NULL;
3514         }
3515
3516         if (dev->phy == NULL) {
3517                 printk("%s: No LT device defined.\n", card->name);
3518                 deinit_card(card);
3519                 return -1;
3520         }
3521         if (dev->phy->ioctl == NULL) {
3522                 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3523                 deinit_card(card);
3524                 return -1;
3525         }
3526
3527 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3528         /*
3529          * this is a jhs hack to get around special functionality in the
3530          * phy driver for the atecom hardware; the functionality doesn't
3531          * exist in the linux atm suni driver
3532          *
3533          * it isn't the right way to do things, but as the guy from NIST
3534          * said, talking about their measurement of the fine structure
3535          * constant, "it's good enough for government work."
3536          */
3537         linkrate = 149760000;
3538 #endif
3539
3540         card->link_pcr = (linkrate / 8 / 53);
3541         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3542                card->name, linkrate, card->link_pcr);
3543
3544 #ifdef ATM_IDT77252_SEND_IDLE
3545         card->utopia_pcr = card->link_pcr;
3546 #else
3547         card->utopia_pcr = (160000000 / 8 / 54);
3548 #endif
3549
3550         rsvdcr = 0;
3551         if (card->utopia_pcr > card->link_pcr)
3552                 rsvdcr = card->utopia_pcr - card->link_pcr;
3553
3554         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3555         modl = tmpl % (unsigned long)card->utopia_pcr;
3556         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3557         if (modl)
3558                 tst_entries++;
3559         card->tst_free -= tst_entries;
3560         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3561
3562 #ifdef HAVE_EEPROM
3563         idt77252_eeprom_init(card);
3564         printk("%s: EEPROM: %02x:", card->name,
3565                 idt77252_eeprom_read_status(card));
3566
3567         for (i = 0; i < 0x80; i++) {
3568                 printk(" %02x",
3569                 idt77252_eeprom_read_byte(card, i)
3570                 );
3571         }
3572         printk("\n");
3573 #endif /* HAVE_EEPROM */
3574
3575         /*
3576          * XXX: <hack>
3577          */
3578         sprintf(tname, "eth%d", card->index);
3579         tmp = dev_get_by_name(&init_net, tname);        /* jhs: was "tmp = dev_get(tname);" */
3580         if (tmp) {
3581                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3582
3583                 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3584                        card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3585                        card->atmdev->esi[2], card->atmdev->esi[3],
3586                        card->atmdev->esi[4], card->atmdev->esi[5]);
3587         }
3588         /*
3589          * XXX: </hack>
3590          */
3591
3592         /* Set Maximum Deficit Count for now. */
3593         writel(0xffff, SAR_REG_MDFCT);
3594
3595         set_bit(IDT77252_BIT_INIT, &card->flags);
3596
3597         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3598         return 0;
3599 }
3600
3601
3602 /*****************************************************************************/
3603 /*                                                                           */
3604 /* Probing of IDT77252 ABR SAR                                               */
3605 /*                                                                           */
3606 /*****************************************************************************/
3607
3608
3609 static int __devinit
3610 idt77252_preset(struct idt77252_dev *card)
3611 {
3612         u16 pci_command;
3613
3614 /*****************************************************************/
3615 /*   P C I   C O N F I G U R A T I O N                           */
3616 /*****************************************************************/
3617
3618         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3619                 card->name);
3620         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3621                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3622                 deinit_card(card);
3623                 return -1;
3624         }
3625         if (!(pci_command & PCI_COMMAND_IO)) {
3626                 printk("%s: PCI_COMMAND: %04x (???)\n",
3627                        card->name, pci_command);
3628                 deinit_card(card);
3629                 return (-1);
3630         }
3631         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3632         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3633                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3634                 deinit_card(card);
3635                 return -1;
3636         }
3637 /*****************************************************************/
3638 /*   G E N E R I C   R E S E T                                   */
3639 /*****************************************************************/
3640
3641         /* Software reset */
3642         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3643         mdelay(1);
3644         writel(0, SAR_REG_CFG);
3645
3646         IPRINTK("%s: Software resetted.\n", card->name);
3647         return 0;
3648 }
3649
3650
3651 static unsigned long __devinit
3652 probe_sram(struct idt77252_dev *card)
3653 {
3654         u32 data, addr;
3655
3656         writel(0, SAR_REG_DR0);
3657         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3658
3659         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3660                 writel(ATM_POISON, SAR_REG_DR0);
3661                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3662
3663                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3664                 data = readl(SAR_REG_DR0);
3665
3666                 if (data != 0)
3667                         break;
3668         }
3669
3670         return addr * sizeof(u32);
3671 }
3672
3673 static int __devinit
3674 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3675 {
3676         static struct idt77252_dev **last = &idt77252_chain;
3677         static int index = 0;
3678
3679         unsigned long membase, srambase;
3680         struct idt77252_dev *card;
3681         struct atm_dev *dev;
3682         int i, err;
3683
3684
3685         if ((err = pci_enable_device(pcidev))) {
3686                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3687                 return err;
3688         }
3689
3690         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3691         if (!card) {
3692                 printk("idt77252-%d: can't allocate private data\n", index);
3693                 err = -ENOMEM;
3694                 goto err_out_disable_pdev;
3695         }
3696         card->revision = pcidev->revision;
3697         card->index = index;
3698         card->pcidev = pcidev;
3699         sprintf(card->name, "idt77252-%d", card->index);
3700
3701         INIT_WORK(&card->tqueue, idt77252_softint);
3702
3703         membase = pci_resource_start(pcidev, 1);
3704         srambase = pci_resource_start(pcidev, 2);
3705
3706         mutex_init(&card->mutex);
3707         spin_lock_init(&card->cmd_lock);
3708         spin_lock_init(&card->tst_lock);
3709
3710         init_timer(&card->tst_timer);
3711         card->tst_timer.data = (unsigned long)card;
3712         card->tst_timer.function = tst_timer;
3713
3714         /* Do the I/O remapping... */
3715         card->membase = ioremap(membase, 1024);
3716         if (!card->membase) {
3717                 printk("%s: can't ioremap() membase\n", card->name);
3718                 err = -EIO;
3719                 goto err_out_free_card;
3720         }
3721
3722         if (idt77252_preset(card)) {
3723                 printk("%s: preset failed\n", card->name);
3724                 err = -EIO;
3725                 goto err_out_iounmap;
3726         }
3727
3728         dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3729         if (!dev) {
3730                 printk("%s: can't register atm device\n", card->name);
3731                 err = -EIO;
3732                 goto err_out_iounmap;
3733         }
3734         dev->dev_data = card;
3735         card->atmdev = dev;
3736
3737 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3738         suni_init(dev);
3739         if (!dev->phy) {
3740                 printk("%s: can't init SUNI\n", card->name);
3741                 err = -EIO;
3742                 goto err_out_deinit_card;
3743         }
3744 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3745
3746         card->sramsize = probe_sram(card);
3747
3748         for (i = 0; i < 4; i++) {
3749                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3750                 if (!card->fbq[i]) {
3751                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3752                         err = -EIO;
3753                         goto err_out_deinit_card;
3754                 }
3755         }
3756
3757         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3758                card->name, ((card->revision > 1) && (card->revision < 25)) ?
3759                'A' + card->revision - 1 : '?', membase, srambase,
3760                card->sramsize / 1024);
3761
3762         if (init_card(dev)) {
3763                 printk("%s: init_card failed\n", card->name);
3764                 err = -EIO;
3765                 goto err_out_deinit_card;
3766         }
3767
3768         dev->ci_range.vpi_bits = card->vpibits;
3769         dev->ci_range.vci_bits = card->vcibits;
3770         dev->link_rate = card->link_pcr;
3771
3772         if (dev->phy->start)
3773                 dev->phy->start(dev);
3774
3775         if (idt77252_dev_open(card)) {
3776                 printk("%s: dev_open failed\n", card->name);
3777                 err = -EIO;
3778                 goto err_out_stop;
3779         }
3780
3781         *last = card;
3782         last = &card->next;
3783         index++;
3784
3785         return 0;
3786
3787 err_out_stop:
3788         if (dev->phy->stop)
3789                 dev->phy->stop(dev);
3790
3791 err_out_deinit_card:
3792         deinit_card(card);
3793
3794 err_out_iounmap:
3795         iounmap(card->membase);
3796
3797 err_out_free_card:
3798         kfree(card);
3799
3800 err_out_disable_pdev:
3801         pci_disable_device(pcidev);
3802         return err;
3803 }
3804
3805 static struct pci_device_id idt77252_pci_tbl[] =
3806 {
3807         { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3808           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3809         { 0, }
3810 };
3811
3812 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3813
3814 static struct pci_driver idt77252_driver = {
3815         .name           = "idt77252",
3816         .id_table       = idt77252_pci_tbl,
3817         .probe          = idt77252_init_one,
3818 };
3819
3820 static int __init idt77252_init(void)
3821 {
3822         struct sk_buff *skb;
3823
3824         printk("%s: at %p\n", __FUNCTION__, idt77252_init);
3825
3826         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3827                               sizeof(struct idt77252_skb_prv)) {
3828                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3829                        __FUNCTION__, (unsigned long) sizeof(skb->cb),
3830                        (unsigned long) sizeof(struct atm_skb_data) +
3831                                        sizeof(struct idt77252_skb_prv));
3832                 return -EIO;
3833         }
3834
3835         return pci_register_driver(&idt77252_driver);
3836 }
3837
3838 static void __exit idt77252_exit(void)
3839 {
3840         struct idt77252_dev *card;
3841         struct atm_dev *dev;
3842
3843         pci_unregister_driver(&idt77252_driver);
3844
3845         while (idt77252_chain) {
3846                 card = idt77252_chain;
3847                 dev = card->atmdev;
3848                 idt77252_chain = card->next;
3849
3850                 if (dev->phy->stop)
3851                         dev->phy->stop(dev);
3852                 deinit_card(card);
3853                 pci_disable_device(card->pcidev);
3854                 kfree(card);
3855         }
3856
3857         DIPRINTK("idt77252: finished cleanup-module().\n");
3858 }
3859
3860 module_init(idt77252_init);
3861 module_exit(idt77252_exit);
3862
3863 MODULE_LICENSE("GPL");
3864
3865 module_param(vpibits, uint, 0);
3866 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3867 #ifdef CONFIG_ATM_IDT77252_DEBUG
3868 module_param(debug, ulong, 0644);
3869 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3870 #endif
3871
3872 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3873 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");