drivers/atm/idt77252.c

   1 /*******************************************************************
   2  *
   3  * Copyright (c) 2000 ATecoM GmbH
   4  *
   5  * The author may be reached at [email protected].
   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_zalloc_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
 839         if (skb->len == 0) {
 840                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
 841                 return -EINVAL;
 842         }
 843
 844         TXPRINTK("%s: Sending %d bytes of data.\n",
 845                  card->name, skb->len);
 846
 847         tbd = &IDT77252_PRV_TBD(skb);
 848         vcc = ATM_SKB(skb)->vcc;
 849
 850         IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data,
 851                                                  skb->len, DMA_TO_DEVICE);
 852
 853         error = -EINVAL;
 854
 855         if (oam) {
 856                 if (skb->len != 52)
 857                         goto errout;
 858
 859                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
 860                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 861                 tbd->word_3 = 0x00000000;
 862                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 863                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 864
 865                 if (test_bit(VCF_RSV, &vc->flags))
 866                         vc = card->vcs[0];
 867
 868                 goto done;
 869         }
 870
 871         if (test_bit(VCF_RSV, &vc->flags)) {
 872                 printk("%s: Trying to transmit on reserved VC\n", card->name);
 873                 goto errout;
 874         }
 875
 876         aal = vcc->qos.aal;
 877
 878         switch (aal) {
 879         case ATM_AAL0:
 880         case ATM_AAL34:
 881                 if (skb->len > 52)
 882                         goto errout;
 883
 884                 if (aal == ATM_AAL0)
 885                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
 886                                       ATM_CELL_PAYLOAD;
 887                 else
 888                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
 889                                       ATM_CELL_PAYLOAD;
 890
 891                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 892                 tbd->word_3 = 0x00000000;
 893                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 894                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 895                 break;
 896
 897         case ATM_AAL5:
 898                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
 899                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
 900                 tbd->word_3 = skb->len;
 901                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
 902                               (vcc->vci << SAR_TBD_VCI_SHIFT);
 903                 break;
 904
 905         case ATM_AAL1:
 906         case ATM_AAL2:
 907         default:
 908                 printk("%s: Traffic type not supported.\n", card->name);
 909                 error = -EPROTONOSUPPORT;
 910                 goto errout;
 911         }
 912
 913 done:
 914         spin_lock_irqsave(&vc->scq->skblock, flags);
 915         skb_queue_tail(&vc->scq->pending, skb);
 916
 917         while ((skb = skb_dequeue(&vc->scq->pending))) {
 918                 if (push_on_scq(card, vc, skb)) {
 919                         skb_queue_head(&vc->scq->pending, skb);
 920                         break;
 921                 }
 922         }
 923         spin_unlock_irqrestore(&vc->scq->skblock, flags);
 924
 925         return 0;
 926
 927 errout:
 928         dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
 929                          skb->len, DMA_TO_DEVICE);
 930         return error;
 931 }
 932
 933 static unsigned long
 934 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
 935 {
 936         int i;
 937
 938         for (i = 0; i < card->scd_size; i++) {
 939                 if (!card->scd2vc[i]) {
 940                         card->scd2vc[i] = vc;
 941                         vc->scd_index = i;
 942                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
 943                 }
 944         }
 945         return 0;
 946 }
 947
 948 static void
 949 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 950 {
 951         write_sram(card, scq->scd, scq->paddr);
 952         write_sram(card, scq->scd + 1, 0x00000000);
 953         write_sram(card, scq->scd + 2, 0xffffffff);
 954         write_sram(card, scq->scd + 3, 0x00000000);
 955 }
 956
 957 static void
 958 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 959 {
 960         return;
 961 }
 962
 963 /*****************************************************************************/
 964 /*                                                                           */
 965 /* RSQ Handling                                                              */
 966 /*                                                                           */
 967 /*****************************************************************************/
 968
 969 static int
 970 init_rsq(struct idt77252_dev *card)
 971 {
 972         struct rsq_entry *rsqe;
 973
 974         card->rsq.base = dma_zalloc_coherent(&card->pcidev->dev, RSQSIZE,
 975                                              &card->rsq.paddr, GFP_KERNEL);
 976         if (card->rsq.base == NULL) {
 977                 printk("%s: can't allocate RSQ.\n", card->name);
 978                 return -1;
 979         }
 980
 981         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
 982         card->rsq.next = card->rsq.last;
 983         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
 984                 rsqe->word_4 = 0;
 985
 986         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
 987                SAR_REG_RSQH);
 988         writel(card->rsq.paddr, SAR_REG_RSQB);
 989
 990         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
 991                 (unsigned long) card->rsq.base,
 992                 readl(SAR_REG_RSQB));
 993         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
 994                 card->name,
 995                 readl(SAR_REG_RSQH),
 996                 readl(SAR_REG_RSQB),
 997                 readl(SAR_REG_RSQT));
 998
 999         return 0;
1000 }
1001
1002 static void
1003 deinit_rsq(struct idt77252_dev *card)
1004 {
1005         dma_free_coherent(&card->pcidev->dev, RSQSIZE,
1006                           card->rsq.base, card->rsq.paddr);
1007 }
1008
1009 static void
1010 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1011 {
1012         struct atm_vcc *vcc;
1013         struct sk_buff *skb;
1014         struct rx_pool *rpp;
1015         struct vc_map *vc;
1016         u32 header, vpi, vci;
1017         u32 stat;
1018         int i;
1019
1020         stat = le32_to_cpu(rsqe->word_4);
1021
1022         if (stat & SAR_RSQE_IDLE) {
1023                 RXPRINTK("%s: message about inactive connection.\n",
1024                          card->name);
1025                 return;
1026         }
1027
1028         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1029         if (skb == NULL) {
1030                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1031                        card->name, __func__,
1032                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1033                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1034                 return;
1035         }
1036
1037         header = le32_to_cpu(rsqe->word_1);
1038         vpi = (header >> 16) & 0x00ff;
1039         vci = (header >>  0) & 0xffff;
1040
1041         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1042                  card->name, vpi, vci, skb, skb->data);
1043
1044         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1045                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1046                        card->name, vpi, vci);
1047                 recycle_rx_skb(card, skb);
1048                 return;
1049         }
1050
1051         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1052         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1053                 printk("%s: SDU received on non RX vc %u.%u\n",
1054                        card->name, vpi, vci);
1055                 recycle_rx_skb(card, skb);
1056                 return;
1057         }
1058
1059         vcc = vc->rx_vcc;
1060
1061         dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1062                                 skb_end_pointer(skb) - skb->data,
1063                                 DMA_FROM_DEVICE);
1064
1065         if ((vcc->qos.aal == ATM_AAL0) ||
1066             (vcc->qos.aal == ATM_AAL34)) {
1067                 struct sk_buff *sb;
1068                 unsigned char *cell;
1069                 u32 aal0;
1070
1071                 cell = skb->data;
1072                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1073                         if ((sb = dev_alloc_skb(64)) == NULL) {
1074                                 printk("%s: Can't allocate buffers for aal0.\n",
1075                                        card->name);
1076                                 atomic_add(i, &vcc->stats->rx_drop);
1077                                 break;
1078                         }
1079                         if (!atm_charge(vcc, sb->truesize)) {
1080                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1081                                          card->name);
1082                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1083                                 dev_kfree_skb(sb);
1084                                 break;
1085                         }
1086                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1087                                (vci << ATM_HDR_VCI_SHIFT);
1088                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1089                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1090
1091                         *((u32 *) sb->data) = aal0;
1092                         skb_put(sb, sizeof(u32));
1093                         skb_put_data(sb, cell, ATM_CELL_PAYLOAD);
1094
1095                         ATM_SKB(sb)->vcc = vcc;
1096                         __net_timestamp(sb);
1097                         vcc->push(vcc, sb);
1098                         atomic_inc(&vcc->stats->rx);
1099
1100                         cell += ATM_CELL_PAYLOAD;
1101                 }
1102
1103                 recycle_rx_skb(card, skb);
1104                 return;
1105         }
1106         if (vcc->qos.aal != ATM_AAL5) {
1107                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1108                        card->name, vcc->qos.aal);
1109                 recycle_rx_skb(card, skb);
1110                 return;
1111         }
1112         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1113
1114         rpp = &vc->rcv.rx_pool;
1115
1116         __skb_queue_tail(&rpp->queue, skb);
1117         rpp->len += skb->len;
1118
1119         if (stat & SAR_RSQE_EPDU) {
1120                 unsigned char *l1l2;
1121                 unsigned int len;
1122
1123                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1124
1125                 len = (l1l2[0] << 8) | l1l2[1];
1126                 len = len ? len : 0x10000;
1127
1128                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1129
1130                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1131                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1132                                  "(CDC: %08x)\n",
1133                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1134                         recycle_rx_pool_skb(card, rpp);
1135                         atomic_inc(&vcc->stats->rx_err);
1136                         return;
1137                 }
1138                 if (stat & SAR_RSQE_CRC) {
1139                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1140                         recycle_rx_pool_skb(card, rpp);
1141                         atomic_inc(&vcc->stats->rx_err);
1142                         return;
1143                 }
1144                 if (skb_queue_len(&rpp->queue) > 1) {
1145                         struct sk_buff *sb;
1146
1147                         skb = dev_alloc_skb(rpp->len);
1148                         if (!skb) {
1149                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1150                                          card->name);
1151                                 recycle_rx_pool_skb(card, rpp);
1152                                 atomic_inc(&vcc->stats->rx_err);
1153                                 return;
1154                         }
1155                         if (!atm_charge(vcc, skb->truesize)) {
1156                                 recycle_rx_pool_skb(card, rpp);
1157                                 dev_kfree_skb(skb);
1158                                 return;
1159                         }
1160                         skb_queue_walk(&rpp->queue, sb)
1161                                 skb_put_data(skb, sb->data, sb->len);
1162
1163                         recycle_rx_pool_skb(card, rpp);
1164
1165                         skb_trim(skb, len);
1166                         ATM_SKB(skb)->vcc = vcc;
1167                         __net_timestamp(skb);
1168
1169                         vcc->push(vcc, skb);
1170                         atomic_inc(&vcc->stats->rx);
1171
1172                         return;
1173                 }
1174
1175                 flush_rx_pool(card, rpp);
1176
1177                 if (!atm_charge(vcc, skb->truesize)) {
1178                         recycle_rx_skb(card, skb);
1179                         return;
1180                 }
1181
1182                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1183                                  skb_end_pointer(skb) - skb->data,
1184                                  DMA_FROM_DEVICE);
1185                 sb_pool_remove(card, skb);
1186
1187                 skb_trim(skb, len);
1188                 ATM_SKB(skb)->vcc = vcc;
1189                 __net_timestamp(skb);
1190
1191                 vcc->push(vcc, skb);
1192                 atomic_inc(&vcc->stats->rx);
1193
1194                 if (skb->truesize > SAR_FB_SIZE_3)
1195                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1196                 else if (skb->truesize > SAR_FB_SIZE_2)
1197                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1198                 else if (skb->truesize > SAR_FB_SIZE_1)
1199                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1200                 else
1201                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1202                 return;
1203         }
1204 }
1205
1206 static void
1207 idt77252_rx(struct idt77252_dev *card)
1208 {
1209         struct rsq_entry *rsqe;
1210
1211         if (card->rsq.next == card->rsq.last)
1212                 rsqe = card->rsq.base;
1213         else
1214                 rsqe = card->rsq.next + 1;
1215
1216         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1217                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1218                 return;
1219         }
1220
1221         do {
1222                 dequeue_rx(card, rsqe);
1223                 rsqe->word_4 = 0;
1224                 card->rsq.next = rsqe;
1225                 if (card->rsq.next == card->rsq.last)
1226                         rsqe = card->rsq.base;
1227                 else
1228                         rsqe = card->rsq.next + 1;
1229         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1230
1231         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1232                SAR_REG_RSQH);
1233 }
1234
1235 static void
1236 idt77252_rx_raw(struct idt77252_dev *card)
1237 {
1238         struct sk_buff  *queue;
1239         u32             head, tail;
1240         struct atm_vcc  *vcc;
1241         struct vc_map   *vc;
1242         struct sk_buff  *sb;
1243
1244         if (card->raw_cell_head == NULL) {
1245                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1246                 card->raw_cell_head = sb_pool_skb(card, handle);
1247         }
1248
1249         queue = card->raw_cell_head;
1250         if (!queue)
1251                 return;
1252
1253         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1254         tail = readl(SAR_REG_RAWCT);
1255
1256         dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue),
1257                                 skb_end_offset(queue) - 16,
1258                                 DMA_FROM_DEVICE);
1259
1260         while (head != tail) {
1261                 unsigned int vpi, vci;
1262                 u32 header;
1263
1264                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1265
1266                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1267                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1268
1269 #ifdef CONFIG_ATM_IDT77252_DEBUG
1270                 if (debug & DBG_RAW_CELL) {
1271                         int i;
1272
1273                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1274                                card->name, (header >> 28) & 0x000f,
1275                                (header >> 20) & 0x00ff,
1276                                (header >>  4) & 0xffff,
1277                                (header >>  1) & 0x0007,
1278                                (header >>  0) & 0x0001);
1279                         for (i = 16; i < 64; i++)
1280                                 printk(" %02x", queue->data[i]);
1281                         printk("\n");
1282                 }
1283 #endif
1284
1285                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1286                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1287                                 card->name, vpi, vci);
1288                         goto drop;
1289                 }
1290
1291                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1292                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1293                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1294                                 card->name, vpi, vci);
1295                         goto drop;
1296                 }
1297
1298                 vcc = vc->rx_vcc;
1299
1300                 if (vcc->qos.aal != ATM_AAL0) {
1301                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1302                                 card->name, vpi, vci);
1303                         atomic_inc(&vcc->stats->rx_drop);
1304                         goto drop;
1305                 }
1306
1307                 if ((sb = dev_alloc_skb(64)) == NULL) {
1308                         printk("%s: Can't allocate buffers for AAL0.\n",
1309                                card->name);
1310                         atomic_inc(&vcc->stats->rx_err);
1311                         goto drop;
1312                 }
1313
1314                 if (!atm_charge(vcc, sb->truesize)) {
1315                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1316                                  card->name);
1317                         dev_kfree_skb(sb);
1318                         goto drop;
1319                 }
1320
1321                 *((u32 *) sb->data) = header;
1322                 skb_put(sb, sizeof(u32));
1323                 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD);
1324
1325                 ATM_SKB(sb)->vcc = vcc;
1326                 __net_timestamp(sb);
1327                 vcc->push(vcc, sb);
1328                 atomic_inc(&vcc->stats->rx);
1329
1330 drop:
1331                 skb_pull(queue, 64);
1332
1333                 head = IDT77252_PRV_PADDR(queue)
1334                                         + (queue->data - queue->head - 16);
1335
1336                 if (queue->len < 128) {
1337                         struct sk_buff *next;
1338                         u32 handle;
1339
1340                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1341                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1342
1343                         next = sb_pool_skb(card, handle);
1344                         recycle_rx_skb(card, queue);
1345
1346                         if (next) {
1347                                 card->raw_cell_head = next;
1348                                 queue = card->raw_cell_head;
1349                                 dma_sync_single_for_cpu(&card->pcidev->dev,
1350                                                         IDT77252_PRV_PADDR(queue),
1351                                                         (skb_end_pointer(queue) -
1352                                                          queue->data),
1353                                                         DMA_FROM_DEVICE);
1354                         } else {
1355                                 card->raw_cell_head = NULL;
1356                                 printk("%s: raw cell queue overrun\n",
1357                                        card->name);
1358                                 break;
1359                         }
1360                 }
1361         }
1362 }
1363
1364
1365 /*****************************************************************************/
1366 /*                                                                           */
1367 /* TSQ Handling                                                              */
1368 /*                                                                           */
1369 /*****************************************************************************/
1370
1371 static int
1372 init_tsq(struct idt77252_dev *card)
1373 {
1374         struct tsq_entry *tsqe;
1375
1376         card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
1377                                             &card->tsq.paddr, GFP_KERNEL);
1378         if (card->tsq.base == NULL) {
1379                 printk("%s: can't allocate TSQ.\n", card->name);
1380                 return -1;
1381         }
1382         memset(card->tsq.base, 0, TSQSIZE);
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_level(struct idt77252_dev *card, int queue)
1788 {
1789         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1790 }
1791
1792 static __inline__ int
1793 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1794 {
1795         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1796 }
1797
1798 static int
1799 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1800 {
1801         unsigned long flags;
1802         u32 handle;
1803         u32 addr;
1804
1805         skb->data = skb->head;
1806         skb_reset_tail_pointer(skb);
1807         skb->len = 0;
1808
1809         skb_reserve(skb, 16);
1810
1811         switch (queue) {
1812         case 0:
1813                 skb_put(skb, SAR_FB_SIZE_0);
1814                 break;
1815         case 1:
1816                 skb_put(skb, SAR_FB_SIZE_1);
1817                 break;
1818         case 2:
1819                 skb_put(skb, SAR_FB_SIZE_2);
1820                 break;
1821         case 3:
1822                 skb_put(skb, SAR_FB_SIZE_3);
1823                 break;
1824         default:
1825                 return -1;
1826         }
1827
1828         if (idt77252_fbq_full(card, queue))
1829                 return -1;
1830
1831         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1832
1833         handle = IDT77252_PRV_POOL(skb);
1834         addr = IDT77252_PRV_PADDR(skb);
1835
1836         spin_lock_irqsave(&card->cmd_lock, flags);
1837         writel(handle, card->fbq[queue]);
1838         writel(addr, card->fbq[queue]);
1839         spin_unlock_irqrestore(&card->cmd_lock, flags);
1840
1841         return 0;
1842 }
1843
1844 static void
1845 add_rx_skb(struct idt77252_dev *card, int queue,
1846            unsigned int size, unsigned int count)
1847 {
1848         struct sk_buff *skb;
1849         dma_addr_t paddr;
1850         u32 handle;
1851
1852         while (count--) {
1853                 skb = dev_alloc_skb(size);
1854                 if (!skb)
1855                         return;
1856
1857                 if (sb_pool_add(card, skb, queue)) {
1858                         printk("%s: SB POOL full\n", __func__);
1859                         goto outfree;
1860                 }
1861
1862                 paddr = dma_map_single(&card->pcidev->dev, skb->data,
1863                                        skb_end_pointer(skb) - skb->data,
1864                                        DMA_FROM_DEVICE);
1865                 IDT77252_PRV_PADDR(skb) = paddr;
1866
1867                 if (push_rx_skb(card, skb, queue)) {
1868                         printk("%s: FB QUEUE full\n", __func__);
1869                         goto outunmap;
1870                 }
1871         }
1872
1873         return;
1874
1875 outunmap:
1876         dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1877                          skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE);
1878
1879         handle = IDT77252_PRV_POOL(skb);
1880         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1881
1882 outfree:
1883         dev_kfree_skb(skb);
1884 }
1885
1886
1887 static void
1888 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1889 {
1890         u32 handle = IDT77252_PRV_POOL(skb);
1891         int err;
1892
1893         dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1894                                    skb_end_pointer(skb) - skb->data,
1895                                    DMA_FROM_DEVICE);
1896
1897         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1898         if (err) {
1899                 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1900                                  skb_end_pointer(skb) - skb->data,
1901                                  DMA_FROM_DEVICE);
1902                 sb_pool_remove(card, skb);
1903                 dev_kfree_skb(skb);
1904         }
1905 }
1906
1907 static void
1908 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1909 {
1910         skb_queue_head_init(&rpp->queue);
1911         rpp->len = 0;
1912 }
1913
1914 static void
1915 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1916 {
1917         struct sk_buff *skb, *tmp;
1918
1919         skb_queue_walk_safe(&rpp->queue, skb, tmp)
1920                 recycle_rx_skb(card, skb);
1921
1922         flush_rx_pool(card, rpp);
1923 }
1924
1925 /*****************************************************************************/
1926 /*                                                                           */
1927 /* ATM Interface                                                             */
1928 /*                                                                           */
1929 /*****************************************************************************/
1930
1931 static void
1932 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1933 {
1934         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1935 }
1936
1937 static unsigned char
1938 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1939 {
1940         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1941 }
1942
1943 static inline int
1944 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1945 {
1946         struct atm_dev *dev = vcc->dev;
1947         struct idt77252_dev *card = dev->dev_data;
1948         struct vc_map *vc = vcc->dev_data;
1949         int err;
1950
1951         if (vc == NULL) {
1952                 printk("%s: NULL connection in send().\n", card->name);
1953                 atomic_inc(&vcc->stats->tx_err);
1954                 dev_kfree_skb(skb);
1955                 return -EINVAL;
1956         }
1957         if (!test_bit(VCF_TX, &vc->flags)) {
1958                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1959                 atomic_inc(&vcc->stats->tx_err);
1960                 dev_kfree_skb(skb);
1961                 return -EINVAL;
1962         }
1963
1964         switch (vcc->qos.aal) {
1965         case ATM_AAL0:
1966         case ATM_AAL1:
1967         case ATM_AAL5:
1968                 break;
1969         default:
1970                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1971                 atomic_inc(&vcc->stats->tx_err);
1972                 dev_kfree_skb(skb);
1973                 return -EINVAL;
1974         }
1975
1976         if (skb_shinfo(skb)->nr_frags != 0) {
1977                 printk("%s: No scatter-gather yet.\n", card->name);
1978                 atomic_inc(&vcc->stats->tx_err);
1979                 dev_kfree_skb(skb);
1980                 return -EINVAL;
1981         }
1982         ATM_SKB(skb)->vcc = vcc;
1983
1984         err = queue_skb(card, vc, skb, oam);
1985         if (err) {
1986                 atomic_inc(&vcc->stats->tx_err);
1987                 dev_kfree_skb(skb);
1988                 return err;
1989         }
1990
1991         return 0;
1992 }
1993
1994 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1995 {
1996         return idt77252_send_skb(vcc, skb, 0);
1997 }
1998
1999 static int
2000 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2001 {
2002         struct atm_dev *dev = vcc->dev;
2003         struct idt77252_dev *card = dev->dev_data;
2004         struct sk_buff *skb;
2005
2006         skb = dev_alloc_skb(64);
2007         if (!skb) {
2008                 printk("%s: Out of memory in send_oam().\n", card->name);
2009                 atomic_inc(&vcc->stats->tx_err);
2010                 return -ENOMEM;
2011         }
2012         refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2013
2014         skb_put_data(skb, cell, 52);
2015
2016         return idt77252_send_skb(vcc, skb, 1);
2017 }
2018
2019 static __inline__ unsigned int
2020 idt77252_fls(unsigned int x)
2021 {
2022         int r = 1;
2023
2024         if (x == 0)
2025                 return 0;
2026         if (x & 0xffff0000) {
2027                 x >>= 16;
2028                 r += 16;
2029         }
2030         if (x & 0xff00) {
2031                 x >>= 8;
2032                 r += 8;
2033         }
2034         if (x & 0xf0) {
2035                 x >>= 4;
2036                 r += 4;
2037         }
2038         if (x & 0xc) {
2039                 x >>= 2;
2040                 r += 2;
2041         }
2042         if (x & 0x2)
2043                 r += 1;
2044         return r;
2045 }
2046
2047 static u16
2048 idt77252_int_to_atmfp(unsigned int rate)
2049 {
2050         u16 m, e;
2051
2052         if (rate == 0)
2053                 return 0;
2054         e = idt77252_fls(rate) - 1;
2055         if (e < 9)
2056                 m = (rate - (1 << e)) << (9 - e);
2057         else if (e == 9)
2058                 m = (rate - (1 << e));
2059         else /* e > 9 */
2060                 m = (rate - (1 << e)) >> (e - 9);
2061         return 0x4000 | (e << 9) | m;
2062 }
2063
2064 static u8
2065 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2066 {
2067         u16 afp;
2068
2069         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2070         if (pcr < 0)
2071                 return rate_to_log[(afp >> 5) & 0x1ff];
2072         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2073 }
2074
2075 static void
2076 idt77252_est_timer(struct timer_list *t)
2077 {
2078         struct rate_estimator *est = from_timer(est, t, timer);
2079         struct vc_map *vc = est->vc;
2080         struct idt77252_dev *card = vc->card;
2081         unsigned long flags;
2082         u32 rate, cps;
2083         u64 ncells;
2084         u8 lacr;
2085
2086         spin_lock_irqsave(&vc->lock, flags);
2087         if (!vc->estimator)
2088                 goto out;
2089         ncells = est->cells;
2090
2091         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2092         est->last_cells = ncells;
2093         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2094         est->cps = (est->avcps + 0x1f) >> 5;
2095
2096         cps = est->cps;
2097         if (cps < (est->maxcps >> 4))
2098                 cps = est->maxcps >> 4;
2099
2100         lacr = idt77252_rate_logindex(card, cps);
2101         if (lacr > vc->max_er)
2102                 lacr = vc->max_er;
2103
2104         if (lacr != vc->lacr) {
2105                 vc->lacr = lacr;
2106                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2107         }
2108
2109         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2110         add_timer(&est->timer);
2111
2112 out:
2113         spin_unlock_irqrestore(&vc->lock, flags);
2114 }
2115
2116 static struct rate_estimator *
2117 idt77252_init_est(struct vc_map *vc, int pcr)
2118 {
2119         struct rate_estimator *est;
2120
2121         est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2122         if (!est)
2123                 return NULL;
2124         est->maxcps = pcr < 0 ? -pcr : pcr;
2125         est->cps = est->maxcps;
2126         est->avcps = est->cps << 5;
2127         est->vc = vc;
2128
2129         est->interval = 2;              /* XXX: make this configurable */
2130         est->ewma_log = 2;              /* XXX: make this configurable */
2131         timer_setup(&est->timer, idt77252_est_timer, 0);
2132         mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval));
2133
2134         return est;
2135 }
2136
2137 static int
2138 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2139                   struct atm_vcc *vcc, struct atm_qos *qos)
2140 {
2141         int tst_free, tst_used, tst_entries;
2142         unsigned long tmpl, modl;
2143         int tcr, tcra;
2144
2145         if ((qos->txtp.max_pcr == 0) &&
2146             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2147                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2148                        card->name);
2149                 return -EINVAL;
2150         }
2151
2152         tst_used = 0;
2153         tst_free = card->tst_free;
2154         if (test_bit(VCF_TX, &vc->flags))
2155                 tst_used = vc->ntste;
2156         tst_free += tst_used;
2157
2158         tcr = atm_pcr_goal(&qos->txtp);
2159         tcra = tcr >= 0 ? tcr : -tcr;
2160
2161         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2162
2163         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2164         modl = tmpl % (unsigned long)card->utopia_pcr;
2165
2166         tst_entries = (int) (tmpl / card->utopia_pcr);
2167         if (tcr > 0) {
2168                 if (modl > 0)
2169                         tst_entries++;
2170         } else if (tcr == 0) {
2171                 tst_entries = tst_free - SAR_TST_RESERVED;
2172                 if (tst_entries <= 0) {
2173                         printk("%s: no CBR bandwidth free.\n", card->name);
2174                         return -ENOSR;
2175                 }
2176         }
2177
2178         if (tst_entries == 0) {
2179                 printk("%s: selected CBR bandwidth < granularity.\n",
2180                        card->name);
2181                 return -EINVAL;
2182         }
2183
2184         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2185                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2186                 return -ENOSR;
2187         }
2188
2189         vc->ntste = tst_entries;
2190
2191         card->tst_free = tst_free - tst_entries;
2192         if (test_bit(VCF_TX, &vc->flags)) {
2193                 if (tst_used == tst_entries)
2194                         return 0;
2195
2196                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2197                         card->name, tst_used, tst_entries);
2198                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2199                 return 0;
2200         }
2201
2202         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2203         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2204         return 0;
2205 }
2206
2207 static int
2208 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2209                   struct atm_vcc *vcc, struct atm_qos *qos)
2210 {
2211         struct rate_estimator *est = NULL;
2212         unsigned long flags;
2213         int tcr;
2214
2215         spin_lock_irqsave(&vc->lock, flags);
2216         if (vc->estimator) {
2217                 est = vc->estimator;
2218                 vc->estimator = NULL;
2219         }
2220         spin_unlock_irqrestore(&vc->lock, flags);
2221         if (est) {
2222                 del_timer_sync(&est->timer);
2223                 kfree(est);
2224         }
2225
2226         tcr = atm_pcr_goal(&qos->txtp);
2227         if (tcr == 0)
2228                 tcr = card->link_pcr;
2229
2230         vc->estimator = idt77252_init_est(vc, tcr);
2231
2232         vc->class = SCHED_UBR;
2233         vc->init_er = idt77252_rate_logindex(card, tcr);
2234         vc->lacr = vc->init_er;
2235         if (tcr < 0)
2236                 vc->max_er = vc->init_er;
2237         else
2238                 vc->max_er = 0xff;
2239
2240         return 0;
2241 }
2242
2243 static int
2244 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2245                  struct atm_vcc *vcc, struct atm_qos *qos)
2246 {
2247         int error;
2248
2249         if (test_bit(VCF_TX, &vc->flags))
2250                 return -EBUSY;
2251
2252         switch (qos->txtp.traffic_class) {
2253                 case ATM_CBR:
2254                         vc->class = SCHED_CBR;
2255                         break;
2256
2257                 case ATM_UBR:
2258                         vc->class = SCHED_UBR;
2259                         break;
2260
2261                 case ATM_VBR:
2262                 case ATM_ABR:
2263                 default:
2264                         return -EPROTONOSUPPORT;
2265         }
2266
2267         vc->scq = alloc_scq(card, vc->class);
2268         if (!vc->scq) {
2269                 printk("%s: can't get SCQ.\n", card->name);
2270                 return -ENOMEM;
2271         }
2272
2273         vc->scq->scd = get_free_scd(card, vc);
2274         if (vc->scq->scd == 0) {
2275                 printk("%s: no SCD available.\n", card->name);
2276                 free_scq(card, vc->scq);
2277                 return -ENOMEM;
2278         }
2279
2280         fill_scd(card, vc->scq, vc->class);
2281
2282         if (set_tct(card, vc)) {
2283                 printk("%s: class %d not supported.\n",
2284                        card->name, qos->txtp.traffic_class);
2285
2286                 card->scd2vc[vc->scd_index] = NULL;
2287                 free_scq(card, vc->scq);
2288                 return -EPROTONOSUPPORT;
2289         }
2290
2291         switch (vc->class) {
2292                 case SCHED_CBR:
2293                         error = idt77252_init_cbr(card, vc, vcc, qos);
2294                         if (error) {
2295                                 card->scd2vc[vc->scd_index] = NULL;
2296                                 free_scq(card, vc->scq);
2297                                 return error;
2298                         }
2299
2300                         clear_bit(VCF_IDLE, &vc->flags);
2301                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2302                         break;
2303
2304                 case SCHED_UBR:
2305                         error = idt77252_init_ubr(card, vc, vcc, qos);
2306                         if (error) {
2307                                 card->scd2vc[vc->scd_index] = NULL;
2308                                 free_scq(card, vc->scq);
2309                                 return error;
2310                         }
2311
2312                         set_bit(VCF_IDLE, &vc->flags);
2313                         break;
2314         }
2315
2316         vc->tx_vcc = vcc;
2317         set_bit(VCF_TX, &vc->flags);
2318         return 0;
2319 }
2320
2321 static int
2322 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2323                  struct atm_vcc *vcc, struct atm_qos *qos)
2324 {
2325         unsigned long flags;
2326         unsigned long addr;
2327         u32 rcte = 0;
2328
2329         if (test_bit(VCF_RX, &vc->flags))
2330                 return -EBUSY;
2331
2332         vc->rx_vcc = vcc;
2333         set_bit(VCF_RX, &vc->flags);
2334
2335         if ((vcc->vci == 3) || (vcc->vci == 4))
2336                 return 0;
2337
2338         flush_rx_pool(card, &vc->rcv.rx_pool);
2339
2340         rcte |= SAR_RCTE_CONNECTOPEN;
2341         rcte |= SAR_RCTE_RAWCELLINTEN;
2342
2343         switch (qos->aal) {
2344                 case ATM_AAL0:
2345                         rcte |= SAR_RCTE_RCQ;
2346                         break;
2347                 case ATM_AAL1:
2348                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2349                         break;
2350                 case ATM_AAL34:
2351                         rcte |= SAR_RCTE_AAL34;
2352                         break;
2353                 case ATM_AAL5:
2354                         rcte |= SAR_RCTE_AAL5;
2355                         break;
2356                 default:
2357                         rcte |= SAR_RCTE_RCQ;
2358                         break;
2359         }
2360
2361         if (qos->aal != ATM_AAL5)
2362                 rcte |= SAR_RCTE_FBP_1;
2363         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2364                 rcte |= SAR_RCTE_FBP_3;
2365         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2366                 rcte |= SAR_RCTE_FBP_2;
2367         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2368                 rcte |= SAR_RCTE_FBP_1;
2369         else
2370                 rcte |= SAR_RCTE_FBP_01;
2371
2372         addr = card->rct_base + (vc->index << 2);
2373
2374         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2375         write_sram(card, addr, rcte);
2376
2377         spin_lock_irqsave(&card->cmd_lock, flags);
2378         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2379         waitfor_idle(card);
2380         spin_unlock_irqrestore(&card->cmd_lock, flags);
2381
2382         return 0;
2383 }
2384
2385 static int
2386 idt77252_open(struct atm_vcc *vcc)
2387 {
2388         struct atm_dev *dev = vcc->dev;
2389         struct idt77252_dev *card = dev->dev_data;
2390         struct vc_map *vc;
2391         unsigned int index;
2392         unsigned int inuse;
2393         int error;
2394         int vci = vcc->vci;
2395         short vpi = vcc->vpi;
2396
2397         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2398                 return 0;
2399
2400         if (vpi >= (1 << card->vpibits)) {
2401                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2402                 return -EINVAL;
2403         }
2404
2405         if (vci >= (1 << card->vcibits)) {
2406                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2407                 return -EINVAL;
2408         }
2409
2410         set_bit(ATM_VF_ADDR, &vcc->flags);
2411
2412         mutex_lock(&card->mutex);
2413
2414         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2415
2416         switch (vcc->qos.aal) {
2417         case ATM_AAL0:
2418         case ATM_AAL1:
2419         case ATM_AAL5:
2420                 break;
2421         default:
2422                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2423                 mutex_unlock(&card->mutex);
2424                 return -EPROTONOSUPPORT;
2425         }
2426
2427         index = VPCI2VC(card, vpi, vci);
2428         if (!card->vcs[index]) {
2429                 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2430                 if (!card->vcs[index]) {
2431                         printk("%s: can't alloc vc in open()\n", card->name);
2432                         mutex_unlock(&card->mutex);
2433                         return -ENOMEM;
2434                 }
2435                 card->vcs[index]->card = card;
2436                 card->vcs[index]->index = index;
2437
2438                 spin_lock_init(&card->vcs[index]->lock);
2439         }
2440         vc = card->vcs[index];
2441
2442         vcc->dev_data = vc;
2443
2444         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2445                 card->name, vc->index, vcc->vpi, vcc->vci,
2446                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2447                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2448                 vcc->qos.rxtp.max_sdu);
2449
2450         inuse = 0;
2451         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2452             test_bit(VCF_TX, &vc->flags))
2453                 inuse = 1;
2454         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2455             test_bit(VCF_RX, &vc->flags))
2456                 inuse += 2;
2457
2458         if (inuse) {
2459                 printk("%s: %s vci already in use.\n", card->name,
2460                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2461                 mutex_unlock(&card->mutex);
2462                 return -EADDRINUSE;
2463         }
2464
2465         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2466                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2467                 if (error) {
2468                         mutex_unlock(&card->mutex);
2469                         return error;
2470                 }
2471         }
2472
2473         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2474                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2475                 if (error) {
2476                         mutex_unlock(&card->mutex);
2477                         return error;
2478                 }
2479         }
2480
2481         set_bit(ATM_VF_READY, &vcc->flags);
2482
2483         mutex_unlock(&card->mutex);
2484         return 0;
2485 }
2486
2487 static void
2488 idt77252_close(struct atm_vcc *vcc)
2489 {
2490         struct atm_dev *dev = vcc->dev;
2491         struct idt77252_dev *card = dev->dev_data;
2492         struct vc_map *vc = vcc->dev_data;
2493         unsigned long flags;
2494         unsigned long addr;
2495         unsigned long timeout;
2496
2497         mutex_lock(&card->mutex);
2498
2499         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2500                 card->name, vc->index, vcc->vpi, vcc->vci);
2501
2502         clear_bit(ATM_VF_READY, &vcc->flags);
2503
2504         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2505
2506                 spin_lock_irqsave(&vc->lock, flags);
2507                 clear_bit(VCF_RX, &vc->flags);
2508                 vc->rx_vcc = NULL;
2509                 spin_unlock_irqrestore(&vc->lock, flags);
2510
2511                 if ((vcc->vci == 3) || (vcc->vci == 4))
2512                         goto done;
2513
2514                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2515
2516                 spin_lock_irqsave(&card->cmd_lock, flags);
2517                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2518                 waitfor_idle(card);
2519                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2520
2521                 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2522                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2523                                 card->name);
2524
2525                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2526                 }
2527         }
2528
2529 done:
2530         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2531
2532                 spin_lock_irqsave(&vc->lock, flags);
2533                 clear_bit(VCF_TX, &vc->flags);
2534                 clear_bit(VCF_IDLE, &vc->flags);
2535                 clear_bit(VCF_RSV, &vc->flags);
2536                 vc->tx_vcc = NULL;
2537
2538                 if (vc->estimator) {
2539                         del_timer(&vc->estimator->timer);
2540                         kfree(vc->estimator);
2541                         vc->estimator = NULL;
2542                 }
2543                 spin_unlock_irqrestore(&vc->lock, flags);
2544
2545                 timeout = 5 * 1000;
2546                 while (atomic_read(&vc->scq->used) > 0) {
2547                         timeout = msleep_interruptible(timeout);
2548                         if (!timeout) {
2549                                 pr_warn("%s: SCQ drain timeout: %u used\n",
2550                                         card->name, atomic_read(&vc->scq->used));
2551                                 break;
2552                         }
2553                 }
2554
2555                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2556                 clear_scd(card, vc->scq, vc->class);
2557
2558                 if (vc->class == SCHED_CBR) {
2559                         clear_tst(card, vc);
2560                         card->tst_free += vc->ntste;
2561                         vc->ntste = 0;
2562                 }
2563
2564                 card->scd2vc[vc->scd_index] = NULL;
2565                 free_scq(card, vc->scq);
2566         }
2567
2568         mutex_unlock(&card->mutex);
2569 }
2570
2571 static int
2572 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2573 {
2574         struct atm_dev *dev = vcc->dev;
2575         struct idt77252_dev *card = dev->dev_data;
2576         struct vc_map *vc = vcc->dev_data;
2577         int error = 0;
2578
2579         mutex_lock(&card->mutex);
2580
2581         if (qos->txtp.traffic_class != ATM_NONE) {
2582                 if (!test_bit(VCF_TX, &vc->flags)) {
2583                         error = idt77252_init_tx(card, vc, vcc, qos);
2584                         if (error)
2585                                 goto out;
2586                 } else {
2587                         switch (qos->txtp.traffic_class) {
2588                         case ATM_CBR:
2589                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2590                                 if (error)
2591                                         goto out;
2592                                 break;
2593
2594                         case ATM_UBR:
2595                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2596                                 if (error)
2597                                         goto out;
2598
2599                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2600                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2601                                                vc->index, SAR_REG_TCMDQ);
2602                                 }
2603                                 break;
2604
2605                         case ATM_VBR:
2606                         case ATM_ABR:
2607                                 error = -EOPNOTSUPP;
2608                                 goto out;
2609                         }
2610                 }
2611         }
2612
2613         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2614             !test_bit(VCF_RX, &vc->flags)) {
2615                 error = idt77252_init_rx(card, vc, vcc, qos);
2616                 if (error)
2617                         goto out;
2618         }
2619
2620         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2621
2622         set_bit(ATM_VF_HASQOS, &vcc->flags);
2623
2624 out:
2625         mutex_unlock(&card->mutex);
2626         return error;
2627 }
2628
2629 static int
2630 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2631 {
2632         struct idt77252_dev *card = dev->dev_data;
2633         int i, left;
2634
2635         left = (int) *pos;
2636         if (!left--)
2637                 return sprintf(page, "IDT77252 Interrupts:\n");
2638         if (!left--)
2639                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2640         if (!left--)
2641                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2642         if (!left--)
2643                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2644         if (!left--)
2645                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2646         if (!left--)
2647                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2648         if (!left--)
2649                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2650         if (!left--)
2651                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2652         if (!left--)
2653                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2654         if (!left--)
2655                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2656         if (!left--)
2657                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2658         if (!left--)
2659                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2660         if (!left--)
2661                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2662         if (!left--)
2663                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2664         if (!left--)
2665                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2666
2667         for (i = 0; i < card->tct_size; i++) {
2668                 unsigned long tct;
2669                 struct atm_vcc *vcc;
2670                 struct vc_map *vc;
2671                 char *p;
2672
2673                 vc = card->vcs[i];
2674                 if (!vc)
2675                         continue;
2676
2677                 vcc = NULL;
2678                 if (vc->tx_vcc)
2679                         vcc = vc->tx_vcc;
2680                 if (!vcc)
2681                         continue;
2682                 if (left--)
2683                         continue;
2684
2685                 p = page;
2686                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2687                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2688
2689                 for (i = 0; i < 8; i++)
2690                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2691                 p += sprintf(p, "\n");
2692                 return p - page;
2693         }
2694         return 0;
2695 }
2696
2697 /*****************************************************************************/
2698 /*                                                                           */
2699 /* Interrupt handler                                                         */
2700 /*                                                                           */
2701 /*****************************************************************************/
2702
2703 static void
2704 idt77252_collect_stat(struct idt77252_dev *card)
2705 {
2706         (void) readl(SAR_REG_CDC);
2707         (void) readl(SAR_REG_VPEC);
2708         (void) readl(SAR_REG_ICC);
2709
2710 }
2711
2712 static irqreturn_t
2713 idt77252_interrupt(int irq, void *dev_id)
2714 {
2715         struct idt77252_dev *card = dev_id;
2716         u32 stat;
2717
2718         stat = readl(SAR_REG_STAT) & 0xffff;
2719         if (!stat)      /* no interrupt for us */
2720                 return IRQ_NONE;
2721
2722         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2723                 printk("%s: Re-entering irq_handler()\n", card->name);
2724                 goto out;
2725         }
2726
2727         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2728
2729         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2730                 INTPRINTK("%s: TSIF\n", card->name);
2731                 card->irqstat[15]++;
2732                 idt77252_tx(card);
2733         }
2734         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2735                 INTPRINTK("%s: TXICP\n", card->name);
2736                 card->irqstat[14]++;
2737 #ifdef CONFIG_ATM_IDT77252_DEBUG
2738                 idt77252_tx_dump(card);
2739 #endif
2740         }
2741         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2742                 INTPRINTK("%s: TSQF\n", card->name);
2743                 card->irqstat[12]++;
2744                 idt77252_tx(card);
2745         }
2746         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2747                 INTPRINTK("%s: TMROF\n", card->name);
2748                 card->irqstat[11]++;
2749                 idt77252_collect_stat(card);
2750         }
2751
2752         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2753                 INTPRINTK("%s: EPDU\n", card->name);
2754                 card->irqstat[5]++;
2755                 idt77252_rx(card);
2756         }
2757         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2758                 INTPRINTK("%s: RSQAF\n", card->name);
2759                 card->irqstat[1]++;
2760                 idt77252_rx(card);
2761         }
2762         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2763                 INTPRINTK("%s: RSQF\n", card->name);
2764                 card->irqstat[6]++;
2765                 idt77252_rx(card);
2766         }
2767         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2768                 INTPRINTK("%s: RAWCF\n", card->name);
2769                 card->irqstat[4]++;
2770                 idt77252_rx_raw(card);
2771         }
2772
2773         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2774                 INTPRINTK("%s: PHYI", card->name);
2775                 card->irqstat[10]++;
2776                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2777                         card->atmdev->phy->interrupt(card->atmdev);
2778         }
2779
2780         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2781                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2782
2783                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2784
2785                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2786
2787                 if (stat & SAR_STAT_FBQ0A)
2788                         card->irqstat[2]++;
2789                 if (stat & SAR_STAT_FBQ1A)
2790                         card->irqstat[3]++;
2791                 if (stat & SAR_STAT_FBQ2A)
2792                         card->irqstat[7]++;
2793                 if (stat & SAR_STAT_FBQ3A)
2794                         card->irqstat[8]++;
2795
2796                 schedule_work(&card->tqueue);
2797         }
2798
2799 out:
2800         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2801         return IRQ_HANDLED;
2802 }
2803
2804 static void
2805 idt77252_softint(struct work_struct *work)
2806 {
2807         struct idt77252_dev *card =
2808                 container_of(work, struct idt77252_dev, tqueue);
2809         u32 stat;
2810         int done;
2811
2812         for (done = 1; ; done = 1) {
2813                 stat = readl(SAR_REG_STAT) >> 16;
2814
2815                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2816                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2817                         done = 0;
2818                 }
2819
2820                 stat >>= 4;
2821                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2822                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2823                         done = 0;
2824                 }
2825
2826                 stat >>= 4;
2827                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2828                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2829                         done = 0;
2830                 }
2831
2832                 stat >>= 4;
2833                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2834                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2835                         done = 0;
2836                 }
2837
2838                 if (done)
2839                         break;
2840         }
2841
2842         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2843 }
2844
2845
2846 static int
2847 open_card_oam(struct idt77252_dev *card)
2848 {
2849         unsigned long flags;
2850         unsigned long addr;
2851         struct vc_map *vc;
2852         int vpi, vci;
2853         int index;
2854         u32 rcte;
2855
2856         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2857                 for (vci = 3; vci < 5; vci++) {
2858                         index = VPCI2VC(card, vpi, vci);
2859
2860                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2861                         if (!vc) {
2862                                 printk("%s: can't alloc vc\n", card->name);
2863                                 return -ENOMEM;
2864                         }
2865                         vc->index = index;
2866                         card->vcs[index] = vc;
2867
2868                         flush_rx_pool(card, &vc->rcv.rx_pool);
2869
2870                         rcte = SAR_RCTE_CONNECTOPEN |
2871                                SAR_RCTE_RAWCELLINTEN |
2872                                SAR_RCTE_RCQ |
2873                                SAR_RCTE_FBP_1;
2874
2875                         addr = card->rct_base + (vc->index << 2);
2876                         write_sram(card, addr, rcte);
2877
2878                         spin_lock_irqsave(&card->cmd_lock, flags);
2879                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2880                                SAR_REG_CMD);
2881                         waitfor_idle(card);
2882                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2883                 }
2884         }
2885
2886         return 0;
2887 }
2888
2889 static void
2890 close_card_oam(struct idt77252_dev *card)
2891 {
2892         unsigned long flags;
2893         unsigned long addr;
2894         struct vc_map *vc;
2895         int vpi, vci;
2896         int index;
2897
2898         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2899                 for (vci = 3; vci < 5; vci++) {
2900                         index = VPCI2VC(card, vpi, vci);
2901                         vc = card->vcs[index];
2902
2903                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2904
2905                         spin_lock_irqsave(&card->cmd_lock, flags);
2906                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2907                                SAR_REG_CMD);
2908                         waitfor_idle(card);
2909                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2910
2911                         if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2912                                 DPRINTK("%s: closing a VC "
2913                                         "with pending rx buffers.\n",
2914                                         card->name);
2915
2916                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2917                         }
2918                 }
2919         }
2920 }
2921
2922 static int
2923 open_card_ubr0(struct idt77252_dev *card)
2924 {
2925         struct vc_map *vc;
2926
2927         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2928         if (!vc) {
2929                 printk("%s: can't alloc vc\n", card->name);
2930                 return -ENOMEM;
2931         }
2932         card->vcs[0] = vc;
2933         vc->class = SCHED_UBR0;
2934
2935         vc->scq = alloc_scq(card, vc->class);
2936         if (!vc->scq) {
2937                 printk("%s: can't get SCQ.\n", card->name);
2938                 return -ENOMEM;
2939         }
2940
2941         card->scd2vc[0] = vc;
2942         vc->scd_index = 0;
2943         vc->scq->scd = card->scd_base;
2944
2945         fill_scd(card, vc->scq, vc->class);
2946
2947         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2948         write_sram(card, card->tct_base + 1, 0);
2949         write_sram(card, card->tct_base + 2, 0);
2950         write_sram(card, card->tct_base + 3, 0);
2951         write_sram(card, card->tct_base + 4, 0);
2952         write_sram(card, card->tct_base + 5, 0);
2953         write_sram(card, card->tct_base + 6, 0);
2954         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2955
2956         clear_bit(VCF_IDLE, &vc->flags);
2957         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2958         return 0;
2959 }
2960
2961 static int
2962 idt77252_dev_open(struct idt77252_dev *card)
2963 {
2964         u32 conf;
2965
2966         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2967                 printk("%s: SAR not yet initialized.\n", card->name);
2968                 return -1;
2969         }
2970
2971         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
2972             SAR_RX_DELAY |      /* interrupt on complete PDU            */
2973             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
2974             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
2975             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
2976             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
2977             SAR_CFG_TXEN |      /* transmit operation enable            */
2978             SAR_CFG_TXINT |     /* interrupt on transmit status         */
2979             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
2980             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
2981             SAR_CFG_PHYIE       /* enable PHY interrupts                */
2982             ;
2983
2984 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2985         /* Test RAW cell receive. */
2986         conf |= SAR_CFG_VPECA;
2987 #endif
2988
2989         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2990
2991         if (open_card_oam(card)) {
2992                 printk("%s: Error initializing OAM.\n", card->name);
2993                 return -1;
2994         }
2995
2996         if (open_card_ubr0(card)) {
2997                 printk("%s: Error initializing UBR0.\n", card->name);
2998                 return -1;
2999         }
3000
3001         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3002         return 0;
3003 }
3004
3005 static void idt77252_dev_close(struct atm_dev *dev)
3006 {
3007         struct idt77252_dev *card = dev->dev_data;
3008         u32 conf;
3009
3010         close_card_oam(card);
3011
3012         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3013             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3014             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3015             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3016             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3017             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3018             SAR_CFG_TXEN |      /* transmit operation enable     */
3019             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3020             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3021             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3022             ;
3023
3024         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3025
3026         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3027 }
3028
3029
3030 /*****************************************************************************/
3031 /*                                                                           */
3032 /* Initialisation and Deinitialization of IDT77252                           */
3033 /*                                                                           */
3034 /*****************************************************************************/
3035
3036
3037 static void
3038 deinit_card(struct idt77252_dev *card)
3039 {
3040         struct sk_buff *skb;
3041         int i, j;
3042
3043         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3044                 printk("%s: SAR not yet initialized.\n", card->name);
3045                 return;
3046         }
3047         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3048
3049         writel(0, SAR_REG_CFG);
3050
3051         if (card->atmdev)
3052                 atm_dev_deregister(card->atmdev);
3053
3054         for (i = 0; i < 4; i++) {
3055                 for (j = 0; j < FBQ_SIZE; j++) {
3056                         skb = card->sbpool[i].skb[j];
3057                         if (skb) {
3058                                 dma_unmap_single(&card->pcidev->dev,
3059                                                  IDT77252_PRV_PADDR(skb),
3060                                                  (skb_end_pointer(skb) -
3061                                                   skb->data),
3062                                                  DMA_FROM_DEVICE);
3063                                 card->sbpool[i].skb[j] = NULL;
3064                                 dev_kfree_skb(skb);
3065                         }
3066                 }
3067         }
3068
3069         vfree(card->soft_tst);
3070
3071         vfree(card->scd2vc);
3072
3073         vfree(card->vcs);
3074
3075         if (card->raw_cell_hnd) {
3076                 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32),
3077                                   card->raw_cell_hnd, card->raw_cell_paddr);
3078         }
3079
3080         if (card->rsq.base) {
3081                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3082                 deinit_rsq(card);
3083         }
3084
3085         if (card->tsq.base) {
3086                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3087                 deinit_tsq(card);
3088         }
3089
3090         DIPRINTK("idt77252: Release IRQ.\n");
3091         free_irq(card->pcidev->irq, card);
3092
3093         for (i = 0; i < 4; i++) {
3094                 if (card->fbq[i])
3095                         iounmap(card->fbq[i]);
3096         }
3097
3098         if (card->membase)
3099                 iounmap(card->membase);
3100
3101         clear_bit(IDT77252_BIT_INIT, &card->flags);
3102         DIPRINTK("%s: Card deinitialized.\n", card->name);
3103 }
3104
3105
3106 static void init_sram(struct idt77252_dev *card)
3107 {
3108         int i;
3109
3110         for (i = 0; i < card->sramsize; i += 4)
3111                 write_sram(card, (i >> 2), 0);
3112
3113         /* set SRAM layout for THIS card */
3114         if (card->sramsize == (512 * 1024)) {
3115                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3116                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3117                     / SAR_SRAM_TCT_SIZE;
3118                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3119                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3120                     / SAR_SRAM_RCT_SIZE;
3121                 card->rt_base = SAR_SRAM_RT_128_BASE;
3122                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3123                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3124                     / SAR_SRAM_SCD_SIZE;
3125                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3126                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3127                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3128                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3129                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3130                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3131                 card->fifo_size = SAR_RXFD_SIZE_32K;
3132         } else {
3133                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3134                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3135                     / SAR_SRAM_TCT_SIZE;
3136                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3137                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3138                     / SAR_SRAM_RCT_SIZE;
3139                 card->rt_base = SAR_SRAM_RT_32_BASE;
3140                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3141                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3142                     / SAR_SRAM_SCD_SIZE;
3143                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3144                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3145                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3146                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3147                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3148                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3149                 card->fifo_size = SAR_RXFD_SIZE_4K;
3150         }
3151
3152         /* Initialize TCT */
3153         for (i = 0; i < card->tct_size; i++) {
3154                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3155                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3156                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3157                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3158                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3159                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3160                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3161                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3162         }
3163
3164         /* Initialize RCT */
3165         for (i = 0; i < card->rct_size; i++) {
3166                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3167                                     (u32) SAR_RCTE_RAWCELLINTEN);
3168                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3169                                     (u32) 0);
3170                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3171                                     (u32) 0);
3172                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3173                                     (u32) 0xffffffff);
3174         }
3175
3176         writel((SAR_FBQ0_LOW << 28) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3177         writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3178         writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3179         writel((SAR_FBQ3_LOW << 28) | (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3180
3181         /* Initialize rate table  */
3182         for (i = 0; i < 256; i++) {
3183                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3184         }
3185
3186         for (i = 0; i < 128; i++) {
3187                 unsigned int tmp;
3188
3189                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3190                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3191                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3192                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3193                 write_sram(card, card->rt_base + 256 + i, tmp);
3194         }
3195
3196 #if 0 /* Fill RDF and AIR tables. */
3197         for (i = 0; i < 128; i++) {
3198                 unsigned int tmp;
3199
3200                 tmp = RDF[0][(i << 1) + 0] << 16;
3201                 tmp |= RDF[0][(i << 1) + 1] << 0;
3202                 write_sram(card, card->rt_base + 512 + i, tmp);
3203         }
3204
3205         for (i = 0; i < 128; i++) {
3206                 unsigned int tmp;
3207
3208                 tmp = AIR[0][(i << 1) + 0] << 16;
3209                 tmp |= AIR[0][(i << 1) + 1] << 0;
3210                 write_sram(card, card->rt_base + 640 + i, tmp);
3211         }
3212 #endif
3213
3214         IPRINTK("%s: initialize rate table ...\n", card->name);
3215         writel(card->rt_base << 2, SAR_REG_RTBL);
3216
3217         /* Initialize TSTs */
3218         IPRINTK("%s: initialize TST ...\n", card->name);
3219         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3220
3221         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3222                 write_sram(card, i, TSTE_OPC_VAR);
3223         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3224         idt77252_sram_write_errors = 1;
3225         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3226         idt77252_sram_write_errors = 0;
3227         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3228                 write_sram(card, i, TSTE_OPC_VAR);
3229         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3230         idt77252_sram_write_errors = 1;
3231         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3232         idt77252_sram_write_errors = 0;
3233
3234         card->tst_index = 0;
3235         writel(card->tst[0] << 2, SAR_REG_TSTB);
3236
3237         /* Initialize ABRSTD and Receive FIFO */
3238         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3239         writel(card->abrst_size | (card->abrst_base << 2),
3240                SAR_REG_ABRSTD);
3241
3242         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3243         writel(card->fifo_size | (card->fifo_base << 2),
3244                SAR_REG_RXFD);
3245
3246         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3247 }
3248
3249 static int init_card(struct atm_dev *dev)
3250 {
3251         struct idt77252_dev *card = dev->dev_data;
3252         struct pci_dev *pcidev = card->pcidev;
3253         unsigned long tmpl, modl;
3254         unsigned int linkrate, rsvdcr;
3255         unsigned int tst_entries;
3256         struct net_device *tmp;
3257         char tname[10];
3258
3259         u32 size;
3260         u_char pci_byte;
3261         u32 conf;
3262         int i, k;
3263
3264         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3265                 printk("Error: SAR already initialized.\n");
3266                 return -1;
3267         }
3268
3269 /*****************************************************************/
3270 /*   P C I   C O N F I G U R A T I O N                           */
3271 /*****************************************************************/
3272
3273         /* Set PCI Retry-Timeout and TRDY timeout */
3274         IPRINTK("%s: Checking PCI retries.\n", card->name);
3275         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3276                 printk("%s: can't read PCI retry timeout.\n", card->name);
3277                 deinit_card(card);
3278                 return -1;
3279         }
3280         if (pci_byte != 0) {
3281                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3282                         card->name, pci_byte);
3283                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3284                         printk("%s: can't set PCI retry timeout.\n",
3285                                card->name);
3286                         deinit_card(card);
3287                         return -1;
3288                 }
3289         }
3290         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3291         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3292                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3293                 deinit_card(card);
3294                 return -1;
3295         }
3296         if (pci_byte != 0) {
3297                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3298                         card->name, pci_byte);
3299                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3300                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3301                         deinit_card(card);
3302                         return -1;
3303                 }
3304         }
3305         /* Reset Timer register */
3306         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3307                 printk("%s: resetting timer overflow.\n", card->name);
3308                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3309         }
3310         IPRINTK("%s: Request IRQ ... ", card->name);
3311         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3312                         card->name, card) != 0) {
3313                 printk("%s: can't allocate IRQ.\n", card->name);
3314                 deinit_card(card);
3315                 return -1;
3316         }
3317         IPRINTK("got %d.\n", pcidev->irq);
3318
3319 /*****************************************************************/
3320 /*   C H E C K   A N D   I N I T   S R A M                       */
3321 /*****************************************************************/
3322
3323         IPRINTK("%s: Initializing SRAM\n", card->name);
3324
3325         /* preset size of connecton table, so that init_sram() knows about it */
3326         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3327                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3328                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3329 #ifndef ATM_IDT77252_SEND_IDLE
3330                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3331 #endif
3332                 0;
3333
3334         if (card->sramsize == (512 * 1024))
3335                 conf |= SAR_CFG_CNTBL_1k;
3336         else
3337                 conf |= SAR_CFG_CNTBL_512;
3338
3339         switch (vpibits) {
3340         case 0:
3341                 conf |= SAR_CFG_VPVCS_0;
3342                 break;
3343         default:
3344         case 1:
3345                 conf |= SAR_CFG_VPVCS_1;
3346                 break;
3347         case 2:
3348                 conf |= SAR_CFG_VPVCS_2;
3349                 break;
3350         case 8:
3351                 conf |= SAR_CFG_VPVCS_8;
3352                 break;
3353         }
3354
3355         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3356
3357         init_sram(card);
3358
3359 /********************************************************************/
3360 /*  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 */
3361 /********************************************************************/
3362         /* Initialize TSQ */
3363         if (0 != init_tsq(card)) {
3364                 deinit_card(card);
3365                 return -1;
3366         }
3367         /* Initialize RSQ */
3368         if (0 != init_rsq(card)) {
3369                 deinit_card(card);
3370                 return -1;
3371         }
3372
3373         card->vpibits = vpibits;
3374         if (card->sramsize == (512 * 1024)) {
3375                 card->vcibits = 10 - card->vpibits;
3376         } else {
3377                 card->vcibits = 9 - card->vpibits;
3378         }
3379
3380         card->vcimask = 0;
3381         for (k = 0, i = 1; k < card->vcibits; k++) {
3382                 card->vcimask |= i;
3383                 i <<= 1;
3384         }
3385
3386         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3387         writel(0, SAR_REG_VPM);
3388
3389         /* Little Endian Order   */
3390         writel(0, SAR_REG_GP);
3391
3392         /* Initialize RAW Cell Handle Register  */
3393         card->raw_cell_hnd = dma_zalloc_coherent(&card->pcidev->dev,
3394                                                  2 * sizeof(u32),
3395                                                  &card->raw_cell_paddr,
3396                                                  GFP_KERNEL);
3397         if (!card->raw_cell_hnd) {
3398                 printk("%s: memory allocation failure.\n", card->name);
3399                 deinit_card(card);
3400                 return -1;
3401         }
3402         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3403         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3404                 card->raw_cell_hnd);
3405
3406         size = sizeof(struct vc_map *) * card->tct_size;
3407         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3408         card->vcs = vzalloc(size);
3409         if (!card->vcs) {
3410                 printk("%s: memory allocation failure.\n", card->name);
3411                 deinit_card(card);
3412                 return -1;
3413         }
3414
3415         size = sizeof(struct vc_map *) * card->scd_size;
3416         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3417                 card->name, size);
3418         card->scd2vc = vzalloc(size);
3419         if (!card->scd2vc) {
3420                 printk("%s: memory allocation failure.\n", card->name);
3421                 deinit_card(card);
3422                 return -1;
3423         }
3424
3425         size = sizeof(struct tst_info) * (card->tst_size - 2);
3426         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3427                 card->name, size);
3428         card->soft_tst = vmalloc(size);
3429         if (!card->soft_tst) {
3430                 printk("%s: memory allocation failure.\n", card->name);
3431                 deinit_card(card);
3432                 return -1;
3433         }
3434         for (i = 0; i < card->tst_size - 2; i++) {
3435                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3436                 card->soft_tst[i].vc = NULL;
3437         }
3438
3439         if (dev->phy == NULL) {
3440                 printk("%s: No LT device defined.\n", card->name);
3441                 deinit_card(card);
3442                 return -1;
3443         }
3444         if (dev->phy->ioctl == NULL) {
3445                 printk("%s: LT had no IOCTL function defined.\n", card->name);
3446                 deinit_card(card);
3447                 return -1;
3448         }
3449
3450 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3451         /*
3452          * this is a jhs hack to get around special functionality in the
3453          * phy driver for the atecom hardware; the functionality doesn't
3454          * exist in the linux atm suni driver
3455          *
3456          * it isn't the right way to do things, but as the guy from NIST
3457          * said, talking about their measurement of the fine structure
3458          * constant, "it's good enough for government work."
3459          */
3460         linkrate = 149760000;
3461 #endif
3462
3463         card->link_pcr = (linkrate / 8 / 53);
3464         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3465                card->name, linkrate, card->link_pcr);
3466
3467 #ifdef ATM_IDT77252_SEND_IDLE
3468         card->utopia_pcr = card->link_pcr;
3469 #else
3470         card->utopia_pcr = (160000000 / 8 / 54);
3471 #endif
3472
3473         rsvdcr = 0;
3474         if (card->utopia_pcr > card->link_pcr)
3475                 rsvdcr = card->utopia_pcr - card->link_pcr;
3476
3477         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3478         modl = tmpl % (unsigned long)card->utopia_pcr;
3479         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3480         if (modl)
3481                 tst_entries++;
3482         card->tst_free -= tst_entries;
3483         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3484
3485 #ifdef HAVE_EEPROM
3486         idt77252_eeprom_init(card);
3487         printk("%s: EEPROM: %02x:", card->name,
3488                 idt77252_eeprom_read_status(card));
3489
3490         for (i = 0; i < 0x80; i++) {
3491                 printk(" %02x",
3492                 idt77252_eeprom_read_byte(card, i)
3493                 );
3494         }
3495         printk("\n");
3496 #endif /* HAVE_EEPROM */
3497
3498         /*
3499          * XXX: <hack>
3500          */
3501         sprintf(tname, "eth%d", card->index);
3502         tmp = dev_get_by_name(&init_net, tname);        /* jhs: was "tmp = dev_get(tname);" */
3503         if (tmp) {
3504                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3505                 dev_put(tmp);
3506                 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3507         }
3508         /*
3509          * XXX: </hack>
3510          */
3511
3512         /* Set Maximum Deficit Count for now. */
3513         writel(0xffff, SAR_REG_MDFCT);
3514
3515         set_bit(IDT77252_BIT_INIT, &card->flags);
3516
3517         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3518         return 0;
3519 }
3520
3521
3522 /*****************************************************************************/
3523 /*                                                                           */
3524 /* Probing of IDT77252 ABR SAR                                               */
3525 /*                                                                           */
3526 /*****************************************************************************/
3527
3528
3529 static int idt77252_preset(struct idt77252_dev *card)
3530 {
3531         u16 pci_command;
3532
3533 /*****************************************************************/
3534 /*   P C I   C O N F I G U R A T I O N                           */
3535 /*****************************************************************/
3536
3537         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3538                 card->name);
3539         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3540                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3541                 deinit_card(card);
3542                 return -1;
3543         }
3544         if (!(pci_command & PCI_COMMAND_IO)) {
3545                 printk("%s: PCI_COMMAND: %04x (???)\n",
3546                        card->name, pci_command);
3547                 deinit_card(card);
3548                 return (-1);
3549         }
3550         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3551         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3552                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3553                 deinit_card(card);
3554                 return -1;
3555         }
3556 /*****************************************************************/
3557 /*   G E N E R I C   R E S E T                                   */
3558 /*****************************************************************/
3559
3560         /* Software reset */
3561         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3562         mdelay(1);
3563         writel(0, SAR_REG_CFG);
3564
3565         IPRINTK("%s: Software resetted.\n", card->name);
3566         return 0;
3567 }
3568
3569
3570 static unsigned long probe_sram(struct idt77252_dev *card)
3571 {
3572         u32 data, addr;
3573
3574         writel(0, SAR_REG_DR0);
3575         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3576
3577         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3578                 writel(ATM_POISON, SAR_REG_DR0);
3579                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3580
3581                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3582                 data = readl(SAR_REG_DR0);
3583
3584                 if (data != 0)
3585                         break;
3586         }
3587
3588         return addr * sizeof(u32);
3589 }
3590
3591 static int idt77252_init_one(struct pci_dev *pcidev,
3592                              const struct pci_device_id *id)
3593 {
3594         static struct idt77252_dev **last = &idt77252_chain;
3595         static int index = 0;
3596
3597         unsigned long membase, srambase;
3598         struct idt77252_dev *card;
3599         struct atm_dev *dev;
3600         int i, err;
3601
3602
3603         if ((err = pci_enable_device(pcidev))) {
3604                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3605                 return err;
3606         }
3607
3608         if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
3609                 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
3610                 return err;
3611         }
3612
3613         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3614         if (!card) {
3615                 printk("idt77252-%d: can't allocate private data\n", index);
3616                 err = -ENOMEM;
3617                 goto err_out_disable_pdev;
3618         }
3619         card->revision = pcidev->revision;
3620         card->index = index;
3621         card->pcidev = pcidev;
3622         sprintf(card->name, "idt77252-%d", card->index);
3623
3624         INIT_WORK(&card->tqueue, idt77252_softint);
3625
3626         membase = pci_resource_start(pcidev, 1);
3627         srambase = pci_resource_start(pcidev, 2);
3628
3629         mutex_init(&card->mutex);
3630         spin_lock_init(&card->cmd_lock);
3631         spin_lock_init(&card->tst_lock);
3632
3633         timer_setup(&card->tst_timer, tst_timer, 0);
3634
3635         /* Do the I/O remapping... */
3636         card->membase = ioremap(membase, 1024);
3637         if (!card->membase) {
3638                 printk("%s: can't ioremap() membase\n", card->name);
3639                 err = -EIO;
3640                 goto err_out_free_card;
3641         }
3642
3643         if (idt77252_preset(card)) {
3644                 printk("%s: preset failed\n", card->name);
3645                 err = -EIO;
3646                 goto err_out_iounmap;
3647         }
3648
3649         dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3650                                NULL);
3651         if (!dev) {
3652                 printk("%s: can't register atm device\n", card->name);
3653                 err = -EIO;
3654                 goto err_out_iounmap;
3655         }
3656         dev->dev_data = card;
3657         card->atmdev = dev;
3658
3659 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3660         suni_init(dev);
3661         if (!dev->phy) {
3662                 printk("%s: can't init SUNI\n", card->name);
3663                 err = -EIO;
3664                 goto err_out_deinit_card;
3665         }
3666 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3667
3668         card->sramsize = probe_sram(card);
3669
3670         for (i = 0; i < 4; i++) {
3671                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3672                 if (!card->fbq[i]) {
3673                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3674                         err = -EIO;
3675                         goto err_out_deinit_card;
3676                 }
3677         }
3678
3679         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3680                card->name, ((card->revision > 1) && (card->revision < 25)) ?
3681                'A' + card->revision - 1 : '?', membase, srambase,
3682                card->sramsize / 1024);
3683
3684         if (init_card(dev)) {
3685                 printk("%s: init_card failed\n", card->name);
3686                 err = -EIO;
3687                 goto err_out_deinit_card;
3688         }
3689
3690         dev->ci_range.vpi_bits = card->vpibits;
3691         dev->ci_range.vci_bits = card->vcibits;
3692         dev->link_rate = card->link_pcr;
3693
3694         if (dev->phy->start)
3695                 dev->phy->start(dev);
3696
3697         if (idt77252_dev_open(card)) {
3698                 printk("%s: dev_open failed\n", card->name);
3699                 err = -EIO;
3700                 goto err_out_stop;
3701         }
3702
3703         *last = card;
3704         last = &card->next;
3705         index++;
3706
3707         return 0;
3708
3709 err_out_stop:
3710         if (dev->phy->stop)
3711                 dev->phy->stop(dev);
3712
3713 err_out_deinit_card:
3714         deinit_card(card);
3715
3716 err_out_iounmap:
3717         iounmap(card->membase);
3718
3719 err_out_free_card:
3720         kfree(card);
3721
3722 err_out_disable_pdev:
3723         pci_disable_device(pcidev);
3724         return err;
3725 }
3726
3727 static const struct pci_device_id idt77252_pci_tbl[] =
3728 {
3729         { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3730         { 0, }
3731 };
3732
3733 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3734
3735 static struct pci_driver idt77252_driver = {
3736         .name           = "idt77252",
3737         .id_table       = idt77252_pci_tbl,
3738         .probe          = idt77252_init_one,
3739 };
3740
3741 static int __init idt77252_init(void)
3742 {
3743         struct sk_buff *skb;
3744
3745         printk("%s: at %p\n", __func__, idt77252_init);
3746
3747         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3748                               sizeof(struct idt77252_skb_prv)) {
3749                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3750                        __func__, (unsigned long) sizeof(skb->cb),
3751                        (unsigned long) sizeof(struct atm_skb_data) +
3752                                        sizeof(struct idt77252_skb_prv));
3753                 return -EIO;
3754         }
3755
3756         return pci_register_driver(&idt77252_driver);
3757 }
3758
3759 static void __exit idt77252_exit(void)
3760 {
3761         struct idt77252_dev *card;
3762         struct atm_dev *dev;
3763
3764         pci_unregister_driver(&idt77252_driver);
3765
3766         while (idt77252_chain) {
3767                 card = idt77252_chain;
3768                 dev = card->atmdev;
3769                 idt77252_chain = card->next;
3770
3771                 if (dev->phy->stop)
3772                         dev->phy->stop(dev);
3773                 deinit_card(card);
3774                 pci_disable_device(card->pcidev);
3775                 kfree(card);
3776         }
3777
3778         DIPRINTK("idt77252: finished cleanup-module().\n");
3779 }
3780
3781 module_init(idt77252_init);
3782 module_exit(idt77252_exit);
3783
3784 MODULE_LICENSE("GPL");
3785
3786 module_param(vpibits, uint, 0);
3787 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3788 #ifdef CONFIG_ATM_IDT77252_DEBUG
3789 module_param(debug, ulong, 0644);
3790 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3791 #endif
3792
3793 MODULE_AUTHOR("Eddie C. Dost <[email protected]>");
3794 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");