drivers/atm/idt77252.c

   1 /*******************************************************************
   2  *
   3  * Copyright (c) 2000 ATecoM GmbH
   4  *
   5  * The author may be reached at ecd@atecom.com.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  *
  12  * THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
  13  * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  15  * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
  16  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  17  * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  18  * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  19  * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  20  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  21  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  * You should have received a copy of the  GNU General Public License along
  24  * with this program; if not, write  to the Free Software Foundation, Inc.,
  25  * 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  *******************************************************************/
  28
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/poison.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/kernel.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/atmdev.h>
  37 #include <linux/atm.h>
  38 #include <linux/delay.h>
  39 #include <linux/init.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/bitops.h>
  42 #include <linux/wait.h>
  43 #include <linux/jiffies.h>
  44 #include <linux/mutex.h>
  45 #include <linux/slab.h>
  46
  47 #include <asm/io.h>
  48 #include <linux/uaccess.h>
  49 #include <linux/atomic.h>
  50 #include <asm/byteorder.h>
  51
  52 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
  53 #include "suni.h"
  54 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
  55
  56
  57 #include "idt77252.h"
  58 #include "idt77252_tables.h"
  59
  60 static unsigned int vpibits = 1;
  61
  62
  63 #define ATM_IDT77252_SEND_IDLE 1
  64
  65
  66 /*
  67  * Debug HACKs.
  68  */
  69 #define DEBUG_MODULE 1
  70 #undef HAVE_EEPROM      /* does not work, yet. */
  71
  72 #ifdef CONFIG_ATM_IDT77252_DEBUG
  73 static unsigned long debug = DBG_GENERAL;
  74 #endif
  75
  76
  77 #define SAR_RX_DELAY    (SAR_CFG_RXINT_NODELAY)
  78
  79
  80 /*
  81  * SCQ Handling.
  82  */
  83 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
  84 static void free_scq(struct idt77252_dev *, struct scq_info *);
  85 static int queue_skb(struct idt77252_dev *, struct vc_map *,
  86                      struct sk_buff *, int oam);
  87 static void drain_scq(struct idt77252_dev *, struct vc_map *);
  88 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
  89 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
  90
  91 /*
  92  * FBQ Handling.
  93  */
  94 static int push_rx_skb(struct idt77252_dev *,
  95                        struct sk_buff *, int queue);
  96 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
  97 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
  98 static void recycle_rx_pool_skb(struct idt77252_dev *,
  99                                 struct rx_pool *);
 100 static void add_rx_skb(struct idt77252_dev *, int queue,
 101                        unsigned int size, unsigned int count);
 102
 103 /*
 104  * RSQ Handling.
 105  */
 106 static int init_rsq(struct idt77252_dev *);
 107 static void deinit_rsq(struct idt77252_dev *);
 108 static void idt77252_rx(struct idt77252_dev *);
 109
 110 /*
 111  * TSQ handling.
 112  */
 113 static int init_tsq(struct idt77252_dev *);
 114 static void deinit_tsq(struct idt77252_dev *);
 115 static void idt77252_tx(struct idt77252_dev *);
 116
 117
 118 /*
 119  * ATM Interface.
 120  */
 121 static void idt77252_dev_close(struct atm_dev *dev);
 122 static int idt77252_open(struct atm_vcc *vcc);
 123 static void idt77252_close(struct atm_vcc *vcc);
 124 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
 125 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
 126                              int flags);
 127 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
 128                              unsigned long addr);
 129 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
 130 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
 131                                int flags);
 132 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
 133                               char *page);
 134 static void idt77252_softint(struct work_struct *work);
 135
 136
 137 static const struct atmdev_ops idt77252_ops =
 138 {
 139         .dev_close      = idt77252_dev_close,
 140         .open           = idt77252_open,
 141         .close          = idt77252_close,
 142         .send           = idt77252_send,
 143         .send_oam       = idt77252_send_oam,
 144         .phy_put        = idt77252_phy_put,
 145         .phy_get        = idt77252_phy_get,
 146         .change_qos     = idt77252_change_qos,
 147         .proc_read      = idt77252_proc_read,
 148         .owner          = THIS_MODULE
 149 };
 150
 151 static struct idt77252_dev *idt77252_chain = NULL;
 152 static unsigned int idt77252_sram_write_errors = 0;
 153
 154 /*****************************************************************************/
 155 /*                                                                           */
 156 /* I/O and Utility Bus                                                       */
 157 /*                                                                           */
 158 /*****************************************************************************/
 159
 160 static void
 161 waitfor_idle(struct idt77252_dev *card)
 162 {
 163         u32 stat;
 164
 165         stat = readl(SAR_REG_STAT);
 166         while (stat & SAR_STAT_CMDBZ)
 167                 stat = readl(SAR_REG_STAT);
 168 }
 169
 170 static u32
 171 read_sram(struct idt77252_dev *card, unsigned long addr)
 172 {
 173         unsigned long flags;
 174         u32 value;
 175
 176         spin_lock_irqsave(&card->cmd_lock, flags);
 177         writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
 178         waitfor_idle(card);
 179         value = readl(SAR_REG_DR0);
 180         spin_unlock_irqrestore(&card->cmd_lock, flags);
 181         return value;
 182 }
 183
 184 static void
 185 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
 186 {
 187         unsigned long flags;
 188
 189         if ((idt77252_sram_write_errors == 0) &&
 190             (((addr > card->tst[0] + card->tst_size - 2) &&
 191               (addr < card->tst[0] + card->tst_size)) ||
 192              ((addr > card->tst[1] + card->tst_size - 2) &&
 193               (addr < card->tst[1] + card->tst_size)))) {
 194                 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
 195                        card->name, addr, value);
 196         }
 197
 198         spin_lock_irqsave(&card->cmd_lock, flags);
 199         writel(value, SAR_REG_DR0);
 200         writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
 201         waitfor_idle(card);
 202         spin_unlock_irqrestore(&card->cmd_lock, flags);
 203 }
 204
 205 static u8
 206 read_utility(void *dev, unsigned long ubus_addr)
 207 {
 208         struct idt77252_dev *card = dev;
 209         unsigned long flags;
 210         u8 value;
 211
 212         if (!card) {
 213                 printk("Error: No such device.\n");
 214                 return -1;
 215         }
 216
 217         spin_lock_irqsave(&card->cmd_lock, flags);
 218         writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
 219         waitfor_idle(card);
 220         value = readl(SAR_REG_DR0);
 221         spin_unlock_irqrestore(&card->cmd_lock, flags);
 222         return value;
 223 }
 224
 225 static void
 226 write_utility(void *dev, unsigned long ubus_addr, u8 value)
 227 {
 228         struct idt77252_dev *card = dev;
 229         unsigned long flags;
 230
 231         if (!card) {
 232                 printk("Error: No such device.\n");
 233                 return;
 234         }
 235
 236         spin_lock_irqsave(&card->cmd_lock, flags);
 237         writel((u32) value, SAR_REG_DR0);
 238         writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
 239         waitfor_idle(card);
 240         spin_unlock_irqrestore(&card->cmd_lock, flags);
 241 }
 242
 243 #ifdef HAVE_EEPROM
 244 static u32 rdsrtab[] =
 245 {
 246         SAR_GP_EECS | SAR_GP_EESCLK,
 247         0,
 248         SAR_GP_EESCLK,                  /* 0 */
 249         0,
 250         SAR_GP_EESCLK,                  /* 0 */
 251         0,
 252         SAR_GP_EESCLK,                  /* 0 */
 253         0,
 254         SAR_GP_EESCLK,                  /* 0 */
 255         0,
 256         SAR_GP_EESCLK,                  /* 0 */
 257         SAR_GP_EEDO,
 258         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 259         0,
 260         SAR_GP_EESCLK,                  /* 0 */
 261         SAR_GP_EEDO,
 262         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 263 };
 264
 265 static u32 wrentab[] =
 266 {
 267         SAR_GP_EECS | SAR_GP_EESCLK,
 268         0,
 269         SAR_GP_EESCLK,                  /* 0 */
 270         0,
 271         SAR_GP_EESCLK,                  /* 0 */
 272         0,
 273         SAR_GP_EESCLK,                  /* 0 */
 274         0,
 275         SAR_GP_EESCLK,                  /* 0 */
 276         SAR_GP_EEDO,
 277         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 278         SAR_GP_EEDO,
 279         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 280         0,
 281         SAR_GP_EESCLK,                  /* 0 */
 282         0,
 283         SAR_GP_EESCLK                   /* 0 */
 284 };
 285
 286 static u32 rdtab[] =
 287 {
 288         SAR_GP_EECS | SAR_GP_EESCLK,
 289         0,
 290         SAR_GP_EESCLK,                  /* 0 */
 291         0,
 292         SAR_GP_EESCLK,                  /* 0 */
 293         0,
 294         SAR_GP_EESCLK,                  /* 0 */
 295         0,
 296         SAR_GP_EESCLK,                  /* 0 */
 297         0,
 298         SAR_GP_EESCLK,                  /* 0 */
 299         0,
 300         SAR_GP_EESCLK,                  /* 0 */
 301         SAR_GP_EEDO,
 302         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 303         SAR_GP_EEDO,
 304         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 305 };
 306
 307 static u32 wrtab[] =
 308 {
 309         SAR_GP_EECS | SAR_GP_EESCLK,
 310         0,
 311         SAR_GP_EESCLK,                  /* 0 */
 312         0,
 313         SAR_GP_EESCLK,                  /* 0 */
 314         0,
 315         SAR_GP_EESCLK,                  /* 0 */
 316         0,
 317         SAR_GP_EESCLK,                  /* 0 */
 318         0,
 319         SAR_GP_EESCLK,                  /* 0 */
 320         0,
 321         SAR_GP_EESCLK,                  /* 0 */
 322         SAR_GP_EEDO,
 323         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 324         0,
 325         SAR_GP_EESCLK                   /* 0 */
 326 };
 327
 328 static u32 clktab[] =
 329 {
 330         0,
 331         SAR_GP_EESCLK,
 332         0,
 333         SAR_GP_EESCLK,
 334         0,
 335         SAR_GP_EESCLK,
 336         0,
 337         SAR_GP_EESCLK,
 338         0,
 339         SAR_GP_EESCLK,
 340         0,
 341         SAR_GP_EESCLK,
 342         0,
 343         SAR_GP_EESCLK,
 344         0,
 345         SAR_GP_EESCLK,
 346         0
 347 };
 348
 349 static u32
 350 idt77252_read_gp(struct idt77252_dev *card)
 351 {
 352         u32 gp;
 353
 354         gp = readl(SAR_REG_GP);
 355 #if 0
 356         printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
 357 #endif
 358         return gp;
 359 }
 360
 361 static void
 362 idt77252_write_gp(struct idt77252_dev *card, u32 value)
 363 {
 364         unsigned long flags;
 365
 366 #if 0
 367         printk("WR: %s %s %s\n", value & SAR_GP_EECS ? "   " : "/CS",
 368                value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
 369                value & SAR_GP_EEDO   ? "1" : "0");
 370 #endif
 371
 372         spin_lock_irqsave(&card->cmd_lock, flags);
 373         waitfor_idle(card);
 374         writel(value, SAR_REG_GP);
 375         spin_unlock_irqrestore(&card->cmd_lock, flags);
 376 }
 377
 378 static u8
 379 idt77252_eeprom_read_status(struct idt77252_dev *card)
 380 {
 381         u8 byte;
 382         u32 gp;
 383         int i, j;
 384
 385         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 386
 387         for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
 388                 idt77252_write_gp(card, gp | rdsrtab[i]);
 389                 udelay(5);
 390         }
 391         idt77252_write_gp(card, gp | SAR_GP_EECS);
 392         udelay(5);
 393
 394         byte = 0;
 395         for (i = 0, j = 0; i < 8; i++) {
 396                 byte <<= 1;
 397
 398                 idt77252_write_gp(card, gp | clktab[j++]);
 399                 udelay(5);
 400
 401                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 402
 403                 idt77252_write_gp(card, gp | clktab[j++]);
 404                 udelay(5);
 405         }
 406         idt77252_write_gp(card, gp | SAR_GP_EECS);
 407         udelay(5);
 408
 409         return byte;
 410 }
 411
 412 static u8
 413 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
 414 {
 415         u8 byte;
 416         u32 gp;
 417         int i, j;
 418
 419         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 420
 421         for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
 422                 idt77252_write_gp(card, gp | rdtab[i]);
 423                 udelay(5);
 424         }
 425         idt77252_write_gp(card, gp | SAR_GP_EECS);
 426         udelay(5);
 427
 428         for (i = 0, j = 0; i < 8; i++) {
 429                 idt77252_write_gp(card, gp | clktab[j++] |
 430                                         (offset & 1 ? SAR_GP_EEDO : 0));
 431                 udelay(5);
 432
 433                 idt77252_write_gp(card, gp | clktab[j++] |
 434                                         (offset & 1 ? SAR_GP_EEDO : 0));
 435                 udelay(5);
 436
 437                 offset >>= 1;
 438         }
 439         idt77252_write_gp(card, gp | SAR_GP_EECS);
 440         udelay(5);
 441
 442         byte = 0;
 443         for (i = 0, j = 0; i < 8; i++) {
 444                 byte <<= 1;
 445
 446                 idt77252_write_gp(card, gp | clktab[j++]);
 447                 udelay(5);
 448
 449                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 450
 451                 idt77252_write_gp(card, gp | clktab[j++]);
 452                 udelay(5);
 453         }
 454         idt77252_write_gp(card, gp | SAR_GP_EECS);
 455         udelay(5);
 456
 457         return byte;
 458 }
 459
 460 static void
 461 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
 462 {
 463         u32 gp;
 464         int i, j;
 465
 466         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 467
 468         for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
 469                 idt77252_write_gp(card, gp | wrentab[i]);
 470                 udelay(5);
 471         }
 472         idt77252_write_gp(card, gp | SAR_GP_EECS);
 473         udelay(5);
 474
 475         for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
 476                 idt77252_write_gp(card, gp | wrtab[i]);
 477                 udelay(5);
 478         }
 479         idt77252_write_gp(card, gp | SAR_GP_EECS);
 480         udelay(5);
 481
 482         for (i = 0, j = 0; i < 8; i++) {
 483                 idt77252_write_gp(card, gp | clktab[j++] |
 484                                         (offset & 1 ? SAR_GP_EEDO : 0));
 485                 udelay(5);
 486
 487                 idt77252_write_gp(card, gp | clktab[j++] |
 488                                         (offset & 1 ? SAR_GP_EEDO : 0));
 489                 udelay(5);
 490
 491                 offset >>= 1;
 492         }
 493         idt77252_write_gp(card, gp | SAR_GP_EECS);
 494         udelay(5);
 495
 496         for (i = 0, j = 0; i < 8; i++) {
 497                 idt77252_write_gp(card, gp | clktab[j++] |
 498                                         (data & 1 ? SAR_GP_EEDO : 0));
 499                 udelay(5);
 500
 501                 idt77252_write_gp(card, gp | clktab[j++] |
 502                                         (data & 1 ? SAR_GP_EEDO : 0));
 503                 udelay(5);
 504
 505                 data >>= 1;
 506         }
 507         idt77252_write_gp(card, gp | SAR_GP_EECS);
 508         udelay(5);
 509 }
 510
 511 static void
 512 idt77252_eeprom_init(struct idt77252_dev *card)
 513 {
 514         u32 gp;
 515
 516         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 517
 518         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 519         udelay(5);
 520         idt77252_write_gp(card, gp | SAR_GP_EECS);
 521         udelay(5);
 522         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 523         udelay(5);
 524         idt77252_write_gp(card, gp | SAR_GP_EECS);
 525         udelay(5);
 526 }
 527 #endif /* HAVE_EEPROM */
 528
 529
 530 #ifdef CONFIG_ATM_IDT77252_DEBUG
 531 static void
 532 dump_tct(struct idt77252_dev *card, int index)
 533 {
 534         unsigned long tct;
 535         int i;
 536
 537         tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
 538
 539         printk("%s: TCT %x:", card->name, index);
 540         for (i = 0; i < 8; i++) {
 541                 printk(" %08x", read_sram(card, tct + i));
 542         }
 543         printk("\n");
 544 }
 545
 546 static void
 547 idt77252_tx_dump(struct idt77252_dev *card)
 548 {
 549         struct atm_vcc *vcc;
 550         struct vc_map *vc;
 551         int i;
 552
 553         printk("%s\n", __func__);
 554         for (i = 0; i < card->tct_size; i++) {
 555                 vc = card->vcs[i];
 556                 if (!vc)
 557                         continue;
 558
 559                 vcc = NULL;
 560                 if (vc->rx_vcc)
 561                         vcc = vc->rx_vcc;
 562                 else if (vc->tx_vcc)
 563                         vcc = vc->tx_vcc;
 564
 565                 if (!vcc)
 566                         continue;
 567
 568                 printk("%s: Connection %d:\n", card->name, vc->index);
 569                 dump_tct(card, vc->index);
 570         }
 571 }
 572 #endif
 573
 574
 575 /*****************************************************************************/
 576 /*                                                                           */
 577 /* SCQ Handling                                                              */
 578 /*                                                                           */
 579 /*****************************************************************************/
 580
 581 static int
 582 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
 583 {
 584         struct sb_pool *pool = &card->sbpool[queue];
 585         int index;
 586
 587         index = pool->index;
 588         while (pool->skb[index]) {
 589                 index = (index + 1) & FBQ_MASK;
 590                 if (index == pool->index)
 591                         return -ENOBUFS;
 592         }
 593
 594         pool->skb[index] = skb;
 595         IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
 596
 597         pool->index = (index + 1) & FBQ_MASK;
 598         return 0;
 599 }
 600
 601 static void
 602 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
 603 {
 604         unsigned int queue, index;
 605         u32 handle;
 606
 607         handle = IDT77252_PRV_POOL(skb);
 608
 609         queue = POOL_QUEUE(handle);
 610         if (queue > 3)
 611                 return;
 612
 613         index = POOL_INDEX(handle);
 614         if (index > FBQ_SIZE - 1)
 615                 return;
 616
 617         card->sbpool[queue].skb[index] = NULL;
 618 }
 619
 620 static struct sk_buff *
 621 sb_pool_skb(struct idt77252_dev *card, u32 handle)
 622 {
 623         unsigned int queue, index;
 624
 625         queue = POOL_QUEUE(handle);
 626         if (queue > 3)
 627                 return NULL;
 628
 629         index = POOL_INDEX(handle);
 630         if (index > FBQ_SIZE - 1)
 631                 return NULL;
 632
 633         return card->sbpool[queue].skb[index];
 634 }
 635
 636 static struct scq_info *
 637 alloc_scq(struct idt77252_dev *card, int class)
 638 {
 639         struct scq_info *scq;
 640
 641         scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
 642         if (!scq)
 643                 return NULL;
 644         scq->base = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE,
 645                                        &scq->paddr, GFP_KERNEL);
 646         if (scq->base == NULL) {
 647                 kfree(scq);
 648                 return NULL;
 649         }
 650
 651         scq->next = scq->base;
 652         scq->last = scq->base + (SCQ_ENTRIES - 1);
 653         atomic_set(&scq->used, 0);
 654
 655         spin_lock_init(&scq->lock);
 656         spin_lock_init(&scq->skblock);
 657
 658         skb_queue_head_init(&scq->transmit);
 659         skb_queue_head_init(&scq->pending);
 660
 661         TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
 662                  scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
 663
 664         return scq;
 665 }
 666
 667 static void
 668 free_scq(struct idt77252_dev *card, struct scq_info *scq)
 669 {
 670         struct sk_buff *skb;
 671         struct atm_vcc *vcc;
 672
 673         dma_free_coherent(&card->pcidev->dev, SCQ_SIZE,
 674                           scq->base, scq->paddr);
 675
 676         while ((skb = skb_dequeue(&scq->transmit))) {
 677                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
 678                                  skb->len, DMA_TO_DEVICE);
 679
 680                 vcc = ATM_SKB(skb)->vcc;
 681                 if (vcc->pop)
 682                         vcc->pop(vcc, skb);
 683                 else
 684                         dev_kfree_skb(skb);
 685         }
 686
 687         while ((skb = skb_dequeue(&scq->pending))) {
 688                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
 689                                  skb->len, DMA_TO_DEVICE);
 690
 691                 vcc = ATM_SKB(skb)->vcc;
 692                 if (vcc->pop)
 693                         vcc->pop(vcc, skb);
 694                 else
 695                         dev_kfree_skb(skb);
 696         }
 697
 698         kfree(scq);
 699 }
 700
 701
 702 static int
 703 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
 704 {
 705         struct scq_info *scq = vc->scq;
 706         unsigned long flags;
 707         struct scqe *tbd;
 708         int entries;
 709
 710         TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
 711
 712         atomic_inc(&scq->used);
 713         entries = atomic_read(&scq->used);
 714         if (entries > (SCQ_ENTRIES - 1)) {
 715                 atomic_dec(&scq->used);
 716                 goto out;
 717         }
 718
 719         skb_queue_tail(&scq->transmit, skb);
 720
 721         spin_lock_irqsave(&vc->lock, flags);
 722         if (vc->estimator) {
 723                 struct atm_vcc *vcc = vc->tx_vcc;
 724                 struct sock *sk = sk_atm(vcc);
 725
 726                 vc->estimator->cells += (skb->len + 47) / 48;
 727                 if (refcount_read(&sk->sk_wmem_alloc) >
 728                     (sk->sk_sndbuf >> 1)) {
 729                         u32 cps = vc->estimator->maxcps;
 730
 731                         vc->estimator->cps = cps;
 732                         vc->estimator->avcps = cps << 5;
 733                         if (vc->lacr < vc->init_er) {
 734                                 vc->lacr = vc->init_er;
 735                                 writel(TCMDQ_LACR | (vc->lacr << 16) |
 736                                        vc->index, SAR_REG_TCMDQ);
 737                         }
 738                 }
 739         }
 740         spin_unlock_irqrestore(&vc->lock, flags);
 741
 742         tbd = &IDT77252_PRV_TBD(skb);
 743
 744         spin_lock_irqsave(&scq->lock, flags);
 745         scq->next->word_1 = cpu_to_le32(tbd->word_1 |
 746                                         SAR_TBD_TSIF | SAR_TBD_GTSI);
 747         scq->next->word_2 = cpu_to_le32(tbd->word_2);
 748         scq->next->word_3 = cpu_to_le32(tbd->word_3);
 749         scq->next->word_4 = cpu_to_le32(tbd->word_4);
 750
 751         if (scq->next == scq->last)
 752                 scq->next = scq->base;
 753         else
 754                 scq->next++;
 755
 756         write_sram(card, scq->scd,
 757                    scq->paddr +
 758                    (u32)((unsigned long)scq->next - (unsigned long)scq->base));
 759         spin_unlock_irqrestore(&scq->lock, flags);
 760
 761         scq->trans_start = jiffies;
 762
 763         if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
 764                 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
 765                        SAR_REG_TCMDQ);
 766         }
 767
 768         TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
 769
 770         XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
 771                 card->name, atomic_read(&scq->used),
 772                 read_sram(card, scq->scd + 1), scq->next);
 773
 774         return 0;
 775
 776 out:
 777         if (time_after(jiffies, scq->trans_start + HZ)) {
 778                 printk("%s: Error pushing TBD for %d.%d\n",
 779                        card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
 780 #ifdef CONFIG_ATM_IDT77252_DEBUG
 781                 idt77252_tx_dump(card);
 782 #endif
 783                 scq->trans_start = jiffies;
 784         }
 785
 786         return -ENOBUFS;
 787 }
 788
 789
 790 static void
 791 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
 792 {
 793         struct scq_info *scq = vc->scq;
 794         struct sk_buff *skb;
 795         struct atm_vcc *vcc;
 796
 797         TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
 798                  card->name, atomic_read(&scq->used), scq->next);
 799
 800         skb = skb_dequeue(&scq->transmit);
 801         if (skb) {
 802                 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
 803
 804                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
 805                                  skb->len, DMA_TO_DEVICE);
 806
 807                 vcc = ATM_SKB(skb)->vcc;
 808
 809                 if (vcc->pop)
 810                         vcc->pop(vcc, skb);
 811                 else
 812                         dev_kfree_skb(skb);
 813
 814                 atomic_inc(&vcc->stats->tx);
 815         }
 816
 817         atomic_dec(&scq->used);
 818
 819         spin_lock(&scq->skblock);
 820         while ((skb = skb_dequeue(&scq->pending))) {
 821                 if (push_on_scq(card, vc, skb)) {
 822                         skb_queue_head(&vc->scq->pending, skb);
 823                         break;
 824                 }
 825         }
 826         spin_unlock(&scq->skblock);
 827 }
 828
 829 static int
 830 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
 831           struct sk_buff *skb, int oam)
 832 {
 833         struct atm_vcc *vcc;
 834         struct scqe *tbd;
 835         unsigned long flags;
 836         int error;
 837         int aal;
 838         u32 word4;
 839
 840         if (skb->len == 0) {
 841                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
 842                 return -EINVAL;
 843         }
 844
 845         TXPRINTK("%s: Sending %d bytes of data.\n",
 846                  card->name, skb->len);
 847
 848         tbd = &IDT77252_PRV_TBD(skb);
 849         vcc = ATM_SKB(skb)->vcc;
 850         word4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 851                         (skb->data[2] <<  8) | (skb->data[3] <<  0);
 852
 853         IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data,
 854                                                  skb->len, DMA_TO_DEVICE);
 855
 856         error = -EINVAL;
 857
 858         if (oam) {
 859                 if (skb->len != 52)
 860                         goto errout;
 861
 862                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
 863                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 864                 tbd->word_3 = 0x00000000;
 865                 tbd->word_4 = word4;
 866
 867                 if (test_bit(VCF_RSV, &vc->flags))
 868                         vc = card->vcs[0];
 869
 870                 goto done;
 871         }
 872
 873         if (test_bit(VCF_RSV, &vc->flags)) {
 874                 printk("%s: Trying to transmit on reserved VC\n", card->name);
 875                 goto errout;
 876         }
 877
 878         aal = vcc->qos.aal;
 879
 880         switch (aal) {
 881         case ATM_AAL0:
 882         case ATM_AAL34:
 883                 if (skb->len > 52)
 884                         goto errout;
 885
 886                 if (aal == ATM_AAL0)
 887                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
 888                                       ATM_CELL_PAYLOAD;
 889                 else
 890                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
 891                                       ATM_CELL_PAYLOAD;
 892
 893                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 894                 tbd->word_3 = 0x00000000;
 895                 tbd->word_4 = word4;
 896                 break;
 897
 898         case ATM_AAL5:
 899                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
 900                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
 901                 tbd->word_3 = skb->len;
 902                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
 903                               (vcc->vci << SAR_TBD_VCI_SHIFT);
 904                 break;
 905
 906         case ATM_AAL1:
 907         case ATM_AAL2:
 908         default:
 909                 printk("%s: Traffic type not supported.\n", card->name);
 910                 error = -EPROTONOSUPPORT;
 911                 goto errout;
 912         }
 913
 914 done:
 915         spin_lock_irqsave(&vc->scq->skblock, flags);
 916         skb_queue_tail(&vc->scq->pending, skb);
 917
 918         while ((skb = skb_dequeue(&vc->scq->pending))) {
 919                 if (push_on_scq(card, vc, skb)) {
 920                         skb_queue_head(&vc->scq->pending, skb);
 921                         break;
 922                 }
 923         }
 924         spin_unlock_irqrestore(&vc->scq->skblock, flags);
 925
 926         return 0;
 927
 928 errout:
 929         dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
 930                          skb->len, DMA_TO_DEVICE);
 931         return error;
 932 }
 933
 934 static unsigned long
 935 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
 936 {
 937         int i;
 938
 939         for (i = 0; i < card->scd_size; i++) {
 940                 if (!card->scd2vc[i]) {
 941                         card->scd2vc[i] = vc;
 942                         vc->scd_index = i;
 943                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
 944                 }
 945         }
 946         return 0;
 947 }
 948
 949 static void
 950 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 951 {
 952         write_sram(card, scq->scd, scq->paddr);
 953         write_sram(card, scq->scd + 1, 0x00000000);
 954         write_sram(card, scq->scd + 2, 0xffffffff);
 955         write_sram(card, scq->scd + 3, 0x00000000);
 956 }
 957
 958 static void
 959 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 960 {
 961         return;
 962 }
 963
 964 /*****************************************************************************/
 965 /*                                                                           */
 966 /* RSQ Handling                                                              */
 967 /*                                                                           */
 968 /*****************************************************************************/
 969
 970 static int
 971 init_rsq(struct idt77252_dev *card)
 972 {
 973         struct rsq_entry *rsqe;
 974
 975         card->rsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
 976                                             &card->rsq.paddr, GFP_KERNEL);
 977         if (card->rsq.base == NULL) {
 978                 printk("%s: can't allocate RSQ.\n", card->name);
 979                 return -1;
 980         }
 981
 982         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
 983         card->rsq.next = card->rsq.last;
 984         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
 985                 rsqe->word_4 = 0;
 986
 987         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
 988                SAR_REG_RSQH);
 989         writel(card->rsq.paddr, SAR_REG_RSQB);
 990
 991         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
 992                 (unsigned long) card->rsq.base,
 993                 readl(SAR_REG_RSQB));
 994         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
 995                 card->name,
 996                 readl(SAR_REG_RSQH),
 997                 readl(SAR_REG_RSQB),
 998                 readl(SAR_REG_RSQT));
 999
1000         return 0;
1001 }
1002
1003 static void
1004 deinit_rsq(struct idt77252_dev *card)
1005 {
1006         dma_free_coherent(&card->pcidev->dev, RSQSIZE,
1007                           card->rsq.base, card->rsq.paddr);
1008 }
1009
1010 static void
1011 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1012 {
1013         struct atm_vcc *vcc;
1014         struct sk_buff *skb;
1015         struct rx_pool *rpp;
1016         struct vc_map *vc;
1017         u32 header, vpi, vci;
1018         u32 stat;
1019         int i;
1020
1021         stat = le32_to_cpu(rsqe->word_4);
1022
1023         if (stat & SAR_RSQE_IDLE) {
1024                 RXPRINTK("%s: message about inactive connection.\n",
1025                          card->name);
1026                 return;
1027         }
1028
1029         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1030         if (skb == NULL) {
1031                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1032                        card->name, __func__,
1033                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1034                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1035                 return;
1036         }
1037
1038         header = le32_to_cpu(rsqe->word_1);
1039         vpi = (header >> 16) & 0x00ff;
1040         vci = (header >>  0) & 0xffff;
1041
1042         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1043                  card->name, vpi, vci, skb, skb->data);
1044
1045         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1046                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1047                        card->name, vpi, vci);
1048                 recycle_rx_skb(card, skb);
1049                 return;
1050         }
1051
1052         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1053         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1054                 printk("%s: SDU received on non RX vc %u.%u\n",
1055                        card->name, vpi, vci);
1056                 recycle_rx_skb(card, skb);
1057                 return;
1058         }
1059
1060         vcc = vc->rx_vcc;
1061
1062         dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1063                                 skb_end_pointer(skb) - skb->data,
1064                                 DMA_FROM_DEVICE);
1065
1066         if ((vcc->qos.aal == ATM_AAL0) ||
1067             (vcc->qos.aal == ATM_AAL34)) {
1068                 struct sk_buff *sb;
1069                 unsigned char *cell;
1070                 u32 aal0;
1071
1072                 cell = skb->data;
1073                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1074                         if ((sb = dev_alloc_skb(64)) == NULL) {
1075                                 printk("%s: Can't allocate buffers for aal0.\n",
1076                                        card->name);
1077                                 atomic_add(i, &vcc->stats->rx_drop);
1078                                 break;
1079                         }
1080                         if (!atm_charge(vcc, sb->truesize)) {
1081                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1082                                          card->name);
1083                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1084                                 dev_kfree_skb(sb);
1085                                 break;
1086                         }
1087                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1088                                (vci << ATM_HDR_VCI_SHIFT);
1089                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1090                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1091
1092                         *((u32 *) sb->data) = aal0;
1093                         skb_put(sb, sizeof(u32));
1094                         skb_put_data(sb, cell, ATM_CELL_PAYLOAD);
1095
1096                         ATM_SKB(sb)->vcc = vcc;
1097                         __net_timestamp(sb);
1098                         vcc->push(vcc, sb);
1099                         atomic_inc(&vcc->stats->rx);
1100
1101                         cell += ATM_CELL_PAYLOAD;
1102                 }
1103
1104                 recycle_rx_skb(card, skb);
1105                 return;
1106         }
1107         if (vcc->qos.aal != ATM_AAL5) {
1108                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1109                        card->name, vcc->qos.aal);
1110                 recycle_rx_skb(card, skb);
1111                 return;
1112         }
1113         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1114
1115         rpp = &vc->rcv.rx_pool;
1116
1117         __skb_queue_tail(&rpp->queue, skb);
1118         rpp->len += skb->len;
1119
1120         if (stat & SAR_RSQE_EPDU) {
1121                 unsigned char *l1l2;
1122                 unsigned int len;
1123
1124                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1125
1126                 len = (l1l2[0] << 8) | l1l2[1];
1127                 len = len ? len : 0x10000;
1128
1129                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1130
1131                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1132                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1133                                  "(CDC: %08x)\n",
1134                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1135                         recycle_rx_pool_skb(card, rpp);
1136                         atomic_inc(&vcc->stats->rx_err);
1137                         return;
1138                 }
1139                 if (stat & SAR_RSQE_CRC) {
1140                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1141                         recycle_rx_pool_skb(card, rpp);
1142                         atomic_inc(&vcc->stats->rx_err);
1143                         return;
1144                 }
1145                 if (skb_queue_len(&rpp->queue) > 1) {
1146                         struct sk_buff *sb;
1147
1148                         skb = dev_alloc_skb(rpp->len);
1149                         if (!skb) {
1150                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1151                                          card->name);
1152                                 recycle_rx_pool_skb(card, rpp);
1153                                 atomic_inc(&vcc->stats->rx_err);
1154                                 return;
1155                         }
1156                         if (!atm_charge(vcc, skb->truesize)) {
1157                                 recycle_rx_pool_skb(card, rpp);
1158                                 dev_kfree_skb(skb);
1159                                 return;
1160                         }
1161                         skb_queue_walk(&rpp->queue, sb)
1162                                 skb_put_data(skb, sb->data, sb->len);
1163
1164                         recycle_rx_pool_skb(card, rpp);
1165
1166                         skb_trim(skb, len);
1167                         ATM_SKB(skb)->vcc = vcc;
1168                         __net_timestamp(skb);
1169
1170                         vcc->push(vcc, skb);
1171                         atomic_inc(&vcc->stats->rx);
1172
1173                         return;
1174                 }
1175
1176                 flush_rx_pool(card, rpp);
1177
1178                 if (!atm_charge(vcc, skb->truesize)) {
1179                         recycle_rx_skb(card, skb);
1180                         return;
1181                 }
1182
1183                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1184                                  skb_end_pointer(skb) - skb->data,
1185                                  DMA_FROM_DEVICE);
1186                 sb_pool_remove(card, skb);
1187
1188                 skb_trim(skb, len);
1189                 ATM_SKB(skb)->vcc = vcc;
1190                 __net_timestamp(skb);
1191
1192                 vcc->push(vcc, skb);
1193                 atomic_inc(&vcc->stats->rx);
1194
1195                 if (skb->truesize > SAR_FB_SIZE_3)
1196                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1197                 else if (skb->truesize > SAR_FB_SIZE_2)
1198                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1199                 else if (skb->truesize > SAR_FB_SIZE_1)
1200                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1201                 else
1202                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1203                 return;
1204         }
1205 }
1206
1207 static void
1208 idt77252_rx(struct idt77252_dev *card)
1209 {
1210         struct rsq_entry *rsqe;
1211
1212         if (card->rsq.next == card->rsq.last)
1213                 rsqe = card->rsq.base;
1214         else
1215                 rsqe = card->rsq.next + 1;
1216
1217         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1218                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1219                 return;
1220         }
1221
1222         do {
1223                 dequeue_rx(card, rsqe);
1224                 rsqe->word_4 = 0;
1225                 card->rsq.next = rsqe;
1226                 if (card->rsq.next == card->rsq.last)
1227                         rsqe = card->rsq.base;
1228                 else
1229                         rsqe = card->rsq.next + 1;
1230         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1231
1232         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1233                SAR_REG_RSQH);
1234 }
1235
1236 static void
1237 idt77252_rx_raw(struct idt77252_dev *card)
1238 {
1239         struct sk_buff  *queue;
1240         u32             head, tail;
1241         struct atm_vcc  *vcc;
1242         struct vc_map   *vc;
1243         struct sk_buff  *sb;
1244
1245         if (card->raw_cell_head == NULL) {
1246                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1247                 card->raw_cell_head = sb_pool_skb(card, handle);
1248         }
1249
1250         queue = card->raw_cell_head;
1251         if (!queue)
1252                 return;
1253
1254         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1255         tail = readl(SAR_REG_RAWCT);
1256
1257         dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue),
1258                                 skb_end_offset(queue) - 16,
1259                                 DMA_FROM_DEVICE);
1260
1261         while (head != tail) {
1262                 unsigned int vpi, vci;
1263                 u32 header;
1264
1265                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1266
1267                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1268                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1269
1270 #ifdef CONFIG_ATM_IDT77252_DEBUG
1271                 if (debug & DBG_RAW_CELL) {
1272                         int i;
1273
1274                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1275                                card->name, (header >> 28) & 0x000f,
1276                                (header >> 20) & 0x00ff,
1277                                (header >>  4) & 0xffff,
1278                                (header >>  1) & 0x0007,
1279                                (header >>  0) & 0x0001);
1280                         for (i = 16; i < 64; i++)
1281                                 printk(" %02x", queue->data[i]);
1282                         printk("\n");
1283                 }
1284 #endif
1285
1286                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1287                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1288                                 card->name, vpi, vci);
1289                         goto drop;
1290                 }
1291
1292                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1293                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1294                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1295                                 card->name, vpi, vci);
1296                         goto drop;
1297                 }
1298
1299                 vcc = vc->rx_vcc;
1300
1301                 if (vcc->qos.aal != ATM_AAL0) {
1302                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1303                                 card->name, vpi, vci);
1304                         atomic_inc(&vcc->stats->rx_drop);
1305                         goto drop;
1306                 }
1307
1308                 if ((sb = dev_alloc_skb(64)) == NULL) {
1309                         printk("%s: Can't allocate buffers for AAL0.\n",
1310                                card->name);
1311                         atomic_inc(&vcc->stats->rx_err);
1312                         goto drop;
1313                 }
1314
1315                 if (!atm_charge(vcc, sb->truesize)) {
1316                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1317                                  card->name);
1318                         dev_kfree_skb(sb);
1319                         goto drop;
1320                 }
1321
1322                 *((u32 *) sb->data) = header;
1323                 skb_put(sb, sizeof(u32));
1324                 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD);
1325
1326                 ATM_SKB(sb)->vcc = vcc;
1327                 __net_timestamp(sb);
1328                 vcc->push(vcc, sb);
1329                 atomic_inc(&vcc->stats->rx);
1330
1331 drop:
1332                 skb_pull(queue, 64);
1333
1334                 head = IDT77252_PRV_PADDR(queue)
1335                                         + (queue->data - queue->head - 16);
1336
1337                 if (queue->len < 128) {
1338                         struct sk_buff *next;
1339                         u32 handle;
1340
1341                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1342                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1343
1344                         next = sb_pool_skb(card, handle);
1345                         recycle_rx_skb(card, queue);
1346
1347                         if (next) {
1348                                 card->raw_cell_head = next;
1349                                 queue = card->raw_cell_head;
1350                                 dma_sync_single_for_cpu(&card->pcidev->dev,
1351                                                         IDT77252_PRV_PADDR(queue),
1352                                                         (skb_end_pointer(queue) -
1353                                                          queue->data),
1354                                                         DMA_FROM_DEVICE);
1355                         } else {
1356                                 card->raw_cell_head = NULL;
1357                                 printk("%s: raw cell queue overrun\n",
1358                                        card->name);
1359                                 break;
1360                         }
1361                 }
1362         }
1363 }
1364
1365
1366 /*****************************************************************************/
1367 /*                                                                           */
1368 /* TSQ Handling                                                              */
1369 /*                                                                           */
1370 /*****************************************************************************/
1371
1372 static int
1373 init_tsq(struct idt77252_dev *card)
1374 {
1375         struct tsq_entry *tsqe;
1376
1377         card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
1378                                             &card->tsq.paddr, GFP_KERNEL);
1379         if (card->tsq.base == NULL) {
1380                 printk("%s: can't allocate TSQ.\n", card->name);
1381                 return -1;
1382         }
1383
1384         card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1385         card->tsq.next = card->tsq.last;
1386         for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1387                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1388
1389         writel(card->tsq.paddr, SAR_REG_TSQB);
1390         writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1391                SAR_REG_TSQH);
1392
1393         return 0;
1394 }
1395
1396 static void
1397 deinit_tsq(struct idt77252_dev *card)
1398 {
1399         dma_free_coherent(&card->pcidev->dev, TSQSIZE,
1400                           card->tsq.base, card->tsq.paddr);
1401 }
1402
1403 static void
1404 idt77252_tx(struct idt77252_dev *card)
1405 {
1406         struct tsq_entry *tsqe;
1407         unsigned int vpi, vci;
1408         struct vc_map *vc;
1409         u32 conn, stat;
1410
1411         if (card->tsq.next == card->tsq.last)
1412                 tsqe = card->tsq.base;
1413         else
1414                 tsqe = card->tsq.next + 1;
1415
1416         TXPRINTK("idt77252_tx: tsq  %p: base %p, next %p, last %p\n", tsqe,
1417                  card->tsq.base, card->tsq.next, card->tsq.last);
1418         TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1419                  readl(SAR_REG_TSQB),
1420                  readl(SAR_REG_TSQT),
1421                  readl(SAR_REG_TSQH));
1422
1423         stat = le32_to_cpu(tsqe->word_2);
1424
1425         if (stat & SAR_TSQE_INVALID)
1426                 return;
1427
1428         do {
1429                 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1430                          le32_to_cpu(tsqe->word_1),
1431                          le32_to_cpu(tsqe->word_2));
1432
1433                 switch (stat & SAR_TSQE_TYPE) {
1434                 case SAR_TSQE_TYPE_TIMER:
1435                         TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1436                         break;
1437
1438                 case SAR_TSQE_TYPE_IDLE:
1439
1440                         conn = le32_to_cpu(tsqe->word_1);
1441
1442                         if (SAR_TSQE_TAG(stat) == 0x10) {
1443 #ifdef  NOTDEF
1444                                 printk("%s: Connection %d halted.\n",
1445                                        card->name,
1446                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1447 #endif
1448                                 break;
1449                         }
1450
1451                         vc = card->vcs[conn & 0x1fff];
1452                         if (!vc) {
1453                                 printk("%s: could not find VC from conn %d\n",
1454                                        card->name, conn & 0x1fff);
1455                                 break;
1456                         }
1457
1458                         printk("%s: Connection %d IDLE.\n",
1459                                card->name, vc->index);
1460
1461                         set_bit(VCF_IDLE, &vc->flags);
1462                         break;
1463
1464                 case SAR_TSQE_TYPE_TSR:
1465
1466                         conn = le32_to_cpu(tsqe->word_1);
1467
1468                         vc = card->vcs[conn & 0x1fff];
1469                         if (!vc) {
1470                                 printk("%s: no VC at index %d\n",
1471                                        card->name,
1472                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1473                                 break;
1474                         }
1475
1476                         drain_scq(card, vc);
1477                         break;
1478
1479                 case SAR_TSQE_TYPE_TBD_COMP:
1480
1481                         conn = le32_to_cpu(tsqe->word_1);
1482
1483                         vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1484                         vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1485
1486                         if (vpi >= (1 << card->vpibits) ||
1487                             vci >= (1 << card->vcibits)) {
1488                                 printk("%s: TBD complete: "
1489                                        "out of range VPI.VCI %u.%u\n",
1490                                        card->name, vpi, vci);
1491                                 break;
1492                         }
1493
1494                         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1495                         if (!vc) {
1496                                 printk("%s: TBD complete: "
1497                                        "no VC at VPI.VCI %u.%u\n",
1498                                        card->name, vpi, vci);
1499                                 break;
1500                         }
1501
1502                         drain_scq(card, vc);
1503                         break;
1504                 }
1505
1506                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1507
1508                 card->tsq.next = tsqe;
1509                 if (card->tsq.next == card->tsq.last)
1510                         tsqe = card->tsq.base;
1511                 else
1512                         tsqe = card->tsq.next + 1;
1513
1514                 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1515                          card->tsq.base, card->tsq.next, card->tsq.last);
1516
1517                 stat = le32_to_cpu(tsqe->word_2);
1518
1519         } while (!(stat & SAR_TSQE_INVALID));
1520
1521         writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1522                SAR_REG_TSQH);
1523
1524         XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1525                 card->index, readl(SAR_REG_TSQH),
1526                 readl(SAR_REG_TSQT), card->tsq.next);
1527 }
1528
1529
1530 static void
1531 tst_timer(struct timer_list *t)
1532 {
1533         struct idt77252_dev *card = from_timer(card, t, tst_timer);
1534         unsigned long base, idle, jump;
1535         unsigned long flags;
1536         u32 pc;
1537         int e;
1538
1539         spin_lock_irqsave(&card->tst_lock, flags);
1540
1541         base = card->tst[card->tst_index];
1542         idle = card->tst[card->tst_index ^ 1];
1543
1544         if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1545                 jump = base + card->tst_size - 2;
1546
1547                 pc = readl(SAR_REG_NOW) >> 2;
1548                 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1549                         mod_timer(&card->tst_timer, jiffies + 1);
1550                         goto out;
1551                 }
1552
1553                 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1554
1555                 card->tst_index ^= 1;
1556                 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1557
1558                 base = card->tst[card->tst_index];
1559                 idle = card->tst[card->tst_index ^ 1];
1560
1561                 for (e = 0; e < card->tst_size - 2; e++) {
1562                         if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1563                                 write_sram(card, idle + e,
1564                                            card->soft_tst[e].tste & TSTE_MASK);
1565                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1566                         }
1567                 }
1568         }
1569
1570         if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1571
1572                 for (e = 0; e < card->tst_size - 2; e++) {
1573                         if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1574                                 write_sram(card, idle + e,
1575                                            card->soft_tst[e].tste & TSTE_MASK);
1576                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1577                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1578                         }
1579                 }
1580
1581                 jump = base + card->tst_size - 2;
1582
1583                 write_sram(card, jump, TSTE_OPC_NULL);
1584                 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1585
1586                 mod_timer(&card->tst_timer, jiffies + 1);
1587         }
1588
1589 out:
1590         spin_unlock_irqrestore(&card->tst_lock, flags);
1591 }
1592
1593 static int
1594 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1595            int n, unsigned int opc)
1596 {
1597         unsigned long cl, avail;
1598         unsigned long idle;
1599         int e, r;
1600         u32 data;
1601
1602         avail = card->tst_size - 2;
1603         for (e = 0; e < avail; e++) {
1604                 if (card->soft_tst[e].vc == NULL)
1605                         break;
1606         }
1607         if (e >= avail) {
1608                 printk("%s: No free TST entries found\n", card->name);
1609                 return -1;
1610         }
1611
1612         NPRINTK("%s: conn %d: first TST entry at %d.\n",
1613                 card->name, vc ? vc->index : -1, e);
1614
1615         r = n;
1616         cl = avail;
1617         data = opc & TSTE_OPC_MASK;
1618         if (vc && (opc != TSTE_OPC_NULL))
1619                 data = opc | vc->index;
1620
1621         idle = card->tst[card->tst_index ^ 1];
1622
1623         /*
1624          * Fill Soft TST.
1625          */
1626         while (r > 0) {
1627                 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1628                         if (vc)
1629                                 card->soft_tst[e].vc = vc;
1630                         else
1631                                 card->soft_tst[e].vc = (void *)-1;
1632
1633                         card->soft_tst[e].tste = data;
1634                         if (timer_pending(&card->tst_timer))
1635                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1636                         else {
1637                                 write_sram(card, idle + e, data);
1638                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1639                         }
1640
1641                         cl -= card->tst_size;
1642                         r--;
1643                 }
1644
1645                 if (++e == avail)
1646                         e = 0;
1647                 cl += n;
1648         }
1649
1650         return 0;
1651 }
1652
1653 static int
1654 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1655 {
1656         unsigned long flags;
1657         int res;
1658
1659         spin_lock_irqsave(&card->tst_lock, flags);
1660
1661         res = __fill_tst(card, vc, n, opc);
1662
1663         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1664         if (!timer_pending(&card->tst_timer))
1665                 mod_timer(&card->tst_timer, jiffies + 1);
1666
1667         spin_unlock_irqrestore(&card->tst_lock, flags);
1668         return res;
1669 }
1670
1671 static int
1672 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1673 {
1674         unsigned long idle;
1675         int e;
1676
1677         idle = card->tst[card->tst_index ^ 1];
1678
1679         for (e = 0; e < card->tst_size - 2; e++) {
1680                 if (card->soft_tst[e].vc == vc) {
1681                         card->soft_tst[e].vc = NULL;
1682
1683                         card->soft_tst[e].tste = TSTE_OPC_VAR;
1684                         if (timer_pending(&card->tst_timer))
1685                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1686                         else {
1687                                 write_sram(card, idle + e, TSTE_OPC_VAR);
1688                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1689                         }
1690                 }
1691         }
1692
1693         return 0;
1694 }
1695
1696 static int
1697 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1698 {
1699         unsigned long flags;
1700         int res;
1701
1702         spin_lock_irqsave(&card->tst_lock, flags);
1703
1704         res = __clear_tst(card, vc);
1705
1706         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1707         if (!timer_pending(&card->tst_timer))
1708                 mod_timer(&card->tst_timer, jiffies + 1);
1709
1710         spin_unlock_irqrestore(&card->tst_lock, flags);
1711         return res;
1712 }
1713
1714 static int
1715 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1716            int n, unsigned int opc)
1717 {
1718         unsigned long flags;
1719         int res;
1720
1721         spin_lock_irqsave(&card->tst_lock, flags);
1722
1723         __clear_tst(card, vc);
1724         res = __fill_tst(card, vc, n, opc);
1725
1726         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1727         if (!timer_pending(&card->tst_timer))
1728                 mod_timer(&card->tst_timer, jiffies + 1);
1729
1730         spin_unlock_irqrestore(&card->tst_lock, flags);
1731         return res;
1732 }
1733
1734
1735 static int
1736 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1737 {
1738         unsigned long tct;
1739
1740         tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1741
1742         switch (vc->class) {
1743         case SCHED_CBR:
1744                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1745                         card->name, tct, vc->scq->scd);
1746
1747                 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1748                 write_sram(card, tct + 1, 0);
1749                 write_sram(card, tct + 2, 0);
1750                 write_sram(card, tct + 3, 0);
1751                 write_sram(card, tct + 4, 0);
1752                 write_sram(card, tct + 5, 0);
1753                 write_sram(card, tct + 6, 0);
1754                 write_sram(card, tct + 7, 0);
1755                 break;
1756
1757         case SCHED_UBR:
1758                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1759                         card->name, tct, vc->scq->scd);
1760
1761                 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1762                 write_sram(card, tct + 1, 0);
1763                 write_sram(card, tct + 2, TCT_TSIF);
1764                 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1765                 write_sram(card, tct + 4, 0);
1766                 write_sram(card, tct + 5, vc->init_er);
1767                 write_sram(card, tct + 6, 0);
1768                 write_sram(card, tct + 7, TCT_FLAG_UBR);
1769                 break;
1770
1771         case SCHED_VBR:
1772         case SCHED_ABR:
1773         default:
1774                 return -ENOSYS;
1775         }
1776
1777         return 0;
1778 }
1779
1780 /*****************************************************************************/
1781 /*                                                                           */
1782 /* FBQ Handling                                                              */
1783 /*                                                                           */
1784 /*****************************************************************************/
1785
1786 static __inline__ int
1787 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1788 {
1789         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1790 }
1791
1792 static int
1793 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1794 {
1795         unsigned long flags;
1796         u32 handle;
1797         u32 addr;
1798
1799         skb->data = skb->head;
1800         skb_reset_tail_pointer(skb);
1801         skb->len = 0;
1802
1803         skb_reserve(skb, 16);
1804
1805         switch (queue) {
1806         case 0:
1807                 skb_put(skb, SAR_FB_SIZE_0);
1808                 break;
1809         case 1:
1810                 skb_put(skb, SAR_FB_SIZE_1);
1811                 break;
1812         case 2:
1813                 skb_put(skb, SAR_FB_SIZE_2);
1814                 break;
1815         case 3:
1816                 skb_put(skb, SAR_FB_SIZE_3);
1817                 break;
1818         default:
1819                 return -1;
1820         }
1821
1822         if (idt77252_fbq_full(card, queue))
1823                 return -1;
1824
1825         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1826
1827         handle = IDT77252_PRV_POOL(skb);
1828         addr = IDT77252_PRV_PADDR(skb);
1829
1830         spin_lock_irqsave(&card->cmd_lock, flags);
1831         writel(handle, card->fbq[queue]);
1832         writel(addr, card->fbq[queue]);
1833         spin_unlock_irqrestore(&card->cmd_lock, flags);
1834
1835         return 0;
1836 }
1837
1838 static void
1839 add_rx_skb(struct idt77252_dev *card, int queue,
1840            unsigned int size, unsigned int count)
1841 {
1842         struct sk_buff *skb;
1843         dma_addr_t paddr;
1844         u32 handle;
1845
1846         while (count--) {
1847                 skb = dev_alloc_skb(size);
1848                 if (!skb)
1849                         return;
1850
1851                 if (sb_pool_add(card, skb, queue)) {
1852                         printk("%s: SB POOL full\n", __func__);
1853                         goto outfree;
1854                 }
1855
1856                 paddr = dma_map_single(&card->pcidev->dev, skb->data,
1857                                        skb_end_pointer(skb) - skb->data,
1858                                        DMA_FROM_DEVICE);
1859                 IDT77252_PRV_PADDR(skb) = paddr;
1860
1861                 if (push_rx_skb(card, skb, queue)) {
1862                         printk("%s: FB QUEUE full\n", __func__);
1863                         goto outunmap;
1864                 }
1865         }
1866
1867         return;
1868
1869 outunmap:
1870         dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1871                          skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE);
1872
1873         handle = IDT77252_PRV_POOL(skb);
1874         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1875
1876 outfree:
1877         dev_kfree_skb(skb);
1878 }
1879
1880
1881 static void
1882 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1883 {
1884         u32 handle = IDT77252_PRV_POOL(skb);
1885         int err;
1886
1887         dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1888                                    skb_end_pointer(skb) - skb->data,
1889                                    DMA_FROM_DEVICE);
1890
1891         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1892         if (err) {
1893                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1894                                  skb_end_pointer(skb) - skb->data,
1895                                  DMA_FROM_DEVICE);
1896                 sb_pool_remove(card, skb);
1897                 dev_kfree_skb(skb);
1898         }
1899 }
1900
1901 static void
1902 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1903 {
1904         skb_queue_head_init(&rpp->queue);
1905         rpp->len = 0;
1906 }
1907
1908 static void
1909 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1910 {
1911         struct sk_buff *skb, *tmp;
1912
1913         skb_queue_walk_safe(&rpp->queue, skb, tmp)
1914                 recycle_rx_skb(card, skb);
1915
1916         flush_rx_pool(card, rpp);
1917 }
1918
1919 /*****************************************************************************/
1920 /*                                                                           */
1921 /* ATM Interface                                                             */
1922 /*                                                                           */
1923 /*****************************************************************************/
1924
1925 static void
1926 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1927 {
1928         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1929 }
1930
1931 static unsigned char
1932 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1933 {
1934         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1935 }
1936
1937 static inline int
1938 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1939 {
1940         struct atm_dev *dev = vcc->dev;
1941         struct idt77252_dev *card = dev->dev_data;
1942         struct vc_map *vc = vcc->dev_data;
1943         int err;
1944
1945         if (vc == NULL) {
1946                 printk("%s: NULL connection in send().\n", card->name);
1947                 atomic_inc(&vcc->stats->tx_err);
1948                 dev_kfree_skb(skb);
1949                 return -EINVAL;
1950         }
1951         if (!test_bit(VCF_TX, &vc->flags)) {
1952                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1953                 atomic_inc(&vcc->stats->tx_err);
1954                 dev_kfree_skb(skb);
1955                 return -EINVAL;
1956         }
1957
1958         switch (vcc->qos.aal) {
1959         case ATM_AAL0:
1960         case ATM_AAL1:
1961         case ATM_AAL5:
1962                 break;
1963         default:
1964                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1965                 atomic_inc(&vcc->stats->tx_err);
1966                 dev_kfree_skb(skb);
1967                 return -EINVAL;
1968         }
1969
1970         if (skb_shinfo(skb)->nr_frags != 0) {
1971                 printk("%s: No scatter-gather yet.\n", card->name);
1972                 atomic_inc(&vcc->stats->tx_err);
1973                 dev_kfree_skb(skb);
1974                 return -EINVAL;
1975         }
1976         ATM_SKB(skb)->vcc = vcc;
1977
1978         err = queue_skb(card, vc, skb, oam);
1979         if (err) {
1980                 atomic_inc(&vcc->stats->tx_err);
1981                 dev_kfree_skb(skb);
1982                 return err;
1983         }
1984
1985         return 0;
1986 }
1987
1988 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1989 {
1990         return idt77252_send_skb(vcc, skb, 0);
1991 }
1992
1993 static int
1994 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
1995 {
1996         struct atm_dev *dev = vcc->dev;
1997         struct idt77252_dev *card = dev->dev_data;
1998         struct sk_buff *skb;
1999
2000         skb = dev_alloc_skb(64);
2001         if (!skb) {
2002                 printk("%s: Out of memory in send_oam().\n", card->name);
2003                 atomic_inc(&vcc->stats->tx_err);
2004                 return -ENOMEM;
2005         }
2006         refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2007
2008         skb_put_data(skb, cell, 52);
2009
2010         return idt77252_send_skb(vcc, skb, 1);
2011 }
2012
2013 static __inline__ unsigned int
2014 idt77252_fls(unsigned int x)
2015 {
2016         int r = 1;
2017
2018         if (x == 0)
2019                 return 0;
2020         if (x & 0xffff0000) {
2021                 x >>= 16;
2022                 r += 16;
2023         }
2024         if (x & 0xff00) {
2025                 x >>= 8;
2026                 r += 8;
2027         }
2028         if (x & 0xf0) {
2029                 x >>= 4;
2030                 r += 4;
2031         }
2032         if (x & 0xc) {
2033                 x >>= 2;
2034                 r += 2;
2035         }
2036         if (x & 0x2)
2037                 r += 1;
2038         return r;
2039 }
2040
2041 static u16
2042 idt77252_int_to_atmfp(unsigned int rate)
2043 {
2044         u16 m, e;
2045
2046         if (rate == 0)
2047                 return 0;
2048         e = idt77252_fls(rate) - 1;
2049         if (e < 9)
2050                 m = (rate - (1 << e)) << (9 - e);
2051         else if (e == 9)
2052                 m = (rate - (1 << e));
2053         else /* e > 9 */
2054                 m = (rate - (1 << e)) >> (e - 9);
2055         return 0x4000 | (e << 9) | m;
2056 }
2057
2058 static u8
2059 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2060 {
2061         u16 afp;
2062
2063         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2064         if (pcr < 0)
2065                 return rate_to_log[(afp >> 5) & 0x1ff];
2066         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2067 }
2068
2069 static void
2070 idt77252_est_timer(struct timer_list *t)
2071 {
2072         struct rate_estimator *est = from_timer(est, t, timer);
2073         struct vc_map *vc = est->vc;
2074         struct idt77252_dev *card = vc->card;
2075         unsigned long flags;
2076         u32 rate, cps;
2077         u64 ncells;
2078         u8 lacr;
2079
2080         spin_lock_irqsave(&vc->lock, flags);
2081         if (!vc->estimator)
2082                 goto out;
2083         ncells = est->cells;
2084
2085         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2086         est->last_cells = ncells;
2087         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2088         est->cps = (est->avcps + 0x1f) >> 5;
2089
2090         cps = est->cps;
2091         if (cps < (est->maxcps >> 4))
2092                 cps = est->maxcps >> 4;
2093
2094         lacr = idt77252_rate_logindex(card, cps);
2095         if (lacr > vc->max_er)
2096                 lacr = vc->max_er;
2097
2098         if (lacr != vc->lacr) {
2099                 vc->lacr = lacr;
2100                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2101         }
2102
2103         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2104         add_timer(&est->timer);
2105
2106 out:
2107         spin_unlock_irqrestore(&vc->lock, flags);
2108 }
2109
2110 static struct rate_estimator *
2111 idt77252_init_est(struct vc_map *vc, int pcr)
2112 {
2113         struct rate_estimator *est;
2114
2115         est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2116         if (!est)
2117                 return NULL;
2118         est->maxcps = pcr < 0 ? -pcr : pcr;
2119         est->cps = est->maxcps;
2120         est->avcps = est->cps << 5;
2121         est->vc = vc;
2122
2123         est->interval = 2;              /* XXX: make this configurable */
2124         est->ewma_log = 2;              /* XXX: make this configurable */
2125         timer_setup(&est->timer, idt77252_est_timer, 0);
2126         mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval));
2127
2128         return est;
2129 }
2130
2131 static int
2132 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2133                   struct atm_vcc *vcc, struct atm_qos *qos)
2134 {
2135         int tst_free, tst_used, tst_entries;
2136         unsigned long tmpl, modl;
2137         int tcr, tcra;
2138
2139         if ((qos->txtp.max_pcr == 0) &&
2140             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2141                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2142                        card->name);
2143                 return -EINVAL;
2144         }
2145
2146         tst_used = 0;
2147         tst_free = card->tst_free;
2148         if (test_bit(VCF_TX, &vc->flags))
2149                 tst_used = vc->ntste;
2150         tst_free += tst_used;
2151
2152         tcr = atm_pcr_goal(&qos->txtp);
2153         tcra = tcr >= 0 ? tcr : -tcr;
2154
2155         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2156
2157         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2158         modl = tmpl % (unsigned long)card->utopia_pcr;
2159
2160         tst_entries = (int) (tmpl / card->utopia_pcr);
2161         if (tcr > 0) {
2162                 if (modl > 0)
2163                         tst_entries++;
2164         } else if (tcr == 0) {
2165                 tst_entries = tst_free - SAR_TST_RESERVED;
2166                 if (tst_entries <= 0) {
2167                         printk("%s: no CBR bandwidth free.\n", card->name);
2168                         return -ENOSR;
2169                 }
2170         }
2171
2172         if (tst_entries == 0) {
2173                 printk("%s: selected CBR bandwidth < granularity.\n",
2174                        card->name);
2175                 return -EINVAL;
2176         }
2177
2178         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2179                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2180                 return -ENOSR;
2181         }
2182
2183         vc->ntste = tst_entries;
2184
2185         card->tst_free = tst_free - tst_entries;
2186         if (test_bit(VCF_TX, &vc->flags)) {
2187                 if (tst_used == tst_entries)
2188                         return 0;
2189
2190                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2191                         card->name, tst_used, tst_entries);
2192                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2193                 return 0;
2194         }
2195
2196         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2197         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2198         return 0;
2199 }
2200
2201 static int
2202 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2203                   struct atm_vcc *vcc, struct atm_qos *qos)
2204 {
2205         struct rate_estimator *est = NULL;
2206         unsigned long flags;
2207         int tcr;
2208
2209         spin_lock_irqsave(&vc->lock, flags);
2210         if (vc->estimator) {
2211                 est = vc->estimator;
2212                 vc->estimator = NULL;
2213         }
2214         spin_unlock_irqrestore(&vc->lock, flags);
2215         if (est) {
2216                 del_timer_sync(&est->timer);
2217                 kfree(est);
2218         }
2219
2220         tcr = atm_pcr_goal(&qos->txtp);
2221         if (tcr == 0)
2222                 tcr = card->link_pcr;
2223
2224         vc->estimator = idt77252_init_est(vc, tcr);
2225
2226         vc->class = SCHED_UBR;
2227         vc->init_er = idt77252_rate_logindex(card, tcr);
2228         vc->lacr = vc->init_er;
2229         if (tcr < 0)
2230                 vc->max_er = vc->init_er;
2231         else
2232                 vc->max_er = 0xff;
2233
2234         return 0;
2235 }
2236
2237 static int
2238 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2239                  struct atm_vcc *vcc, struct atm_qos *qos)
2240 {
2241         int error;
2242
2243         if (test_bit(VCF_TX, &vc->flags))
2244                 return -EBUSY;
2245
2246         switch (qos->txtp.traffic_class) {
2247                 case ATM_CBR:
2248                         vc->class = SCHED_CBR;
2249                         break;
2250
2251                 case ATM_UBR:
2252                         vc->class = SCHED_UBR;
2253                         break;
2254
2255                 case ATM_VBR:
2256                 case ATM_ABR:
2257                 default:
2258                         return -EPROTONOSUPPORT;
2259         }
2260
2261         vc->scq = alloc_scq(card, vc->class);
2262         if (!vc->scq) {
2263                 printk("%s: can't get SCQ.\n", card->name);
2264                 return -ENOMEM;
2265         }
2266
2267         vc->scq->scd = get_free_scd(card, vc);
2268         if (vc->scq->scd == 0) {
2269                 printk("%s: no SCD available.\n", card->name);
2270                 free_scq(card, vc->scq);
2271                 return -ENOMEM;
2272         }
2273
2274         fill_scd(card, vc->scq, vc->class);
2275
2276         if (set_tct(card, vc)) {
2277                 printk("%s: class %d not supported.\n",
2278                        card->name, qos->txtp.traffic_class);
2279
2280                 card->scd2vc[vc->scd_index] = NULL;
2281                 free_scq(card, vc->scq);
2282                 return -EPROTONOSUPPORT;
2283         }
2284
2285         switch (vc->class) {
2286                 case SCHED_CBR:
2287                         error = idt77252_init_cbr(card, vc, vcc, qos);
2288                         if (error) {
2289                                 card->scd2vc[vc->scd_index] = NULL;
2290                                 free_scq(card, vc->scq);
2291                                 return error;
2292                         }
2293
2294                         clear_bit(VCF_IDLE, &vc->flags);
2295                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2296                         break;
2297
2298                 case SCHED_UBR:
2299                         error = idt77252_init_ubr(card, vc, vcc, qos);
2300                         if (error) {
2301                                 card->scd2vc[vc->scd_index] = NULL;
2302                                 free_scq(card, vc->scq);
2303                                 return error;
2304                         }
2305
2306                         set_bit(VCF_IDLE, &vc->flags);
2307                         break;
2308         }
2309
2310         vc->tx_vcc = vcc;
2311         set_bit(VCF_TX, &vc->flags);
2312         return 0;
2313 }
2314
2315 static int
2316 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2317                  struct atm_vcc *vcc, struct atm_qos *qos)
2318 {
2319         unsigned long flags;
2320         unsigned long addr;
2321         u32 rcte = 0;
2322
2323         if (test_bit(VCF_RX, &vc->flags))
2324                 return -EBUSY;
2325
2326         vc->rx_vcc = vcc;
2327         set_bit(VCF_RX, &vc->flags);
2328
2329         if ((vcc->vci == 3) || (vcc->vci == 4))
2330                 return 0;
2331
2332         flush_rx_pool(card, &vc->rcv.rx_pool);
2333
2334         rcte |= SAR_RCTE_CONNECTOPEN;
2335         rcte |= SAR_RCTE_RAWCELLINTEN;
2336
2337         switch (qos->aal) {
2338                 case ATM_AAL0:
2339                         rcte |= SAR_RCTE_RCQ;
2340                         break;
2341                 case ATM_AAL1:
2342                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2343                         break;
2344                 case ATM_AAL34:
2345                         rcte |= SAR_RCTE_AAL34;
2346                         break;
2347                 case ATM_AAL5:
2348                         rcte |= SAR_RCTE_AAL5;
2349                         break;
2350                 default:
2351                         rcte |= SAR_RCTE_RCQ;
2352                         break;
2353         }
2354
2355         if (qos->aal != ATM_AAL5)
2356                 rcte |= SAR_RCTE_FBP_1;
2357         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2358                 rcte |= SAR_RCTE_FBP_3;
2359         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2360                 rcte |= SAR_RCTE_FBP_2;
2361         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2362                 rcte |= SAR_RCTE_FBP_1;
2363         else
2364                 rcte |= SAR_RCTE_FBP_01;
2365
2366         addr = card->rct_base + (vc->index << 2);
2367
2368         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2369         write_sram(card, addr, rcte);
2370
2371         spin_lock_irqsave(&card->cmd_lock, flags);
2372         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2373         waitfor_idle(card);
2374         spin_unlock_irqrestore(&card->cmd_lock, flags);
2375
2376         return 0;
2377 }
2378
2379 static int
2380 idt77252_open(struct atm_vcc *vcc)
2381 {
2382         struct atm_dev *dev = vcc->dev;
2383         struct idt77252_dev *card = dev->dev_data;
2384         struct vc_map *vc;
2385         unsigned int index;
2386         unsigned int inuse;
2387         int error;
2388         int vci = vcc->vci;
2389         short vpi = vcc->vpi;
2390
2391         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2392                 return 0;
2393
2394         if (vpi >= (1 << card->vpibits)) {
2395                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2396                 return -EINVAL;
2397         }
2398
2399         if (vci >= (1 << card->vcibits)) {
2400                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2401                 return -EINVAL;
2402         }
2403
2404         set_bit(ATM_VF_ADDR, &vcc->flags);
2405
2406         mutex_lock(&card->mutex);
2407
2408         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2409
2410         switch (vcc->qos.aal) {
2411         case ATM_AAL0:
2412         case ATM_AAL1:
2413         case ATM_AAL5:
2414                 break;
2415         default:
2416                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2417                 mutex_unlock(&card->mutex);
2418                 return -EPROTONOSUPPORT;
2419         }
2420
2421         index = VPCI2VC(card, vpi, vci);
2422         if (!card->vcs[index]) {
2423                 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2424                 if (!card->vcs[index]) {
2425                         printk("%s: can't alloc vc in open()\n", card->name);
2426                         mutex_unlock(&card->mutex);
2427                         return -ENOMEM;
2428                 }
2429                 card->vcs[index]->card = card;
2430                 card->vcs[index]->index = index;
2431
2432                 spin_lock_init(&card->vcs[index]->lock);
2433         }
2434         vc = card->vcs[index];
2435
2436         vcc->dev_data = vc;
2437
2438         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2439                 card->name, vc->index, vcc->vpi, vcc->vci,
2440                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2441                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2442                 vcc->qos.rxtp.max_sdu);
2443
2444         inuse = 0;
2445         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2446             test_bit(VCF_TX, &vc->flags))
2447                 inuse = 1;
2448         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2449             test_bit(VCF_RX, &vc->flags))
2450                 inuse += 2;
2451
2452         if (inuse) {
2453                 printk("%s: %s vci already in use.\n", card->name,
2454                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2455                 mutex_unlock(&card->mutex);
2456                 return -EADDRINUSE;
2457         }
2458
2459         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2460                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2461                 if (error) {
2462                         mutex_unlock(&card->mutex);
2463                         return error;
2464                 }
2465         }
2466
2467         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2468                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2469                 if (error) {
2470                         mutex_unlock(&card->mutex);
2471                         return error;
2472                 }
2473         }
2474
2475         set_bit(ATM_VF_READY, &vcc->flags);
2476
2477         mutex_unlock(&card->mutex);
2478         return 0;
2479 }
2480
2481 static void
2482 idt77252_close(struct atm_vcc *vcc)
2483 {
2484         struct atm_dev *dev = vcc->dev;
2485         struct idt77252_dev *card = dev->dev_data;
2486         struct vc_map *vc = vcc->dev_data;
2487         unsigned long flags;
2488         unsigned long addr;
2489         unsigned long timeout;
2490
2491         mutex_lock(&card->mutex);
2492
2493         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2494                 card->name, vc->index, vcc->vpi, vcc->vci);
2495
2496         clear_bit(ATM_VF_READY, &vcc->flags);
2497
2498         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2499
2500                 spin_lock_irqsave(&vc->lock, flags);
2501                 clear_bit(VCF_RX, &vc->flags);
2502                 vc->rx_vcc = NULL;
2503                 spin_unlock_irqrestore(&vc->lock, flags);
2504
2505                 if ((vcc->vci == 3) || (vcc->vci == 4))
2506                         goto done;
2507
2508                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2509
2510                 spin_lock_irqsave(&card->cmd_lock, flags);
2511                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2512                 waitfor_idle(card);
2513                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2514
2515                 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2516                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2517                                 card->name);
2518
2519                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2520                 }
2521         }
2522
2523 done:
2524         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2525
2526                 spin_lock_irqsave(&vc->lock, flags);
2527                 clear_bit(VCF_TX, &vc->flags);
2528                 clear_bit(VCF_IDLE, &vc->flags);
2529                 clear_bit(VCF_RSV, &vc->flags);
2530                 vc->tx_vcc = NULL;
2531
2532                 if (vc->estimator) {
2533                         del_timer(&vc->estimator->timer);
2534                         kfree(vc->estimator);
2535                         vc->estimator = NULL;
2536                 }
2537                 spin_unlock_irqrestore(&vc->lock, flags);
2538
2539                 timeout = 5 * 1000;
2540                 while (atomic_read(&vc->scq->used) > 0) {
2541                         timeout = msleep_interruptible(timeout);
2542                         if (!timeout) {
2543                                 pr_warn("%s: SCQ drain timeout: %u used\n",
2544                                         card->name, atomic_read(&vc->scq->used));
2545                                 break;
2546                         }
2547                 }
2548
2549                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2550                 clear_scd(card, vc->scq, vc->class);
2551
2552                 if (vc->class == SCHED_CBR) {
2553                         clear_tst(card, vc);
2554                         card->tst_free += vc->ntste;
2555                         vc->ntste = 0;
2556                 }
2557
2558                 card->scd2vc[vc->scd_index] = NULL;
2559                 free_scq(card, vc->scq);
2560         }
2561
2562         mutex_unlock(&card->mutex);
2563 }
2564
2565 static int
2566 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2567 {
2568         struct atm_dev *dev = vcc->dev;
2569         struct idt77252_dev *card = dev->dev_data;
2570         struct vc_map *vc = vcc->dev_data;
2571         int error = 0;
2572
2573         mutex_lock(&card->mutex);
2574
2575         if (qos->txtp.traffic_class != ATM_NONE) {
2576                 if (!test_bit(VCF_TX, &vc->flags)) {
2577                         error = idt77252_init_tx(card, vc, vcc, qos);
2578                         if (error)
2579                                 goto out;
2580                 } else {
2581                         switch (qos->txtp.traffic_class) {
2582                         case ATM_CBR:
2583                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2584                                 if (error)
2585                                         goto out;
2586                                 break;
2587
2588                         case ATM_UBR:
2589                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2590                                 if (error)
2591                                         goto out;
2592
2593                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2594                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2595                                                vc->index, SAR_REG_TCMDQ);
2596                                 }
2597                                 break;
2598
2599                         case ATM_VBR:
2600                         case ATM_ABR:
2601                                 error = -EOPNOTSUPP;
2602                                 goto out;
2603                         }
2604                 }
2605         }
2606
2607         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2608             !test_bit(VCF_RX, &vc->flags)) {
2609                 error = idt77252_init_rx(card, vc, vcc, qos);
2610                 if (error)
2611                         goto out;
2612         }
2613
2614         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2615
2616         set_bit(ATM_VF_HASQOS, &vcc->flags);
2617
2618 out:
2619         mutex_unlock(&card->mutex);
2620         return error;
2621 }
2622
2623 static int
2624 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2625 {
2626         struct idt77252_dev *card = dev->dev_data;
2627         int i, left;
2628
2629         left = (int) *pos;
2630         if (!left--)
2631                 return sprintf(page, "IDT77252 Interrupts:\n");
2632         if (!left--)
2633                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2634         if (!left--)
2635                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2636         if (!left--)
2637                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2638         if (!left--)
2639                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2640         if (!left--)
2641                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2642         if (!left--)
2643                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2644         if (!left--)
2645                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2646         if (!left--)
2647                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2648         if (!left--)
2649                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2650         if (!left--)
2651                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2652         if (!left--)
2653                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2654         if (!left--)
2655                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2656         if (!left--)
2657                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2658         if (!left--)
2659                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2660
2661         for (i = 0; i < card->tct_size; i++) {
2662                 unsigned long tct;
2663                 struct atm_vcc *vcc;
2664                 struct vc_map *vc;
2665                 char *p;
2666
2667                 vc = card->vcs[i];
2668                 if (!vc)
2669                         continue;
2670
2671                 vcc = NULL;
2672                 if (vc->tx_vcc)
2673                         vcc = vc->tx_vcc;
2674                 if (!vcc)
2675                         continue;
2676                 if (left--)
2677                         continue;
2678
2679                 p = page;
2680                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2681                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2682
2683                 for (i = 0; i < 8; i++)
2684                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2685                 p += sprintf(p, "\n");
2686                 return p - page;
2687         }
2688         return 0;
2689 }
2690
2691 /*****************************************************************************/
2692 /*                                                                           */
2693 /* Interrupt handler                                                         */
2694 /*                                                                           */
2695 /*****************************************************************************/
2696
2697 static void
2698 idt77252_collect_stat(struct idt77252_dev *card)
2699 {
2700         (void) readl(SAR_REG_CDC);
2701         (void) readl(SAR_REG_VPEC);
2702         (void) readl(SAR_REG_ICC);
2703
2704 }
2705
2706 static irqreturn_t
2707 idt77252_interrupt(int irq, void *dev_id)
2708 {
2709         struct idt77252_dev *card = dev_id;
2710         u32 stat;
2711
2712         stat = readl(SAR_REG_STAT) & 0xffff;
2713         if (!stat)      /* no interrupt for us */
2714                 return IRQ_NONE;
2715
2716         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2717                 printk("%s: Re-entering irq_handler()\n", card->name);
2718                 goto out;
2719         }
2720
2721         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2722
2723         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2724                 INTPRINTK("%s: TSIF\n", card->name);
2725                 card->irqstat[15]++;
2726                 idt77252_tx(card);
2727         }
2728         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2729                 INTPRINTK("%s: TXICP\n", card->name);
2730                 card->irqstat[14]++;
2731 #ifdef CONFIG_ATM_IDT77252_DEBUG
2732                 idt77252_tx_dump(card);
2733 #endif
2734         }
2735         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2736                 INTPRINTK("%s: TSQF\n", card->name);
2737                 card->irqstat[12]++;
2738                 idt77252_tx(card);
2739         }
2740         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2741                 INTPRINTK("%s: TMROF\n", card->name);
2742                 card->irqstat[11]++;
2743                 idt77252_collect_stat(card);
2744         }
2745
2746         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2747                 INTPRINTK("%s: EPDU\n", card->name);
2748                 card->irqstat[5]++;
2749                 idt77252_rx(card);
2750         }
2751         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2752                 INTPRINTK("%s: RSQAF\n", card->name);
2753                 card->irqstat[1]++;
2754                 idt77252_rx(card);
2755         }
2756         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2757                 INTPRINTK("%s: RSQF\n", card->name);
2758                 card->irqstat[6]++;
2759                 idt77252_rx(card);
2760         }
2761         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2762                 INTPRINTK("%s: RAWCF\n", card->name);
2763                 card->irqstat[4]++;
2764                 idt77252_rx_raw(card);
2765         }
2766
2767         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2768                 INTPRINTK("%s: PHYI", card->name);
2769                 card->irqstat[10]++;
2770                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2771                         card->atmdev->phy->interrupt(card->atmdev);
2772         }
2773
2774         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2775                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2776
2777                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2778
2779                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2780
2781                 if (stat & SAR_STAT_FBQ0A)
2782                         card->irqstat[2]++;
2783                 if (stat & SAR_STAT_FBQ1A)
2784                         card->irqstat[3]++;
2785                 if (stat & SAR_STAT_FBQ2A)
2786                         card->irqstat[7]++;
2787                 if (stat & SAR_STAT_FBQ3A)
2788                         card->irqstat[8]++;
2789
2790                 schedule_work(&card->tqueue);
2791         }
2792
2793 out:
2794         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2795         return IRQ_HANDLED;
2796 }
2797
2798 static void
2799 idt77252_softint(struct work_struct *work)
2800 {
2801         struct idt77252_dev *card =
2802                 container_of(work, struct idt77252_dev, tqueue);
2803         u32 stat;
2804         int done;
2805
2806         for (done = 1; ; done = 1) {
2807                 stat = readl(SAR_REG_STAT) >> 16;
2808
2809                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2810                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2811                         done = 0;
2812                 }
2813
2814                 stat >>= 4;
2815                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2816                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2817                         done = 0;
2818                 }
2819
2820                 stat >>= 4;
2821                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2822                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2823                         done = 0;
2824                 }
2825
2826                 stat >>= 4;
2827                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2828                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2829                         done = 0;
2830                 }
2831
2832                 if (done)
2833                         break;
2834         }
2835
2836         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2837 }
2838
2839
2840 static int
2841 open_card_oam(struct idt77252_dev *card)
2842 {
2843         unsigned long flags;
2844         unsigned long addr;
2845         struct vc_map *vc;
2846         int vpi, vci;
2847         int index;
2848         u32 rcte;
2849
2850         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2851                 for (vci = 3; vci < 5; vci++) {
2852                         index = VPCI2VC(card, vpi, vci);
2853
2854                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2855                         if (!vc) {
2856                                 printk("%s: can't alloc vc\n", card->name);
2857                                 return -ENOMEM;
2858                         }
2859                         vc->index = index;
2860                         card->vcs[index] = vc;
2861
2862                         flush_rx_pool(card, &vc->rcv.rx_pool);
2863
2864                         rcte = SAR_RCTE_CONNECTOPEN |
2865                                SAR_RCTE_RAWCELLINTEN |
2866                                SAR_RCTE_RCQ |
2867                                SAR_RCTE_FBP_1;
2868
2869                         addr = card->rct_base + (vc->index << 2);
2870                         write_sram(card, addr, rcte);
2871
2872                         spin_lock_irqsave(&card->cmd_lock, flags);
2873                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2874                                SAR_REG_CMD);
2875                         waitfor_idle(card);
2876                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2877                 }
2878         }
2879
2880         return 0;
2881 }
2882
2883 static void
2884 close_card_oam(struct idt77252_dev *card)
2885 {
2886         unsigned long flags;
2887         unsigned long addr;
2888         struct vc_map *vc;
2889         int vpi, vci;
2890         int index;
2891
2892         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2893                 for (vci = 3; vci < 5; vci++) {
2894                         index = VPCI2VC(card, vpi, vci);
2895                         vc = card->vcs[index];
2896
2897                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2898
2899                         spin_lock_irqsave(&card->cmd_lock, flags);
2900                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2901                                SAR_REG_CMD);
2902                         waitfor_idle(card);
2903                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2904
2905                         if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2906                                 DPRINTK("%s: closing a VC "
2907                                         "with pending rx buffers.\n",
2908                                         card->name);
2909
2910                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2911                         }
2912                 }
2913         }
2914 }
2915
2916 static int
2917 open_card_ubr0(struct idt77252_dev *card)
2918 {
2919         struct vc_map *vc;
2920
2921         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2922         if (!vc) {
2923                 printk("%s: can't alloc vc\n", card->name);
2924                 return -ENOMEM;
2925         }
2926         card->vcs[0] = vc;
2927         vc->class = SCHED_UBR0;
2928
2929         vc->scq = alloc_scq(card, vc->class);
2930         if (!vc->scq) {
2931                 printk("%s: can't get SCQ.\n", card->name);
2932                 return -ENOMEM;
2933         }
2934
2935         card->scd2vc[0] = vc;
2936         vc->scd_index = 0;
2937         vc->scq->scd = card->scd_base;
2938
2939         fill_scd(card, vc->scq, vc->class);
2940
2941         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2942         write_sram(card, card->tct_base + 1, 0);
2943         write_sram(card, card->tct_base + 2, 0);
2944         write_sram(card, card->tct_base + 3, 0);
2945         write_sram(card, card->tct_base + 4, 0);
2946         write_sram(card, card->tct_base + 5, 0);
2947         write_sram(card, card->tct_base + 6, 0);
2948         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2949
2950         clear_bit(VCF_IDLE, &vc->flags);
2951         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2952         return 0;
2953 }
2954
2955 static int
2956 idt77252_dev_open(struct idt77252_dev *card)
2957 {
2958         u32 conf;
2959
2960         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2961                 printk("%s: SAR not yet initialized.\n", card->name);
2962                 return -1;
2963         }
2964
2965         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
2966             SAR_RX_DELAY |      /* interrupt on complete PDU            */
2967             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
2968             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
2969             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
2970             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
2971             SAR_CFG_TXEN |      /* transmit operation enable            */
2972             SAR_CFG_TXINT |     /* interrupt on transmit status         */
2973             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
2974             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
2975             SAR_CFG_PHYIE       /* enable PHY interrupts                */
2976             ;
2977
2978 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2979         /* Test RAW cell receive. */
2980         conf |= SAR_CFG_VPECA;
2981 #endif
2982
2983         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2984
2985         if (open_card_oam(card)) {
2986                 printk("%s: Error initializing OAM.\n", card->name);
2987                 return -1;
2988         }
2989
2990         if (open_card_ubr0(card)) {
2991                 printk("%s: Error initializing UBR0.\n", card->name);
2992                 return -1;
2993         }
2994
2995         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
2996         return 0;
2997 }
2998
2999 static void idt77252_dev_close(struct atm_dev *dev)
3000 {
3001         struct idt77252_dev *card = dev->dev_data;
3002         u32 conf;
3003
3004         close_card_oam(card);
3005
3006         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3007             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3008             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3009             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3010             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3011             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3012             SAR_CFG_TXEN |      /* transmit operation enable     */
3013             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3014             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3015             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3016             ;
3017
3018         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3019
3020         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3021 }
3022
3023
3024 /*****************************************************************************/
3025 /*                                                                           */
3026 /* Initialisation and Deinitialization of IDT77252                           */
3027 /*                                                                           */
3028 /*****************************************************************************/
3029
3030
3031 static void
3032 deinit_card(struct idt77252_dev *card)
3033 {
3034         struct sk_buff *skb;
3035         int i, j;
3036
3037         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3038                 printk("%s: SAR not yet initialized.\n", card->name);
3039                 return;
3040         }
3041         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3042
3043         writel(0, SAR_REG_CFG);
3044
3045         if (card->atmdev)
3046                 atm_dev_deregister(card->atmdev);
3047
3048         for (i = 0; i < 4; i++) {
3049                 for (j = 0; j < FBQ_SIZE; j++) {
3050                         skb = card->sbpool[i].skb[j];
3051                         if (skb) {
3052                                 dma_unmap_single(&card->pcidev->dev,
3053                                                  IDT77252_PRV_PADDR(skb),
3054                                                  (skb_end_pointer(skb) -
3055                                                   skb->data),
3056                                                  DMA_FROM_DEVICE);
3057                                 card->sbpool[i].skb[j] = NULL;
3058                                 dev_kfree_skb(skb);
3059                         }
3060                 }
3061         }
3062
3063         vfree(card->soft_tst);
3064
3065         vfree(card->scd2vc);
3066
3067         vfree(card->vcs);
3068
3069         if (card->raw_cell_hnd) {
3070                 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32),
3071                                   card->raw_cell_hnd, card->raw_cell_paddr);
3072         }
3073
3074         if (card->rsq.base) {
3075                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3076                 deinit_rsq(card);
3077         }
3078
3079         if (card->tsq.base) {
3080                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3081                 deinit_tsq(card);
3082         }
3083
3084         DIPRINTK("idt77252: Release IRQ.\n");
3085         free_irq(card->pcidev->irq, card);
3086
3087         for (i = 0; i < 4; i++) {
3088                 if (card->fbq[i])
3089                         iounmap(card->fbq[i]);
3090         }
3091
3092         if (card->membase)
3093                 iounmap(card->membase);
3094
3095         clear_bit(IDT77252_BIT_INIT, &card->flags);
3096         DIPRINTK("%s: Card deinitialized.\n", card->name);
3097 }
3098
3099
3100 static void init_sram(struct idt77252_dev *card)
3101 {
3102         int i;
3103
3104         for (i = 0; i < card->sramsize; i += 4)
3105                 write_sram(card, (i >> 2), 0);
3106
3107         /* set SRAM layout for THIS card */
3108         if (card->sramsize == (512 * 1024)) {
3109                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3110                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3111                     / SAR_SRAM_TCT_SIZE;
3112                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3113                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3114                     / SAR_SRAM_RCT_SIZE;
3115                 card->rt_base = SAR_SRAM_RT_128_BASE;
3116                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3117                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3118                     / SAR_SRAM_SCD_SIZE;
3119                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3120                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3121                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3122                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3123                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3124                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3125                 card->fifo_size = SAR_RXFD_SIZE_32K;
3126         } else {
3127                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3128                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3129                     / SAR_SRAM_TCT_SIZE;
3130                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3131                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3132                     / SAR_SRAM_RCT_SIZE;
3133                 card->rt_base = SAR_SRAM_RT_32_BASE;
3134                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3135                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3136                     / SAR_SRAM_SCD_SIZE;
3137                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3138                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3139                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3140                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3141                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3142                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3143                 card->fifo_size = SAR_RXFD_SIZE_4K;
3144         }
3145
3146         /* Initialize TCT */
3147         for (i = 0; i < card->tct_size; i++) {
3148                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3149                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3150                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3151                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3152                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3153                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3154                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3155                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3156         }
3157
3158         /* Initialize RCT */
3159         for (i = 0; i < card->rct_size; i++) {
3160                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3161                                     (u32) SAR_RCTE_RAWCELLINTEN);
3162                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3163                                     (u32) 0);
3164                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3165                                     (u32) 0);
3166                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3167                                     (u32) 0xffffffff);
3168         }
3169
3170         writel((SAR_FBQ0_LOW << 28) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3171         writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3172         writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3173         writel((SAR_FBQ3_LOW << 28) | (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3174
3175         /* Initialize rate table  */
3176         for (i = 0; i < 256; i++) {
3177                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3178         }
3179
3180         for (i = 0; i < 128; i++) {
3181                 unsigned int tmp;
3182
3183                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3184                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3185                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3186                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3187                 write_sram(card, card->rt_base + 256 + i, tmp);
3188         }
3189
3190 #if 0 /* Fill RDF and AIR tables. */
3191         for (i = 0; i < 128; i++) {
3192                 unsigned int tmp;
3193
3194                 tmp = RDF[0][(i << 1) + 0] << 16;
3195                 tmp |= RDF[0][(i << 1) + 1] << 0;
3196                 write_sram(card, card->rt_base + 512 + i, tmp);
3197         }
3198
3199         for (i = 0; i < 128; i++) {
3200                 unsigned int tmp;
3201
3202                 tmp = AIR[0][(i << 1) + 0] << 16;
3203                 tmp |= AIR[0][(i << 1) + 1] << 0;
3204                 write_sram(card, card->rt_base + 640 + i, tmp);
3205         }
3206 #endif
3207
3208         IPRINTK("%s: initialize rate table ...\n", card->name);
3209         writel(card->rt_base << 2, SAR_REG_RTBL);
3210
3211         /* Initialize TSTs */
3212         IPRINTK("%s: initialize TST ...\n", card->name);
3213         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3214
3215         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3216                 write_sram(card, i, TSTE_OPC_VAR);
3217         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3218         idt77252_sram_write_errors = 1;
3219         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3220         idt77252_sram_write_errors = 0;
3221         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3222                 write_sram(card, i, TSTE_OPC_VAR);
3223         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3224         idt77252_sram_write_errors = 1;
3225         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3226         idt77252_sram_write_errors = 0;
3227
3228         card->tst_index = 0;
3229         writel(card->tst[0] << 2, SAR_REG_TSTB);
3230
3231         /* Initialize ABRSTD and Receive FIFO */
3232         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3233         writel(card->abrst_size | (card->abrst_base << 2),
3234                SAR_REG_ABRSTD);
3235
3236         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3237         writel(card->fifo_size | (card->fifo_base << 2),
3238                SAR_REG_RXFD);
3239
3240         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3241 }
3242
3243 static int init_card(struct atm_dev *dev)
3244 {
3245         struct idt77252_dev *card = dev->dev_data;
3246         struct pci_dev *pcidev = card->pcidev;
3247         unsigned long tmpl, modl;
3248         unsigned int linkrate, rsvdcr;
3249         unsigned int tst_entries;
3250         struct net_device *tmp;
3251         char tname[10];
3252
3253         u32 size;
3254         u_char pci_byte;
3255         u32 conf;
3256         int i, k;
3257
3258         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3259                 printk("Error: SAR already initialized.\n");
3260                 return -1;
3261         }
3262
3263 /*****************************************************************/
3264 /*   P C I   C O N F I G U R A T I O N                           */
3265 /*****************************************************************/
3266
3267         /* Set PCI Retry-Timeout and TRDY timeout */
3268         IPRINTK("%s: Checking PCI retries.\n", card->name);
3269         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3270                 printk("%s: can't read PCI retry timeout.\n", card->name);
3271                 deinit_card(card);
3272                 return -1;
3273         }
3274         if (pci_byte != 0) {
3275                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3276                         card->name, pci_byte);
3277                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3278                         printk("%s: can't set PCI retry timeout.\n",
3279                                card->name);
3280                         deinit_card(card);
3281                         return -1;
3282                 }
3283         }
3284         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3285         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3286                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3287                 deinit_card(card);
3288                 return -1;
3289         }
3290         if (pci_byte != 0) {
3291                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3292                         card->name, pci_byte);
3293                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3294                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3295                         deinit_card(card);
3296                         return -1;
3297                 }
3298         }
3299         /* Reset Timer register */
3300         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3301                 printk("%s: resetting timer overflow.\n", card->name);
3302                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3303         }
3304         IPRINTK("%s: Request IRQ ... ", card->name);
3305         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3306                         card->name, card) != 0) {
3307                 printk("%s: can't allocate IRQ.\n", card->name);
3308                 deinit_card(card);
3309                 return -1;
3310         }
3311         IPRINTK("got %d.\n", pcidev->irq);
3312
3313 /*****************************************************************/
3314 /*   C H E C K   A N D   I N I T   S R A M                       */
3315 /*****************************************************************/
3316
3317         IPRINTK("%s: Initializing SRAM\n", card->name);
3318
3319         /* preset size of connecton table, so that init_sram() knows about it */
3320         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3321                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3322                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3323 #ifndef ATM_IDT77252_SEND_IDLE
3324                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3325 #endif
3326                 0;
3327
3328         if (card->sramsize == (512 * 1024))
3329                 conf |= SAR_CFG_CNTBL_1k;
3330         else
3331                 conf |= SAR_CFG_CNTBL_512;
3332
3333         switch (vpibits) {
3334         case 0:
3335                 conf |= SAR_CFG_VPVCS_0;
3336                 break;
3337         default:
3338         case 1:
3339                 conf |= SAR_CFG_VPVCS_1;
3340                 break;
3341         case 2:
3342                 conf |= SAR_CFG_VPVCS_2;
3343                 break;
3344         case 8:
3345                 conf |= SAR_CFG_VPVCS_8;
3346                 break;
3347         }
3348
3349         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3350
3351         init_sram(card);
3352
3353 /********************************************************************/
3354 /*  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 */
3355 /********************************************************************/
3356         /* Initialize TSQ */
3357         if (0 != init_tsq(card)) {
3358                 deinit_card(card);
3359                 return -1;
3360         }
3361         /* Initialize RSQ */
3362         if (0 != init_rsq(card)) {
3363                 deinit_card(card);
3364                 return -1;
3365         }
3366
3367         card->vpibits = vpibits;
3368         if (card->sramsize == (512 * 1024)) {
3369                 card->vcibits = 10 - card->vpibits;
3370         } else {
3371                 card->vcibits = 9 - card->vpibits;
3372         }
3373
3374         card->vcimask = 0;
3375         for (k = 0, i = 1; k < card->vcibits; k++) {
3376                 card->vcimask |= i;
3377                 i <<= 1;
3378         }
3379
3380         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3381         writel(0, SAR_REG_VPM);
3382
3383         /* Little Endian Order   */
3384         writel(0, SAR_REG_GP);
3385
3386         /* Initialize RAW Cell Handle Register  */
3387         card->raw_cell_hnd = dma_alloc_coherent(&card->pcidev->dev,
3388                                                 2 * sizeof(u32),
3389                                                 &card->raw_cell_paddr,
3390                                                 GFP_KERNEL);
3391         if (!card->raw_cell_hnd) {
3392                 printk("%s: memory allocation failure.\n", card->name);
3393                 deinit_card(card);
3394                 return -1;
3395         }
3396         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3397         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3398                 card->raw_cell_hnd);
3399
3400         size = sizeof(struct vc_map *) * card->tct_size;
3401         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3402         card->vcs = vzalloc(size);
3403         if (!card->vcs) {
3404                 printk("%s: memory allocation failure.\n", card->name);
3405                 deinit_card(card);
3406                 return -1;
3407         }
3408
3409         size = sizeof(struct vc_map *) * card->scd_size;
3410         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3411                 card->name, size);
3412         card->scd2vc = vzalloc(size);
3413         if (!card->scd2vc) {
3414                 printk("%s: memory allocation failure.\n", card->name);
3415                 deinit_card(card);
3416                 return -1;
3417         }
3418
3419         size = sizeof(struct tst_info) * (card->tst_size - 2);
3420         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3421                 card->name, size);
3422         card->soft_tst = vmalloc(size);
3423         if (!card->soft_tst) {
3424                 printk("%s: memory allocation failure.\n", card->name);
3425                 deinit_card(card);
3426                 return -1;
3427         }
3428         for (i = 0; i < card->tst_size - 2; i++) {
3429                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3430                 card->soft_tst[i].vc = NULL;
3431         }
3432
3433         if (dev->phy == NULL) {
3434                 printk("%s: No LT device defined.\n", card->name);
3435                 deinit_card(card);
3436                 return -1;
3437         }
3438         if (dev->phy->ioctl == NULL) {
3439                 printk("%s: LT had no IOCTL function defined.\n", card->name);
3440                 deinit_card(card);
3441                 return -1;
3442         }
3443
3444 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3445         /*
3446          * this is a jhs hack to get around special functionality in the
3447          * phy driver for the atecom hardware; the functionality doesn't
3448          * exist in the linux atm suni driver
3449          *
3450          * it isn't the right way to do things, but as the guy from NIST
3451          * said, talking about their measurement of the fine structure
3452          * constant, "it's good enough for government work."
3453          */
3454         linkrate = 149760000;
3455 #endif
3456
3457         card->link_pcr = (linkrate / 8 / 53);
3458         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3459                card->name, linkrate, card->link_pcr);
3460
3461 #ifdef ATM_IDT77252_SEND_IDLE
3462         card->utopia_pcr = card->link_pcr;
3463 #else
3464         card->utopia_pcr = (160000000 / 8 / 54);
3465 #endif
3466
3467         rsvdcr = 0;
3468         if (card->utopia_pcr > card->link_pcr)
3469                 rsvdcr = card->utopia_pcr - card->link_pcr;
3470
3471         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3472         modl = tmpl % (unsigned long)card->utopia_pcr;
3473         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3474         if (modl)
3475                 tst_entries++;
3476         card->tst_free -= tst_entries;
3477         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3478
3479 #ifdef HAVE_EEPROM
3480         idt77252_eeprom_init(card);
3481         printk("%s: EEPROM: %02x:", card->name,
3482                 idt77252_eeprom_read_status(card));
3483
3484         for (i = 0; i < 0x80; i++) {
3485                 printk(" %02x",
3486                 idt77252_eeprom_read_byte(card, i)
3487                 );
3488         }
3489         printk("\n");
3490 #endif /* HAVE_EEPROM */
3491
3492         /*
3493          * XXX: <hack>
3494          */
3495         sprintf(tname, "eth%d", card->index);
3496         tmp = dev_get_by_name(&init_net, tname);        /* jhs: was "tmp = dev_get(tname);" */
3497         if (tmp) {
3498                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3499                 dev_put(tmp);
3500                 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3501         }
3502         /*
3503          * XXX: </hack>
3504          */
3505
3506         /* Set Maximum Deficit Count for now. */
3507         writel(0xffff, SAR_REG_MDFCT);
3508
3509         set_bit(IDT77252_BIT_INIT, &card->flags);
3510
3511         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3512         return 0;
3513 }
3514
3515
3516 /*****************************************************************************/
3517 /*                                                                           */
3518 /* Probing of IDT77252 ABR SAR                                               */
3519 /*                                                                           */
3520 /*****************************************************************************/
3521
3522
3523 static int idt77252_preset(struct idt77252_dev *card)
3524 {
3525         u16 pci_command;
3526
3527 /*****************************************************************/
3528 /*   P C I   C O N F I G U R A T I O N                           */
3529 /*****************************************************************/
3530
3531         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3532                 card->name);
3533         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3534                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3535                 deinit_card(card);
3536                 return -1;
3537         }
3538         if (!(pci_command & PCI_COMMAND_IO)) {
3539                 printk("%s: PCI_COMMAND: %04x (?)\n",
3540                        card->name, pci_command);
3541                 deinit_card(card);
3542                 return (-1);
3543         }
3544         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3545         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3546                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3547                 deinit_card(card);
3548                 return -1;
3549         }
3550 /*****************************************************************/
3551 /*   G E N E R I C   R E S E T                                   */
3552 /*****************************************************************/
3553
3554         /* Software reset */
3555         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3556         mdelay(1);
3557         writel(0, SAR_REG_CFG);
3558
3559         IPRINTK("%s: Software resetted.\n", card->name);
3560         return 0;
3561 }
3562
3563
3564 static unsigned long probe_sram(struct idt77252_dev *card)
3565 {
3566         u32 data, addr;
3567
3568         writel(0, SAR_REG_DR0);
3569         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3570
3571         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3572                 writel(ATM_POISON, SAR_REG_DR0);
3573                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3574
3575                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3576                 data = readl(SAR_REG_DR0);
3577
3578                 if (data != 0)
3579                         break;
3580         }
3581
3582         return addr * sizeof(u32);
3583 }
3584
3585 static int idt77252_init_one(struct pci_dev *pcidev,
3586                              const struct pci_device_id *id)
3587 {
3588         static struct idt77252_dev **last = &idt77252_chain;
3589         static int index = 0;
3590
3591         unsigned long membase, srambase;
3592         struct idt77252_dev *card;
3593         struct atm_dev *dev;
3594         int i, err;
3595
3596
3597         if ((err = pci_enable_device(pcidev))) {
3598                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3599                 return err;
3600         }
3601
3602         if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
3603                 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
3604                 goto err_out_disable_pdev;
3605         }
3606
3607         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3608         if (!card) {
3609                 printk("idt77252-%d: can't allocate private data\n", index);
3610                 err = -ENOMEM;
3611                 goto err_out_disable_pdev;
3612         }
3613         card->revision = pcidev->revision;
3614         card->index = index;
3615         card->pcidev = pcidev;
3616         sprintf(card->name, "idt77252-%d", card->index);
3617
3618         INIT_WORK(&card->tqueue, idt77252_softint);
3619
3620         membase = pci_resource_start(pcidev, 1);
3621         srambase = pci_resource_start(pcidev, 2);
3622
3623         mutex_init(&card->mutex);
3624         spin_lock_init(&card->cmd_lock);
3625         spin_lock_init(&card->tst_lock);
3626
3627         timer_setup(&card->tst_timer, tst_timer, 0);
3628
3629         /* Do the I/O remapping... */
3630         card->membase = ioremap(membase, 1024);
3631         if (!card->membase) {
3632                 printk("%s: can't ioremap() membase\n", card->name);
3633                 err = -EIO;
3634                 goto err_out_free_card;
3635         }
3636
3637         if (idt77252_preset(card)) {
3638                 printk("%s: preset failed\n", card->name);
3639                 err = -EIO;
3640                 goto err_out_iounmap;
3641         }
3642
3643         dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3644                                NULL);
3645         if (!dev) {
3646                 printk("%s: can't register atm device\n", card->name);
3647                 err = -EIO;
3648                 goto err_out_iounmap;
3649         }
3650         dev->dev_data = card;
3651         card->atmdev = dev;
3652
3653 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3654         suni_init(dev);
3655         if (!dev->phy) {
3656                 printk("%s: can't init SUNI\n", card->name);
3657                 err = -EIO;
3658                 goto err_out_deinit_card;
3659         }
3660 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3661
3662         card->sramsize = probe_sram(card);
3663
3664         for (i = 0; i < 4; i++) {
3665                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3666                 if (!card->fbq[i]) {
3667                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3668                         err = -EIO;
3669                         goto err_out_deinit_card;
3670                 }
3671         }
3672
3673         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3674                card->name, ((card->revision > 1) && (card->revision < 25)) ?
3675                'A' + card->revision - 1 : '?', membase, srambase,
3676                card->sramsize / 1024);
3677
3678         if (init_card(dev)) {
3679                 printk("%s: init_card failed\n", card->name);
3680                 err = -EIO;
3681                 goto err_out_deinit_card;
3682         }
3683
3684         dev->ci_range.vpi_bits = card->vpibits;
3685         dev->ci_range.vci_bits = card->vcibits;
3686         dev->link_rate = card->link_pcr;
3687
3688         if (dev->phy->start)
3689                 dev->phy->start(dev);
3690
3691         if (idt77252_dev_open(card)) {
3692                 printk("%s: dev_open failed\n", card->name);
3693                 err = -EIO;
3694                 goto err_out_stop;
3695         }
3696
3697         *last = card;
3698         last = &card->next;
3699         index++;
3700
3701         return 0;
3702
3703 err_out_stop:
3704         if (dev->phy->stop)
3705                 dev->phy->stop(dev);
3706
3707 err_out_deinit_card:
3708         deinit_card(card);
3709
3710 err_out_iounmap:
3711         iounmap(card->membase);
3712
3713 err_out_free_card:
3714         kfree(card);
3715
3716 err_out_disable_pdev:
3717         pci_disable_device(pcidev);
3718         return err;
3719 }
3720
3721 static const struct pci_device_id idt77252_pci_tbl[] =
3722 {
3723         { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3724         { 0, }
3725 };
3726
3727 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3728
3729 static struct pci_driver idt77252_driver = {
3730         .name           = "idt77252",
3731         .id_table       = idt77252_pci_tbl,
3732         .probe          = idt77252_init_one,
3733 };
3734
3735 static int __init idt77252_init(void)
3736 {
3737         struct sk_buff *skb;
3738
3739         printk("%s: at %p\n", __func__, idt77252_init);
3740         BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct idt77252_skb_prv) + sizeof(struct atm_skb_data));
3741         return pci_register_driver(&idt77252_driver);
3742 }
3743
3744 static void __exit idt77252_exit(void)
3745 {
3746         struct idt77252_dev *card;
3747         struct atm_dev *dev;
3748
3749         pci_unregister_driver(&idt77252_driver);
3750
3751         while (idt77252_chain) {
3752                 card = idt77252_chain;
3753                 dev = card->atmdev;
3754                 idt77252_chain = card->next;
3755
3756                 if (dev->phy->stop)
3757                         dev->phy->stop(dev);
3758                 deinit_card(card);
3759                 pci_disable_device(card->pcidev);
3760                 kfree(card);
3761         }
3762
3763         DIPRINTK("idt77252: finished cleanup-module().\n");
3764 }
3765
3766 module_init(idt77252_init);
3767 module_exit(idt77252_exit);
3768
3769 MODULE_LICENSE("GPL");
3770
3771 module_param(vpibits, uint, 0);
3772 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3773 #ifdef CONFIG_ATM_IDT77252_DEBUG
3774 module_param(debug, ulong, 0644);
3775 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3776 #endif
3777
3778 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3779 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");