drivers/atm/he.c

   1 /*
   2
   3   he.c
   4
   5   ForeRunnerHE ATM Adapter driver for ATM on Linux
   6   Copyright (C) 1999-2001  Naval Research Laboratory
   7
   8   This library is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU Lesser General Public
  10   License as published by the Free Software Foundation; either
  11   version 2.1 of the License, or (at your option) any later version.
  12
  13   This library is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public
  19   License along with this library; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21
  22 */
  23
  24 /*
  25
  26   he.c
  27
  28   ForeRunnerHE ATM Adapter driver for ATM on Linux
  29   Copyright (C) 1999-2001  Naval Research Laboratory
  30
  31   Permission to use, copy, modify and distribute this software and its
  32   documentation is hereby granted, provided that both the copyright
  33   notice and this permission notice appear in all copies of the software,
  34   derivative works or modified versions, and any portions thereof, and
  35   that both notices appear in supporting documentation.
  36
  37   NRL ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION AND
  38   DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
  39   RESULTING FROM THE USE OF THIS SOFTWARE.
  40
  41   This driver was written using the "Programmer's Reference Manual for
  42   ForeRunnerHE(tm)", MANU0361-01 - Rev. A, 08/21/98.
  43
  44   AUTHORS:
  45         chas williams <chas@cmf.nrl.navy.mil>
  46         eric kinzie <ekinzie@cmf.nrl.navy.mil>
  47
  48   NOTES:
  49         4096 supported 'connections'
  50         group 0 is used for all traffic
  51         interrupt queue 0 is used for all interrupts
  52         aal0 support (based on work from ulrich.u.muller@nokia.com)
  53
  54  */
  55
  56 #include <linux/module.h>
  57 #include <linux/kernel.h>
  58 #include <linux/skbuff.h>
  59 #include <linux/pci.h>
  60 #include <linux/errno.h>
  61 #include <linux/types.h>
  62 #include <linux/string.h>
  63 #include <linux/delay.h>
  64 #include <linux/init.h>
  65 #include <linux/mm.h>
  66 #include <linux/sched.h>
  67 #include <linux/timer.h>
  68 #include <linux/interrupt.h>
  69 #include <linux/dma-mapping.h>
  70 #include <asm/io.h>
  71 #include <asm/byteorder.h>
  72 #include <asm/uaccess.h>
  73
  74 #include <linux/atmdev.h>
  75 #include <linux/atm.h>
  76 #include <linux/sonet.h>
  77
  78 #define USE_TASKLET
  79 #undef USE_SCATTERGATHER
  80 #undef USE_CHECKSUM_HW                  /* still confused about this */
  81 #define USE_RBPS
  82 #undef USE_RBPS_POOL                    /* if memory is tight try this */
  83 #undef USE_RBPL_POOL                    /* if memory is tight try this */
  84 #define USE_TPD_POOL
  85 /* #undef CONFIG_ATM_HE_USE_SUNI */
  86 /* #undef HE_DEBUG */
  87
  88 #include "he.h"
  89 #include "suni.h"
  90 #include <linux/atm_he.h>
  91
  92 #define hprintk(fmt,args...)    printk(KERN_ERR DEV_LABEL "%d: " fmt, he_dev->number , ##args)
  93
  94 #ifdef HE_DEBUG
  95 #define HPRINTK(fmt,args...)    printk(KERN_DEBUG DEV_LABEL "%d: " fmt, he_dev->number , ##args)
  96 #else /* !HE_DEBUG */
  97 #define HPRINTK(fmt,args...)    do { } while (0)
  98 #endif /* HE_DEBUG */
  99
 100 /* declarations */
 101
 102 static int he_open(struct atm_vcc *vcc);
 103 static void he_close(struct atm_vcc *vcc);
 104 static int he_send(struct atm_vcc *vcc, struct sk_buff *skb);
 105 static int he_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
 106 static irqreturn_t he_irq_handler(int irq, void *dev_id);
 107 static void he_tasklet(unsigned long data);
 108 static int he_proc_read(struct atm_dev *dev,loff_t *pos,char *page);
 109 static int he_start(struct atm_dev *dev);
 110 static void he_stop(struct he_dev *dev);
 111 static void he_phy_put(struct atm_dev *, unsigned char, unsigned long);
 112 static unsigned char he_phy_get(struct atm_dev *, unsigned long);
 113
 114 static u8 read_prom_byte(struct he_dev *he_dev, int addr);
 115
 116 /* globals */
 117
 118 static struct he_dev *he_devs;
 119 static int disable64;
 120 static short nvpibits = -1;
 121 static short nvcibits = -1;
 122 static short rx_skb_reserve = 16;
 123 static int irq_coalesce = 1;
 124 static int sdh = 0;
 125
 126 /* Read from EEPROM = 0000 0011b */
 127 static unsigned int readtab[] = {
 128         CS_HIGH | CLK_HIGH,
 129         CS_LOW | CLK_LOW,
 130         CLK_HIGH,               /* 0 */
 131         CLK_LOW,
 132         CLK_HIGH,               /* 0 */
 133         CLK_LOW,
 134         CLK_HIGH,               /* 0 */
 135         CLK_LOW,
 136         CLK_HIGH,               /* 0 */
 137         CLK_LOW,
 138         CLK_HIGH,               /* 0 */
 139         CLK_LOW,
 140         CLK_HIGH,               /* 0 */
 141         CLK_LOW | SI_HIGH,
 142         CLK_HIGH | SI_HIGH,     /* 1 */
 143         CLK_LOW | SI_HIGH,
 144         CLK_HIGH | SI_HIGH      /* 1 */
 145 };
 146
 147 /* Clock to read from/write to the EEPROM */
 148 static unsigned int clocktab[] = {
 149         CLK_LOW,
 150         CLK_HIGH,
 151         CLK_LOW,
 152         CLK_HIGH,
 153         CLK_LOW,
 154         CLK_HIGH,
 155         CLK_LOW,
 156         CLK_HIGH,
 157         CLK_LOW,
 158         CLK_HIGH,
 159         CLK_LOW,
 160         CLK_HIGH,
 161         CLK_LOW,
 162         CLK_HIGH,
 163         CLK_LOW,
 164         CLK_HIGH,
 165         CLK_LOW
 166 };
 167
 168 static struct atmdev_ops he_ops =
 169 {
 170         .open =         he_open,
 171         .close =        he_close,
 172         .ioctl =        he_ioctl,
 173         .send =         he_send,
 174         .phy_put =      he_phy_put,
 175         .phy_get =      he_phy_get,
 176         .proc_read =    he_proc_read,
 177         .owner =        THIS_MODULE
 178 };
 179
 180 #define he_writel(dev, val, reg)        do { writel(val, (dev)->membase + (reg)); wmb(); } while (0)
 181 #define he_readl(dev, reg)              readl((dev)->membase + (reg))
 182
 183 /* section 2.12 connection memory access */
 184
 185 static __inline__ void
 186 he_writel_internal(struct he_dev *he_dev, unsigned val, unsigned addr,
 187                                                                 unsigned flags)
 188 {
 189         he_writel(he_dev, val, CON_DAT);
 190         (void) he_readl(he_dev, CON_DAT);               /* flush posted writes */
 191         he_writel(he_dev, flags | CON_CTL_WRITE | CON_CTL_ADDR(addr), CON_CTL);
 192         while (he_readl(he_dev, CON_CTL) & CON_CTL_BUSY);
 193 }
 194
 195 #define he_writel_rcm(dev, val, reg)                            \
 196                         he_writel_internal(dev, val, reg, CON_CTL_RCM)
 197
 198 #define he_writel_tcm(dev, val, reg)                            \
 199                         he_writel_internal(dev, val, reg, CON_CTL_TCM)
 200
 201 #define he_writel_mbox(dev, val, reg)                           \
 202                         he_writel_internal(dev, val, reg, CON_CTL_MBOX)
 203
 204 static unsigned
 205 he_readl_internal(struct he_dev *he_dev, unsigned addr, unsigned flags)
 206 {
 207         he_writel(he_dev, flags | CON_CTL_READ | CON_CTL_ADDR(addr), CON_CTL);
 208         while (he_readl(he_dev, CON_CTL) & CON_CTL_BUSY);
 209         return he_readl(he_dev, CON_DAT);
 210 }
 211
 212 #define he_readl_rcm(dev, reg) \
 213                         he_readl_internal(dev, reg, CON_CTL_RCM)
 214
 215 #define he_readl_tcm(dev, reg) \
 216                         he_readl_internal(dev, reg, CON_CTL_TCM)
 217
 218 #define he_readl_mbox(dev, reg) \
 219                         he_readl_internal(dev, reg, CON_CTL_MBOX)
 220
 221
 222 /* figure 2.2 connection id */
 223
 224 #define he_mkcid(dev, vpi, vci)         (((vpi << (dev)->vcibits) | vci) & 0x1fff)
 225
 226 /* 2.5.1 per connection transmit state registers */
 227
 228 #define he_writel_tsr0(dev, val, cid) \
 229                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 0)
 230 #define he_readl_tsr0(dev, cid) \
 231                 he_readl_tcm(dev, CONFIG_TSRA | (cid << 3) | 0)
 232
 233 #define he_writel_tsr1(dev, val, cid) \
 234                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 1)
 235
 236 #define he_writel_tsr2(dev, val, cid) \
 237                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 2)
 238
 239 #define he_writel_tsr3(dev, val, cid) \
 240                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 3)
 241
 242 #define he_writel_tsr4(dev, val, cid) \
 243                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 4)
 244
 245         /* from page 2-20
 246          *
 247          * NOTE While the transmit connection is active, bits 23 through 0
 248          *      of this register must not be written by the host.  Byte
 249          *      enables should be used during normal operation when writing
 250          *      the most significant byte.
 251          */
 252
 253 #define he_writel_tsr4_upper(dev, val, cid) \
 254                 he_writel_internal(dev, val, CONFIG_TSRA | (cid << 3) | 4, \
 255                                                         CON_CTL_TCM \
 256                                                         | CON_BYTE_DISABLE_2 \
 257                                                         | CON_BYTE_DISABLE_1 \
 258                                                         | CON_BYTE_DISABLE_0)
 259
 260 #define he_readl_tsr4(dev, cid) \
 261                 he_readl_tcm(dev, CONFIG_TSRA | (cid << 3) | 4)
 262
 263 #define he_writel_tsr5(dev, val, cid) \
 264                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 5)
 265
 266 #define he_writel_tsr6(dev, val, cid) \
 267                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 6)
 268
 269 #define he_writel_tsr7(dev, val, cid) \
 270                 he_writel_tcm(dev, val, CONFIG_TSRA | (cid << 3) | 7)
 271
 272
 273 #define he_writel_tsr8(dev, val, cid) \
 274                 he_writel_tcm(dev, val, CONFIG_TSRB | (cid << 2) | 0)
 275
 276 #define he_writel_tsr9(dev, val, cid) \
 277                 he_writel_tcm(dev, val, CONFIG_TSRB | (cid << 2) | 1)
 278
 279 #define he_writel_tsr10(dev, val, cid) \
 280                 he_writel_tcm(dev, val, CONFIG_TSRB | (cid << 2) | 2)
 281
 282 #define he_writel_tsr11(dev, val, cid) \
 283                 he_writel_tcm(dev, val, CONFIG_TSRB | (cid << 2) | 3)
 284
 285
 286 #define he_writel_tsr12(dev, val, cid) \
 287                 he_writel_tcm(dev, val, CONFIG_TSRC | (cid << 1) | 0)
 288
 289 #define he_writel_tsr13(dev, val, cid) \
 290                 he_writel_tcm(dev, val, CONFIG_TSRC | (cid << 1) | 1)
 291
 292
 293 #define he_writel_tsr14(dev, val, cid) \
 294                 he_writel_tcm(dev, val, CONFIG_TSRD | cid)
 295
 296 #define he_writel_tsr14_upper(dev, val, cid) \
 297                 he_writel_internal(dev, val, CONFIG_TSRD | cid, \
 298                                                         CON_CTL_TCM \
 299                                                         | CON_BYTE_DISABLE_2 \
 300                                                         | CON_BYTE_DISABLE_1 \
 301                                                         | CON_BYTE_DISABLE_0)
 302
 303 /* 2.7.1 per connection receive state registers */
 304
 305 #define he_writel_rsr0(dev, val, cid) \
 306                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 0)
 307 #define he_readl_rsr0(dev, cid) \
 308                 he_readl_rcm(dev, 0x00000 | (cid << 3) | 0)
 309
 310 #define he_writel_rsr1(dev, val, cid) \
 311                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 1)
 312
 313 #define he_writel_rsr2(dev, val, cid) \
 314                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 2)
 315
 316 #define he_writel_rsr3(dev, val, cid) \
 317                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 3)
 318
 319 #define he_writel_rsr4(dev, val, cid) \
 320                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 4)
 321
 322 #define he_writel_rsr5(dev, val, cid) \
 323                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 5)
 324
 325 #define he_writel_rsr6(dev, val, cid) \
 326                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 6)
 327
 328 #define he_writel_rsr7(dev, val, cid) \
 329                 he_writel_rcm(dev, val, 0x00000 | (cid << 3) | 7)
 330
 331 static __inline__ struct atm_vcc*
 332 __find_vcc(struct he_dev *he_dev, unsigned cid)
 333 {
 334         struct hlist_head *head;
 335         struct atm_vcc *vcc;
 336         struct hlist_node *node;
 337         struct sock *s;
 338         short vpi;
 339         int vci;
 340
 341         vpi = cid >> he_dev->vcibits;
 342         vci = cid & ((1 << he_dev->vcibits) - 1);
 343         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 344
 345         sk_for_each(s, node, head) {
 346                 vcc = atm_sk(s);
 347                 if (vcc->dev == he_dev->atm_dev &&
 348                     vcc->vci == vci && vcc->vpi == vpi &&
 349                     vcc->qos.rxtp.traffic_class != ATM_NONE) {
 350                                 return vcc;
 351                 }
 352         }
 353         return NULL;
 354 }
 355
 356 static int __devinit
 357 he_init_one(struct pci_dev *pci_dev, const struct pci_device_id *pci_ent)
 358 {
 359         struct atm_dev *atm_dev = NULL;
 360         struct he_dev *he_dev = NULL;
 361         int err = 0;
 362
 363         printk(KERN_INFO "ATM he driver\n");
 364
 365         if (pci_enable_device(pci_dev))
 366                 return -EIO;
 367         if (pci_set_dma_mask(pci_dev, DMA_32BIT_MASK) != 0) {
 368                 printk(KERN_WARNING "he: no suitable dma available\n");
 369                 err = -EIO;
 370                 goto init_one_failure;
 371         }
 372
 373         atm_dev = atm_dev_register(DEV_LABEL, &he_ops, -1, NULL);
 374         if (!atm_dev) {
 375                 err = -ENODEV;
 376                 goto init_one_failure;
 377         }
 378         pci_set_drvdata(pci_dev, atm_dev);
 379
 380         he_dev = kzalloc(sizeof(struct he_dev),
 381                                                         GFP_KERNEL);
 382         if (!he_dev) {
 383                 err = -ENOMEM;
 384                 goto init_one_failure;
 385         }
 386         he_dev->pci_dev = pci_dev;
 387         he_dev->atm_dev = atm_dev;
 388         he_dev->atm_dev->dev_data = he_dev;
 389         atm_dev->dev_data = he_dev;
 390         he_dev->number = atm_dev->number;
 391 #ifdef USE_TASKLET
 392         tasklet_init(&he_dev->tasklet, he_tasklet, (unsigned long) he_dev);
 393 #endif
 394         spin_lock_init(&he_dev->global_lock);
 395
 396         if (he_start(atm_dev)) {
 397                 he_stop(he_dev);
 398                 err = -ENODEV;
 399                 goto init_one_failure;
 400         }
 401         he_dev->next = NULL;
 402         if (he_devs)
 403                 he_dev->next = he_devs;
 404         he_devs = he_dev;
 405         return 0;
 406
 407 init_one_failure:
 408         if (atm_dev)
 409                 atm_dev_deregister(atm_dev);
 410         kfree(he_dev);
 411         pci_disable_device(pci_dev);
 412         return err;
 413 }
 414
 415 static void __devexit
 416 he_remove_one (struct pci_dev *pci_dev)
 417 {
 418         struct atm_dev *atm_dev;
 419         struct he_dev *he_dev;
 420
 421         atm_dev = pci_get_drvdata(pci_dev);
 422         he_dev = HE_DEV(atm_dev);
 423
 424         /* need to remove from he_devs */
 425
 426         he_stop(he_dev);
 427         atm_dev_deregister(atm_dev);
 428         kfree(he_dev);
 429
 430         pci_set_drvdata(pci_dev, NULL);
 431         pci_disable_device(pci_dev);
 432 }
 433
 434
 435 static unsigned
 436 rate_to_atmf(unsigned rate)             /* cps to atm forum format */
 437 {
 438 #define NONZERO (1 << 14)
 439
 440         unsigned exp = 0;
 441
 442         if (rate == 0)
 443                 return 0;
 444
 445         rate <<= 9;
 446         while (rate > 0x3ff) {
 447                 ++exp;
 448                 rate >>= 1;
 449         }
 450
 451         return (NONZERO | (exp << 9) | (rate & 0x1ff));
 452 }
 453
 454 static void __devinit
 455 he_init_rx_lbfp0(struct he_dev *he_dev)
 456 {
 457         unsigned i, lbm_offset, lbufd_index, lbuf_addr, lbuf_count;
 458         unsigned lbufs_per_row = he_dev->cells_per_row / he_dev->cells_per_lbuf;
 459         unsigned lbuf_bufsize = he_dev->cells_per_lbuf * ATM_CELL_PAYLOAD;
 460         unsigned row_offset = he_dev->r0_startrow * he_dev->bytes_per_row;
 461
 462         lbufd_index = 0;
 463         lbm_offset = he_readl(he_dev, RCMLBM_BA);
 464
 465         he_writel(he_dev, lbufd_index, RLBF0_H);
 466
 467         for (i = 0, lbuf_count = 0; i < he_dev->r0_numbuffs; ++i) {
 468                 lbufd_index += 2;
 469                 lbuf_addr = (row_offset + (lbuf_count * lbuf_bufsize)) / 32;
 470
 471                 he_writel_rcm(he_dev, lbuf_addr, lbm_offset);
 472                 he_writel_rcm(he_dev, lbufd_index, lbm_offset + 1);
 473
 474                 if (++lbuf_count == lbufs_per_row) {
 475                         lbuf_count = 0;
 476                         row_offset += he_dev->bytes_per_row;
 477                 }
 478                 lbm_offset += 4;
 479         }
 480
 481         he_writel(he_dev, lbufd_index - 2, RLBF0_T);
 482         he_writel(he_dev, he_dev->r0_numbuffs, RLBF0_C);
 483 }
 484
 485 static void __devinit
 486 he_init_rx_lbfp1(struct he_dev *he_dev)
 487 {
 488         unsigned i, lbm_offset, lbufd_index, lbuf_addr, lbuf_count;
 489         unsigned lbufs_per_row = he_dev->cells_per_row / he_dev->cells_per_lbuf;
 490         unsigned lbuf_bufsize = he_dev->cells_per_lbuf * ATM_CELL_PAYLOAD;
 491         unsigned row_offset = he_dev->r1_startrow * he_dev->bytes_per_row;
 492
 493         lbufd_index = 1;
 494         lbm_offset = he_readl(he_dev, RCMLBM_BA) + (2 * lbufd_index);
 495
 496         he_writel(he_dev, lbufd_index, RLBF1_H);
 497
 498         for (i = 0, lbuf_count = 0; i < he_dev->r1_numbuffs; ++i) {
 499                 lbufd_index += 2;
 500                 lbuf_addr = (row_offset + (lbuf_count * lbuf_bufsize)) / 32;
 501
 502                 he_writel_rcm(he_dev, lbuf_addr, lbm_offset);
 503                 he_writel_rcm(he_dev, lbufd_index, lbm_offset + 1);
 504
 505                 if (++lbuf_count == lbufs_per_row) {
 506                         lbuf_count = 0;
 507                         row_offset += he_dev->bytes_per_row;
 508                 }
 509                 lbm_offset += 4;
 510         }
 511
 512         he_writel(he_dev, lbufd_index - 2, RLBF1_T);
 513         he_writel(he_dev, he_dev->r1_numbuffs, RLBF1_C);
 514 }
 515
 516 static void __devinit
 517 he_init_tx_lbfp(struct he_dev *he_dev)
 518 {
 519         unsigned i, lbm_offset, lbufd_index, lbuf_addr, lbuf_count;
 520         unsigned lbufs_per_row = he_dev->cells_per_row / he_dev->cells_per_lbuf;
 521         unsigned lbuf_bufsize = he_dev->cells_per_lbuf * ATM_CELL_PAYLOAD;
 522         unsigned row_offset = he_dev->tx_startrow * he_dev->bytes_per_row;
 523
 524         lbufd_index = he_dev->r0_numbuffs + he_dev->r1_numbuffs;
 525         lbm_offset = he_readl(he_dev, RCMLBM_BA) + (2 * lbufd_index);
 526
 527         he_writel(he_dev, lbufd_index, TLBF_H);
 528
 529         for (i = 0, lbuf_count = 0; i < he_dev->tx_numbuffs; ++i) {
 530                 lbufd_index += 1;
 531                 lbuf_addr = (row_offset + (lbuf_count * lbuf_bufsize)) / 32;
 532
 533                 he_writel_rcm(he_dev, lbuf_addr, lbm_offset);
 534                 he_writel_rcm(he_dev, lbufd_index, lbm_offset + 1);
 535
 536                 if (++lbuf_count == lbufs_per_row) {
 537                         lbuf_count = 0;
 538                         row_offset += he_dev->bytes_per_row;
 539                 }
 540                 lbm_offset += 2;
 541         }
 542
 543         he_writel(he_dev, lbufd_index - 1, TLBF_T);
 544 }
 545
 546 static int __devinit
 547 he_init_tpdrq(struct he_dev *he_dev)
 548 {
 549         he_dev->tpdrq_base = pci_alloc_consistent(he_dev->pci_dev,
 550                 CONFIG_TPDRQ_SIZE * sizeof(struct he_tpdrq), &he_dev->tpdrq_phys);
 551         if (he_dev->tpdrq_base == NULL) {
 552                 hprintk("failed to alloc tpdrq\n");
 553                 return -ENOMEM;
 554         }
 555         memset(he_dev->tpdrq_base, 0,
 556                                 CONFIG_TPDRQ_SIZE * sizeof(struct he_tpdrq));
 557
 558         he_dev->tpdrq_tail = he_dev->tpdrq_base;
 559         he_dev->tpdrq_head = he_dev->tpdrq_base;
 560
 561         he_writel(he_dev, he_dev->tpdrq_phys, TPDRQ_B_H);
 562         he_writel(he_dev, 0, TPDRQ_T);
 563         he_writel(he_dev, CONFIG_TPDRQ_SIZE - 1, TPDRQ_S);
 564
 565         return 0;
 566 }
 567
 568 static void __devinit
 569 he_init_cs_block(struct he_dev *he_dev)
 570 {
 571         unsigned clock, rate, delta;
 572         int reg;
 573
 574         /* 5.1.7 cs block initialization */
 575
 576         for (reg = 0; reg < 0x20; ++reg)
 577                 he_writel_mbox(he_dev, 0x0, CS_STTIM0 + reg);
 578
 579         /* rate grid timer reload values */
 580
 581         clock = he_is622(he_dev) ? 66667000 : 50000000;
 582         rate = he_dev->atm_dev->link_rate;
 583         delta = rate / 16 / 2;
 584
 585         for (reg = 0; reg < 0x10; ++reg) {
 586                 /* 2.4 internal transmit function
 587                  *
 588                  * we initialize the first row in the rate grid.
 589                  * values are period (in clock cycles) of timer
 590                  */
 591                 unsigned period = clock / rate;
 592
 593                 he_writel_mbox(he_dev, period, CS_TGRLD0 + reg);
 594                 rate -= delta;
 595         }
 596
 597         if (he_is622(he_dev)) {
 598                 /* table 5.2 (4 cells per lbuf) */
 599                 he_writel_mbox(he_dev, 0x000800fa, CS_ERTHR0);
 600                 he_writel_mbox(he_dev, 0x000c33cb, CS_ERTHR1);
 601                 he_writel_mbox(he_dev, 0x0010101b, CS_ERTHR2);
 602                 he_writel_mbox(he_dev, 0x00181dac, CS_ERTHR3);
 603                 he_writel_mbox(he_dev, 0x00280600, CS_ERTHR4);
 604
 605                 /* table 5.3, 5.4, 5.5, 5.6, 5.7 */
 606                 he_writel_mbox(he_dev, 0x023de8b3, CS_ERCTL0);
 607                 he_writel_mbox(he_dev, 0x1801, CS_ERCTL1);
 608                 he_writel_mbox(he_dev, 0x68b3, CS_ERCTL2);
 609                 he_writel_mbox(he_dev, 0x1280, CS_ERSTAT0);
 610                 he_writel_mbox(he_dev, 0x68b3, CS_ERSTAT1);
 611                 he_writel_mbox(he_dev, 0x14585, CS_RTFWR);
 612
 613                 he_writel_mbox(he_dev, 0x4680, CS_RTATR);
 614
 615                 /* table 5.8 */
 616                 he_writel_mbox(he_dev, 0x00159ece, CS_TFBSET);
 617                 he_writel_mbox(he_dev, 0x68b3, CS_WCRMAX);
 618                 he_writel_mbox(he_dev, 0x5eb3, CS_WCRMIN);
 619                 he_writel_mbox(he_dev, 0xe8b3, CS_WCRINC);
 620                 he_writel_mbox(he_dev, 0xdeb3, CS_WCRDEC);
 621                 he_writel_mbox(he_dev, 0x68b3, CS_WCRCEIL);
 622
 623                 /* table 5.9 */
 624                 he_writel_mbox(he_dev, 0x5, CS_OTPPER);
 625                 he_writel_mbox(he_dev, 0x14, CS_OTWPER);
 626         } else {
 627                 /* table 5.1 (4 cells per lbuf) */
 628                 he_writel_mbox(he_dev, 0x000400ea, CS_ERTHR0);
 629                 he_writel_mbox(he_dev, 0x00063388, CS_ERTHR1);
 630                 he_writel_mbox(he_dev, 0x00081018, CS_ERTHR2);
 631                 he_writel_mbox(he_dev, 0x000c1dac, CS_ERTHR3);
 632                 he_writel_mbox(he_dev, 0x0014051a, CS_ERTHR4);
 633
 634                 /* table 5.3, 5.4, 5.5, 5.6, 5.7 */
 635                 he_writel_mbox(he_dev, 0x0235e4b1, CS_ERCTL0);
 636                 he_writel_mbox(he_dev, 0x4701, CS_ERCTL1);
 637                 he_writel_mbox(he_dev, 0x64b1, CS_ERCTL2);
 638                 he_writel_mbox(he_dev, 0x1280, CS_ERSTAT0);
 639                 he_writel_mbox(he_dev, 0x64b1, CS_ERSTAT1);
 640                 he_writel_mbox(he_dev, 0xf424, CS_RTFWR);
 641
 642                 he_writel_mbox(he_dev, 0x4680, CS_RTATR);
 643
 644                 /* table 5.8 */
 645                 he_writel_mbox(he_dev, 0x000563b7, CS_TFBSET);
 646                 he_writel_mbox(he_dev, 0x64b1, CS_WCRMAX);
 647                 he_writel_mbox(he_dev, 0x5ab1, CS_WCRMIN);
 648                 he_writel_mbox(he_dev, 0xe4b1, CS_WCRINC);
 649                 he_writel_mbox(he_dev, 0xdab1, CS_WCRDEC);
 650                 he_writel_mbox(he_dev, 0x64b1, CS_WCRCEIL);
 651
 652                 /* table 5.9 */
 653                 he_writel_mbox(he_dev, 0x6, CS_OTPPER);
 654                 he_writel_mbox(he_dev, 0x1e, CS_OTWPER);
 655         }
 656
 657         he_writel_mbox(he_dev, 0x8, CS_OTTLIM);
 658
 659         for (reg = 0; reg < 0x8; ++reg)
 660                 he_writel_mbox(he_dev, 0x0, CS_HGRRT0 + reg);
 661
 662 }
 663
 664 static int __devinit
 665 he_init_cs_block_rcm(struct he_dev *he_dev)
 666 {
 667         unsigned (*rategrid)[16][16];
 668         unsigned rate, delta;
 669         int i, j, reg;
 670
 671         unsigned rate_atmf, exp, man;
 672         unsigned long long rate_cps;
 673         int mult, buf, buf_limit = 4;
 674
 675         rategrid = kmalloc( sizeof(unsigned) * 16 * 16, GFP_KERNEL);
 676         if (!rategrid)
 677                 return -ENOMEM;
 678
 679         /* initialize rate grid group table */
 680
 681         for (reg = 0x0; reg < 0xff; ++reg)
 682                 he_writel_rcm(he_dev, 0x0, CONFIG_RCMABR + reg);
 683
 684         /* initialize rate controller groups */
 685
 686         for (reg = 0x100; reg < 0x1ff; ++reg)
 687                 he_writel_rcm(he_dev, 0x0, CONFIG_RCMABR + reg);
 688
 689         /* initialize tNrm lookup table */
 690
 691         /* the manual makes reference to a routine in a sample driver
 692            for proper configuration; fortunately, we only need this
 693            in order to support abr connection */
 694
 695         /* initialize rate to group table */
 696
 697         rate = he_dev->atm_dev->link_rate;
 698         delta = rate / 32;
 699
 700         /*
 701          * 2.4 transmit internal functions
 702          *
 703          * we construct a copy of the rate grid used by the scheduler
 704          * in order to construct the rate to group table below
 705          */
 706
 707         for (j = 0; j < 16; j++) {
 708                 (*rategrid)[0][j] = rate;
 709                 rate -= delta;
 710         }
 711
 712         for (i = 1; i < 16; i++)
 713                 for (j = 0; j < 16; j++)
 714                         if (i > 14)
 715                                 (*rategrid)[i][j] = (*rategrid)[i - 1][j] / 4;
 716                         else
 717                                 (*rategrid)[i][j] = (*rategrid)[i - 1][j] / 2;
 718
 719         /*
 720          * 2.4 transmit internal function
 721          *
 722          * this table maps the upper 5 bits of exponent and mantissa
 723          * of the atm forum representation of the rate into an index
 724          * on rate grid
 725          */
 726
 727         rate_atmf = 0;
 728         while (rate_atmf < 0x400) {
 729                 man = (rate_atmf & 0x1f) << 4;
 730                 exp = rate_atmf >> 5;
 731
 732                 /*
 733                         instead of '/ 512', use '>> 9' to prevent a call
 734                         to divdu3 on x86 platforms
 735                 */
 736                 rate_cps = (unsigned long long) (1 << exp) * (man + 512) >> 9;
 737
 738                 if (rate_cps < 10)
 739                         rate_cps = 10;  /* 2.2.1 minimum payload rate is 10 cps */
 740
 741                 for (i = 255; i > 0; i--)
 742                         if ((*rategrid)[i/16][i%16] >= rate_cps)
 743                                 break;   /* pick nearest rate instead? */
 744
 745                 /*
 746                  * each table entry is 16 bits: (rate grid index (8 bits)
 747                  * and a buffer limit (8 bits)
 748                  * there are two table entries in each 32-bit register
 749                  */
 750
 751 #ifdef notdef
 752                 buf = rate_cps * he_dev->tx_numbuffs /
 753                                 (he_dev->atm_dev->link_rate * 2);
 754 #else
 755                 /* this is pretty, but avoids _divdu3 and is mostly correct */
 756                 mult = he_dev->atm_dev->link_rate / ATM_OC3_PCR;
 757                 if (rate_cps > (272 * mult))
 758                         buf = 4;
 759                 else if (rate_cps > (204 * mult))
 760                         buf = 3;
 761                 else if (rate_cps > (136 * mult))
 762                         buf = 2;
 763                 else if (rate_cps > (68 * mult))
 764                         buf = 1;
 765                 else
 766                         buf = 0;
 767 #endif
 768                 if (buf > buf_limit)
 769                         buf = buf_limit;
 770                 reg = (reg << 16) | ((i << 8) | buf);
 771
 772 #define RTGTBL_OFFSET 0x400
 773
 774                 if (rate_atmf & 0x1)
 775                         he_writel_rcm(he_dev, reg,
 776                                 CONFIG_RCMABR + RTGTBL_OFFSET + (rate_atmf >> 1));
 777
 778                 ++rate_atmf;
 779         }
 780
 781         kfree(rategrid);
 782         return 0;
 783 }
 784
 785 static int __devinit
 786 he_init_group(struct he_dev *he_dev, int group)
 787 {
 788         int i;
 789
 790 #ifdef USE_RBPS
 791         /* small buffer pool */
 792 #ifdef USE_RBPS_POOL
 793         he_dev->rbps_pool = pci_pool_create("rbps", he_dev->pci_dev,
 794                         CONFIG_RBPS_BUFSIZE, 8, 0);
 795         if (he_dev->rbps_pool == NULL) {
 796                 hprintk("unable to create rbps pages\n");
 797                 return -ENOMEM;
 798         }
 799 #else /* !USE_RBPS_POOL */
 800         he_dev->rbps_pages = pci_alloc_consistent(he_dev->pci_dev,
 801                 CONFIG_RBPS_SIZE * CONFIG_RBPS_BUFSIZE, &he_dev->rbps_pages_phys);
 802         if (he_dev->rbps_pages == NULL) {
 803                 hprintk("unable to create rbps page pool\n");
 804                 return -ENOMEM;
 805         }
 806 #endif /* USE_RBPS_POOL */
 807
 808         he_dev->rbps_base = pci_alloc_consistent(he_dev->pci_dev,
 809                 CONFIG_RBPS_SIZE * sizeof(struct he_rbp), &he_dev->rbps_phys);
 810         if (he_dev->rbps_base == NULL) {
 811                 hprintk("failed to alloc rbps\n");
 812                 return -ENOMEM;
 813         }
 814         memset(he_dev->rbps_base, 0, CONFIG_RBPS_SIZE * sizeof(struct he_rbp));
 815         he_dev->rbps_virt = kmalloc(CONFIG_RBPS_SIZE * sizeof(struct he_virt), GFP_KERNEL);
 816
 817         for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
 818                 dma_addr_t dma_handle;
 819                 void *cpuaddr;
 820
 821 #ifdef USE_RBPS_POOL
 822                 cpuaddr = pci_pool_alloc(he_dev->rbps_pool, GFP_KERNEL|GFP_DMA, &dma_handle);
 823                 if (cpuaddr == NULL)
 824                         return -ENOMEM;
 825 #else
 826                 cpuaddr = he_dev->rbps_pages + (i * CONFIG_RBPS_BUFSIZE);
 827                 dma_handle = he_dev->rbps_pages_phys + (i * CONFIG_RBPS_BUFSIZE);
 828 #endif
 829
 830                 he_dev->rbps_virt[i].virt = cpuaddr;
 831                 he_dev->rbps_base[i].status = RBP_LOANED | RBP_SMALLBUF | (i << RBP_INDEX_OFF);
 832                 he_dev->rbps_base[i].phys = dma_handle;
 833
 834         }
 835         he_dev->rbps_tail = &he_dev->rbps_base[CONFIG_RBPS_SIZE - 1];
 836
 837         he_writel(he_dev, he_dev->rbps_phys, G0_RBPS_S + (group * 32));
 838         he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail),
 839                                                 G0_RBPS_T + (group * 32));
 840         he_writel(he_dev, CONFIG_RBPS_BUFSIZE/4,
 841                                                 G0_RBPS_BS + (group * 32));
 842         he_writel(he_dev,
 843                         RBP_THRESH(CONFIG_RBPS_THRESH) |
 844                         RBP_QSIZE(CONFIG_RBPS_SIZE - 1) |
 845                         RBP_INT_ENB,
 846                                                 G0_RBPS_QI + (group * 32));
 847 #else /* !USE_RBPS */
 848         he_writel(he_dev, 0x0, G0_RBPS_S + (group * 32));
 849         he_writel(he_dev, 0x0, G0_RBPS_T + (group * 32));
 850         he_writel(he_dev, 0x0, G0_RBPS_QI + (group * 32));
 851         he_writel(he_dev, RBP_THRESH(0x1) | RBP_QSIZE(0x0),
 852                                                 G0_RBPS_BS + (group * 32));
 853 #endif /* USE_RBPS */
 854
 855         /* large buffer pool */
 856 #ifdef USE_RBPL_POOL
 857         he_dev->rbpl_pool = pci_pool_create("rbpl", he_dev->pci_dev,
 858                         CONFIG_RBPL_BUFSIZE, 8, 0);
 859         if (he_dev->rbpl_pool == NULL) {
 860                 hprintk("unable to create rbpl pool\n");
 861                 return -ENOMEM;
 862         }
 863 #else /* !USE_RBPL_POOL */
 864         he_dev->rbpl_pages = (void *) pci_alloc_consistent(he_dev->pci_dev,
 865                 CONFIG_RBPL_SIZE * CONFIG_RBPL_BUFSIZE, &he_dev->rbpl_pages_phys);
 866         if (he_dev->rbpl_pages == NULL) {
 867                 hprintk("unable to create rbpl pages\n");
 868                 return -ENOMEM;
 869         }
 870 #endif /* USE_RBPL_POOL */
 871
 872         he_dev->rbpl_base = pci_alloc_consistent(he_dev->pci_dev,
 873                 CONFIG_RBPL_SIZE * sizeof(struct he_rbp), &he_dev->rbpl_phys);
 874         if (he_dev->rbpl_base == NULL) {
 875                 hprintk("failed to alloc rbpl\n");
 876                 return -ENOMEM;
 877         }
 878         memset(he_dev->rbpl_base, 0, CONFIG_RBPL_SIZE * sizeof(struct he_rbp));
 879         he_dev->rbpl_virt = kmalloc(CONFIG_RBPL_SIZE * sizeof(struct he_virt), GFP_KERNEL);
 880
 881         for (i = 0; i < CONFIG_RBPL_SIZE; ++i) {
 882                 dma_addr_t dma_handle;
 883                 void *cpuaddr;
 884
 885 #ifdef USE_RBPL_POOL
 886                 cpuaddr = pci_pool_alloc(he_dev->rbpl_pool, GFP_KERNEL|GFP_DMA, &dma_handle);
 887                 if (cpuaddr == NULL)
 888                         return -ENOMEM;
 889 #else
 890                 cpuaddr = he_dev->rbpl_pages + (i * CONFIG_RBPL_BUFSIZE);
 891                 dma_handle = he_dev->rbpl_pages_phys + (i * CONFIG_RBPL_BUFSIZE);
 892 #endif
 893
 894                 he_dev->rbpl_virt[i].virt = cpuaddr;
 895                 he_dev->rbpl_base[i].status = RBP_LOANED | (i << RBP_INDEX_OFF);
 896                 he_dev->rbpl_base[i].phys = dma_handle;
 897         }
 898         he_dev->rbpl_tail = &he_dev->rbpl_base[CONFIG_RBPL_SIZE - 1];
 899
 900         he_writel(he_dev, he_dev->rbpl_phys, G0_RBPL_S + (group * 32));
 901         he_writel(he_dev, RBPL_MASK(he_dev->rbpl_tail),
 902                                                 G0_RBPL_T + (group * 32));
 903         he_writel(he_dev, CONFIG_RBPL_BUFSIZE/4,
 904                                                 G0_RBPL_BS + (group * 32));
 905         he_writel(he_dev,
 906                         RBP_THRESH(CONFIG_RBPL_THRESH) |
 907                         RBP_QSIZE(CONFIG_RBPL_SIZE - 1) |
 908                         RBP_INT_ENB,
 909                                                 G0_RBPL_QI + (group * 32));
 910
 911         /* rx buffer ready queue */
 912
 913         he_dev->rbrq_base = pci_alloc_consistent(he_dev->pci_dev,
 914                 CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq), &he_dev->rbrq_phys);
 915         if (he_dev->rbrq_base == NULL) {
 916                 hprintk("failed to allocate rbrq\n");
 917                 return -ENOMEM;
 918         }
 919         memset(he_dev->rbrq_base, 0, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq));
 920
 921         he_dev->rbrq_head = he_dev->rbrq_base;
 922         he_writel(he_dev, he_dev->rbrq_phys, G0_RBRQ_ST + (group * 16));
 923         he_writel(he_dev, 0, G0_RBRQ_H + (group * 16));
 924         he_writel(he_dev,
 925                 RBRQ_THRESH(CONFIG_RBRQ_THRESH) | RBRQ_SIZE(CONFIG_RBRQ_SIZE - 1),
 926                                                 G0_RBRQ_Q + (group * 16));
 927         if (irq_coalesce) {
 928                 hprintk("coalescing interrupts\n");
 929                 he_writel(he_dev, RBRQ_TIME(768) | RBRQ_COUNT(7),
 930                                                 G0_RBRQ_I + (group * 16));
 931         } else
 932                 he_writel(he_dev, RBRQ_TIME(0) | RBRQ_COUNT(1),
 933                                                 G0_RBRQ_I + (group * 16));
 934
 935         /* tx buffer ready queue */
 936
 937         he_dev->tbrq_base = pci_alloc_consistent(he_dev->pci_dev,
 938                 CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq), &he_dev->tbrq_phys);
 939         if (he_dev->tbrq_base == NULL) {
 940                 hprintk("failed to allocate tbrq\n");
 941                 return -ENOMEM;
 942         }
 943         memset(he_dev->tbrq_base, 0, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq));
 944
 945         he_dev->tbrq_head = he_dev->tbrq_base;
 946
 947         he_writel(he_dev, he_dev->tbrq_phys, G0_TBRQ_B_T + (group * 16));
 948         he_writel(he_dev, 0, G0_TBRQ_H + (group * 16));
 949         he_writel(he_dev, CONFIG_TBRQ_SIZE - 1, G0_TBRQ_S + (group * 16));
 950         he_writel(he_dev, CONFIG_TBRQ_THRESH, G0_TBRQ_THRESH + (group * 16));
 951
 952         return 0;
 953 }
 954
 955 static int __devinit
 956 he_init_irq(struct he_dev *he_dev)
 957 {
 958         int i;
 959
 960         /* 2.9.3.5  tail offset for each interrupt queue is located after the
 961                     end of the interrupt queue */
 962
 963         he_dev->irq_base = pci_alloc_consistent(he_dev->pci_dev,
 964                         (CONFIG_IRQ_SIZE+1) * sizeof(struct he_irq), &he_dev->irq_phys);
 965         if (he_dev->irq_base == NULL) {
 966                 hprintk("failed to allocate irq\n");
 967                 return -ENOMEM;
 968         }
 969         he_dev->irq_tailoffset = (unsigned *)
 970                                         &he_dev->irq_base[CONFIG_IRQ_SIZE];
 971         *he_dev->irq_tailoffset = 0;
 972         he_dev->irq_head = he_dev->irq_base;
 973         he_dev->irq_tail = he_dev->irq_base;
 974
 975         for (i = 0; i < CONFIG_IRQ_SIZE; ++i)
 976                 he_dev->irq_base[i].isw = ITYPE_INVALID;
 977
 978         he_writel(he_dev, he_dev->irq_phys, IRQ0_BASE);
 979         he_writel(he_dev,
 980                 IRQ_SIZE(CONFIG_IRQ_SIZE) | IRQ_THRESH(CONFIG_IRQ_THRESH),
 981                                                                 IRQ0_HEAD);
 982         he_writel(he_dev, IRQ_INT_A | IRQ_TYPE_LINE, IRQ0_CNTL);
 983         he_writel(he_dev, 0x0, IRQ0_DATA);
 984
 985         he_writel(he_dev, 0x0, IRQ1_BASE);
 986         he_writel(he_dev, 0x0, IRQ1_HEAD);
 987         he_writel(he_dev, 0x0, IRQ1_CNTL);
 988         he_writel(he_dev, 0x0, IRQ1_DATA);
 989
 990         he_writel(he_dev, 0x0, IRQ2_BASE);
 991         he_writel(he_dev, 0x0, IRQ2_HEAD);
 992         he_writel(he_dev, 0x0, IRQ2_CNTL);
 993         he_writel(he_dev, 0x0, IRQ2_DATA);
 994
 995         he_writel(he_dev, 0x0, IRQ3_BASE);
 996         he_writel(he_dev, 0x0, IRQ3_HEAD);
 997         he_writel(he_dev, 0x0, IRQ3_CNTL);
 998         he_writel(he_dev, 0x0, IRQ3_DATA);
 999
1000         /* 2.9.3.2 interrupt queue mapping registers */
1001
1002         he_writel(he_dev, 0x0, GRP_10_MAP);
1003         he_writel(he_dev, 0x0, GRP_32_MAP);
1004         he_writel(he_dev, 0x0, GRP_54_MAP);
1005         he_writel(he_dev, 0x0, GRP_76_MAP);
1006
1007         if (request_irq(he_dev->pci_dev->irq, he_irq_handler, IRQF_DISABLED|IRQF_SHARED, DEV_LABEL, he_dev)) {
1008                 hprintk("irq %d already in use\n", he_dev->pci_dev->irq);
1009                 return -EINVAL;
1010         }
1011
1012         he_dev->irq = he_dev->pci_dev->irq;
1013
1014         return 0;
1015 }
1016
1017 static int __devinit
1018 he_start(struct atm_dev *dev)
1019 {
1020         struct he_dev *he_dev;
1021         struct pci_dev *pci_dev;
1022         unsigned long membase;
1023
1024         u16 command;
1025         u32 gen_cntl_0, host_cntl, lb_swap;
1026         u8 cache_size, timer;
1027
1028         unsigned err;
1029         unsigned int status, reg;
1030         int i, group;
1031
1032         he_dev = HE_DEV(dev);
1033         pci_dev = he_dev->pci_dev;
1034
1035         membase = pci_resource_start(pci_dev, 0);
1036         HPRINTK("membase = 0x%lx  irq = %d.\n", membase, pci_dev->irq);
1037
1038         /*
1039          * pci bus controller initialization
1040          */
1041
1042         /* 4.3 pci bus controller-specific initialization */
1043         if (pci_read_config_dword(pci_dev, GEN_CNTL_0, &gen_cntl_0) != 0) {
1044                 hprintk("can't read GEN_CNTL_0\n");
1045                 return -EINVAL;
1046         }
1047         gen_cntl_0 |= (MRL_ENB | MRM_ENB | IGNORE_TIMEOUT);
1048         if (pci_write_config_dword(pci_dev, GEN_CNTL_0, gen_cntl_0) != 0) {
1049                 hprintk("can't write GEN_CNTL_0.\n");
1050                 return -EINVAL;
1051         }
1052
1053         if (pci_read_config_word(pci_dev, PCI_COMMAND, &command) != 0) {
1054                 hprintk("can't read PCI_COMMAND.\n");
1055                 return -EINVAL;
1056         }
1057
1058         command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE);
1059         if (pci_write_config_word(pci_dev, PCI_COMMAND, command) != 0) {
1060                 hprintk("can't enable memory.\n");
1061                 return -EINVAL;
1062         }
1063
1064         if (pci_read_config_byte(pci_dev, PCI_CACHE_LINE_SIZE, &cache_size)) {
1065                 hprintk("can't read cache line size?\n");
1066                 return -EINVAL;
1067         }
1068
1069         if (cache_size < 16) {
1070                 cache_size = 16;
1071                 if (pci_write_config_byte(pci_dev, PCI_CACHE_LINE_SIZE, cache_size))
1072                         hprintk("can't set cache line size to %d\n", cache_size);
1073         }
1074
1075         if (pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &timer)) {
1076                 hprintk("can't read latency timer?\n");
1077                 return -EINVAL;
1078         }
1079
1080         /* from table 3.9
1081          *
1082          * LAT_TIMER = 1 + AVG_LAT + BURST_SIZE/BUS_SIZE
1083          *
1084          * AVG_LAT: The average first data read/write latency [maximum 16 clock cycles]
1085          * BURST_SIZE: 1536 bytes (read) for 622, 768 bytes (read) for 155 [192 clock cycles]
1086          *
1087          */
1088 #define LAT_TIMER 209
1089         if (timer < LAT_TIMER) {
1090                 HPRINTK("latency timer was %d, setting to %d\n", timer, LAT_TIMER);
1091                 timer = LAT_TIMER;
1092                 if (pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, timer))
1093                         hprintk("can't set latency timer to %d\n", timer);
1094         }
1095
1096         if (!(he_dev->membase = ioremap(membase, HE_REGMAP_SIZE))) {
1097                 hprintk("can't set up page mapping\n");
1098                 return -EINVAL;
1099         }
1100
1101         /* 4.4 card reset */
1102         he_writel(he_dev, 0x0, RESET_CNTL);
1103         he_writel(he_dev, 0xff, RESET_CNTL);
1104
1105         udelay(16*1000);        /* 16 ms */
1106         status = he_readl(he_dev, RESET_CNTL);
1107         if ((status & BOARD_RST_STATUS) == 0) {
1108                 hprintk("reset failed\n");
1109                 return -EINVAL;
1110         }
1111
1112         /* 4.5 set bus width */
1113         host_cntl = he_readl(he_dev, HOST_CNTL);
1114         if (host_cntl & PCI_BUS_SIZE64)
1115                 gen_cntl_0 |= ENBL_64;
1116         else
1117                 gen_cntl_0 &= ~ENBL_64;
1118
1119         if (disable64 == 1) {
1120                 hprintk("disabling 64-bit pci bus transfers\n");
1121                 gen_cntl_0 &= ~ENBL_64;
1122         }
1123
1124         if (gen_cntl_0 & ENBL_64)
1125                 hprintk("64-bit transfers enabled\n");
1126
1127         pci_write_config_dword(pci_dev, GEN_CNTL_0, gen_cntl_0);
1128
1129         /* 4.7 read prom contents */
1130         for (i = 0; i < PROD_ID_LEN; ++i)
1131                 he_dev->prod_id[i] = read_prom_byte(he_dev, PROD_ID + i);
1132
1133         he_dev->media = read_prom_byte(he_dev, MEDIA);
1134
1135         for (i = 0; i < 6; ++i)
1136                 dev->esi[i] = read_prom_byte(he_dev, MAC_ADDR + i);
1137
1138         hprintk("%s%s, %x:%x:%x:%x:%x:%x\n",
1139                                 he_dev->prod_id,
1140                                         he_dev->media & 0x40 ? "SM" : "MM",
1141                                                 dev->esi[0],
1142                                                 dev->esi[1],
1143                                                 dev->esi[2],
1144                                                 dev->esi[3],
1145                                                 dev->esi[4],
1146                                                 dev->esi[5]);
1147         he_dev->atm_dev->link_rate = he_is622(he_dev) ?
1148                                                 ATM_OC12_PCR : ATM_OC3_PCR;
1149
1150         /* 4.6 set host endianess */
1151         lb_swap = he_readl(he_dev, LB_SWAP);
1152         if (he_is622(he_dev))
1153                 lb_swap &= ~XFER_SIZE;          /* 4 cells */
1154         else
1155                 lb_swap |= XFER_SIZE;           /* 8 cells */
1156 #ifdef __BIG_ENDIAN
1157         lb_swap |= DESC_WR_SWAP | INTR_SWAP | BIG_ENDIAN_HOST;
1158 #else
1159         lb_swap &= ~(DESC_WR_SWAP | INTR_SWAP | BIG_ENDIAN_HOST |
1160                         DATA_WR_SWAP | DATA_RD_SWAP | DESC_RD_SWAP);
1161 #endif /* __BIG_ENDIAN */
1162         he_writel(he_dev, lb_swap, LB_SWAP);
1163
1164         /* 4.8 sdram controller initialization */
1165         he_writel(he_dev, he_is622(he_dev) ? LB_64_ENB : 0x0, SDRAM_CTL);
1166
1167         /* 4.9 initialize rnum value */
1168         lb_swap |= SWAP_RNUM_MAX(0xf);
1169         he_writel(he_dev, lb_swap, LB_SWAP);
1170
1171         /* 4.10 initialize the interrupt queues */
1172         if ((err = he_init_irq(he_dev)) != 0)
1173                 return err;
1174
1175         /* 4.11 enable pci bus controller state machines */
1176         host_cntl |= (OUTFF_ENB | CMDFF_ENB |
1177                                 QUICK_RD_RETRY | QUICK_WR_RETRY | PERR_INT_ENB);
1178         he_writel(he_dev, host_cntl, HOST_CNTL);
1179
1180         gen_cntl_0 |= INT_PROC_ENBL|INIT_ENB;
1181         pci_write_config_dword(pci_dev, GEN_CNTL_0, gen_cntl_0);
1182
1183         /*
1184          * atm network controller initialization
1185          */
1186
1187         /* 5.1.1 generic configuration state */
1188
1189         /*
1190          *              local (cell) buffer memory map
1191          *
1192          *             HE155                          HE622
1193          *
1194          *        0 ____________1023 bytes  0 _______________________2047 bytes
1195          *         |            |            |                   |   |
1196          *         |  utility   |            |        rx0        |   |
1197          *        5|____________|         255|___________________| u |
1198          *        6|            |         256|                   | t |
1199          *         |            |            |                   | i |
1200          *         |    rx0     |     row    |        tx         | l |
1201          *         |            |            |                   | i |
1202          *         |            |         767|___________________| t |
1203          *      517|____________|         768|                   | y |
1204          * row  518|            |            |        rx1        |   |
1205          *         |            |        1023|___________________|___|
1206          *         |            |
1207          *         |    tx      |
1208          *         |            |
1209          *         |            |
1210          *     1535|____________|
1211          *     1536|            |
1212          *         |    rx1     |
1213          *     2047|____________|
1214          *
1215          */
1216
1217         /* total 4096 connections */
1218         he_dev->vcibits = CONFIG_DEFAULT_VCIBITS;
1219         he_dev->vpibits = CONFIG_DEFAULT_VPIBITS;
1220
1221         if (nvpibits != -1 && nvcibits != -1 && nvpibits+nvcibits != HE_MAXCIDBITS) {
1222                 hprintk("nvpibits + nvcibits != %d\n", HE_MAXCIDBITS);
1223                 return -ENODEV;
1224         }
1225
1226         if (nvpibits != -1) {
1227                 he_dev->vpibits = nvpibits;
1228                 he_dev->vcibits = HE_MAXCIDBITS - nvpibits;
1229         }
1230
1231         if (nvcibits != -1) {
1232                 he_dev->vcibits = nvcibits;
1233                 he_dev->vpibits = HE_MAXCIDBITS - nvcibits;
1234         }
1235
1236
1237         if (he_is622(he_dev)) {
1238                 he_dev->cells_per_row = 40;
1239                 he_dev->bytes_per_row = 2048;
1240                 he_dev->r0_numrows = 256;
1241                 he_dev->tx_numrows = 512;
1242                 he_dev->r1_numrows = 256;
1243                 he_dev->r0_startrow = 0;
1244                 he_dev->tx_startrow = 256;
1245                 he_dev->r1_startrow = 768;
1246         } else {
1247                 he_dev->cells_per_row = 20;
1248                 he_dev->bytes_per_row = 1024;
1249                 he_dev->r0_numrows = 512;
1250                 he_dev->tx_numrows = 1018;
1251                 he_dev->r1_numrows = 512;
1252                 he_dev->r0_startrow = 6;
1253                 he_dev->tx_startrow = 518;
1254                 he_dev->r1_startrow = 1536;
1255         }
1256
1257         he_dev->cells_per_lbuf = 4;
1258         he_dev->buffer_limit = 4;
1259         he_dev->r0_numbuffs = he_dev->r0_numrows *
1260                                 he_dev->cells_per_row / he_dev->cells_per_lbuf;
1261         if (he_dev->r0_numbuffs > 2560)
1262                 he_dev->r0_numbuffs = 2560;
1263
1264         he_dev->r1_numbuffs = he_dev->r1_numrows *
1265                                 he_dev->cells_per_row / he_dev->cells_per_lbuf;
1266         if (he_dev->r1_numbuffs > 2560)
1267                 he_dev->r1_numbuffs = 2560;
1268
1269         he_dev->tx_numbuffs = he_dev->tx_numrows *
1270                                 he_dev->cells_per_row / he_dev->cells_per_lbuf;
1271         if (he_dev->tx_numbuffs > 5120)
1272                 he_dev->tx_numbuffs = 5120;
1273
1274         /* 5.1.2 configure hardware dependent registers */
1275
1276         he_writel(he_dev,
1277                 SLICE_X(0x2) | ARB_RNUM_MAX(0xf) | TH_PRTY(0x3) |
1278                 RH_PRTY(0x3) | TL_PRTY(0x2) | RL_PRTY(0x1) |
1279                 (he_is622(he_dev) ? BUS_MULTI(0x28) : BUS_MULTI(0x46)) |
1280                 (he_is622(he_dev) ? NET_PREF(0x50) : NET_PREF(0x8c)),
1281                                                                 LBARB);
1282
1283         he_writel(he_dev, BANK_ON |
1284                 (he_is622(he_dev) ? (REF_RATE(0x384) | WIDE_DATA) : REF_RATE(0x150)),
1285                                                                 SDRAMCON);
1286
1287         he_writel(he_dev,
1288                 (he_is622(he_dev) ? RM_BANK_WAIT(1) : RM_BANK_WAIT(0)) |
1289                                                 RM_RW_WAIT(1), RCMCONFIG);
1290         he_writel(he_dev,
1291                 (he_is622(he_dev) ? TM_BANK_WAIT(2) : TM_BANK_WAIT(1)) |
1292                                                 TM_RW_WAIT(1), TCMCONFIG);
1293
1294         he_writel(he_dev, he_dev->cells_per_lbuf * ATM_CELL_PAYLOAD, LB_CONFIG);
1295
1296         he_writel(he_dev,
1297                 (he_is622(he_dev) ? UT_RD_DELAY(8) : UT_RD_DELAY(0)) |
1298                 (he_is622(he_dev) ? RC_UT_MODE(0) : RC_UT_MODE(1)) |
1299                 RX_VALVP(he_dev->vpibits) |
1300                 RX_VALVC(he_dev->vcibits),                       RC_CONFIG);
1301
1302         he_writel(he_dev, DRF_THRESH(0x20) |
1303                 (he_is622(he_dev) ? TX_UT_MODE(0) : TX_UT_MODE(1)) |
1304                 TX_VCI_MASK(he_dev->vcibits) |
1305                 LBFREE_CNT(he_dev->tx_numbuffs),                TX_CONFIG);
1306
1307         he_writel(he_dev, 0x0, TXAAL5_PROTO);
1308
1309         he_writel(he_dev, PHY_INT_ENB |
1310                 (he_is622(he_dev) ? PTMR_PRE(67 - 1) : PTMR_PRE(50 - 1)),
1311                                                                 RH_CONFIG);
1312
1313         /* 5.1.3 initialize connection memory */
1314
1315         for (i = 0; i < TCM_MEM_SIZE; ++i)
1316                 he_writel_tcm(he_dev, 0, i);
1317
1318         for (i = 0; i < RCM_MEM_SIZE; ++i)
1319                 he_writel_rcm(he_dev, 0, i);
1320
1321         /*
1322          *      transmit connection memory map
1323          *
1324          *                  tx memory
1325          *          0x0 ___________________
1326          *             |                   |
1327          *             |                   |
1328          *             |       TSRa        |
1329          *             |                   |
1330          *             |                   |
1331          *       0x8000|___________________|
1332          *             |                   |
1333          *             |       TSRb        |
1334          *       0xc000|___________________|
1335          *             |                   |
1336          *             |       TSRc        |
1337          *       0xe000|___________________|
1338          *             |       TSRd        |
1339          *       0xf000|___________________|
1340          *             |       tmABR       |
1341          *      0x10000|___________________|
1342          *             |                   |
1343          *             |       tmTPD       |
1344          *             |___________________|
1345          *             |                   |
1346          *                      ....
1347          *      0x1ffff|___________________|
1348          *
1349          *
1350          */
1351
1352         he_writel(he_dev, CONFIG_TSRB, TSRB_BA);
1353         he_writel(he_dev, CONFIG_TSRC, TSRC_BA);
1354         he_writel(he_dev, CONFIG_TSRD, TSRD_BA);
1355         he_writel(he_dev, CONFIG_TMABR, TMABR_BA);
1356         he_writel(he_dev, CONFIG_TPDBA, TPD_BA);
1357
1358
1359         /*
1360          *      receive connection memory map
1361          *
1362          *          0x0 ___________________
1363          *             |                   |
1364          *             |                   |
1365          *             |       RSRa        |
1366          *             |                   |
1367          *             |                   |
1368          *       0x8000|___________________|
1369          *             |                   |
1370          *             |             rx0/1 |
1371          *             |       LBM         |   link lists of local
1372          *             |             tx    |   buffer memory
1373          *             |                   |
1374          *       0xd000|___________________|
1375          *             |                   |
1376          *             |      rmABR        |
1377          *       0xe000|___________________|
1378          *             |                   |
1379          *             |       RSRb        |
1380          *             |___________________|
1381          *             |                   |
1382          *                      ....
1383          *       0xffff|___________________|
1384          */
1385
1386         he_writel(he_dev, 0x08000, RCMLBM_BA);
1387         he_writel(he_dev, 0x0e000, RCMRSRB_BA);
1388         he_writel(he_dev, 0x0d800, RCMABR_BA);
1389
1390         /* 5.1.4 initialize local buffer free pools linked lists */
1391
1392         he_init_rx_lbfp0(he_dev);
1393         he_init_rx_lbfp1(he_dev);
1394
1395         he_writel(he_dev, 0x0, RLBC_H);
1396         he_writel(he_dev, 0x0, RLBC_T);
1397         he_writel(he_dev, 0x0, RLBC_H2);
1398
1399         he_writel(he_dev, 512, RXTHRSH);        /* 10% of r0+r1 buffers */
1400         he_writel(he_dev, 256, LITHRSH);        /* 5% of r0+r1 buffers */
1401
1402         he_init_tx_lbfp(he_dev);
1403
1404         he_writel(he_dev, he_is622(he_dev) ? 0x104780 : 0x800, UBUFF_BA);
1405
1406         /* 5.1.5 initialize intermediate receive queues */
1407
1408         if (he_is622(he_dev)) {
1409                 he_writel(he_dev, 0x000f, G0_INMQ_S);
1410                 he_writel(he_dev, 0x200f, G0_INMQ_L);
1411
1412                 he_writel(he_dev, 0x001f, G1_INMQ_S);
1413                 he_writel(he_dev, 0x201f, G1_INMQ_L);
1414
1415                 he_writel(he_dev, 0x002f, G2_INMQ_S);
1416                 he_writel(he_dev, 0x202f, G2_INMQ_L);
1417
1418                 he_writel(he_dev, 0x003f, G3_INMQ_S);
1419                 he_writel(he_dev, 0x203f, G3_INMQ_L);
1420
1421                 he_writel(he_dev, 0x004f, G4_INMQ_S);
1422                 he_writel(he_dev, 0x204f, G4_INMQ_L);
1423
1424                 he_writel(he_dev, 0x005f, G5_INMQ_S);
1425                 he_writel(he_dev, 0x205f, G5_INMQ_L);
1426
1427                 he_writel(he_dev, 0x006f, G6_INMQ_S);
1428                 he_writel(he_dev, 0x206f, G6_INMQ_L);
1429
1430                 he_writel(he_dev, 0x007f, G7_INMQ_S);
1431                 he_writel(he_dev, 0x207f, G7_INMQ_L);
1432         } else {
1433                 he_writel(he_dev, 0x0000, G0_INMQ_S);
1434                 he_writel(he_dev, 0x0008, G0_INMQ_L);
1435
1436                 he_writel(he_dev, 0x0001, G1_INMQ_S);
1437                 he_writel(he_dev, 0x0009, G1_INMQ_L);
1438
1439                 he_writel(he_dev, 0x0002, G2_INMQ_S);
1440                 he_writel(he_dev, 0x000a, G2_INMQ_L);
1441
1442                 he_writel(he_dev, 0x0003, G3_INMQ_S);
1443                 he_writel(he_dev, 0x000b, G3_INMQ_L);
1444
1445                 he_writel(he_dev, 0x0004, G4_INMQ_S);
1446                 he_writel(he_dev, 0x000c, G4_INMQ_L);
1447
1448                 he_writel(he_dev, 0x0005, G5_INMQ_S);
1449                 he_writel(he_dev, 0x000d, G5_INMQ_L);
1450
1451                 he_writel(he_dev, 0x0006, G6_INMQ_S);
1452                 he_writel(he_dev, 0x000e, G6_INMQ_L);
1453
1454                 he_writel(he_dev, 0x0007, G7_INMQ_S);
1455                 he_writel(he_dev, 0x000f, G7_INMQ_L);
1456         }
1457
1458         /* 5.1.6 application tunable parameters */
1459
1460         he_writel(he_dev, 0x0, MCC);
1461         he_writel(he_dev, 0x0, OEC);
1462         he_writel(he_dev, 0x0, DCC);
1463         he_writel(he_dev, 0x0, CEC);
1464
1465         /* 5.1.7 cs block initialization */
1466
1467         he_init_cs_block(he_dev);
1468
1469         /* 5.1.8 cs block connection memory initialization */
1470
1471         if (he_init_cs_block_rcm(he_dev) < 0)
1472                 return -ENOMEM;
1473
1474         /* 5.1.10 initialize host structures */
1475
1476         he_init_tpdrq(he_dev);
1477
1478 #ifdef USE_TPD_POOL
1479         he_dev->tpd_pool = pci_pool_create("tpd", he_dev->pci_dev,
1480                 sizeof(struct he_tpd), TPD_ALIGNMENT, 0);
1481         if (he_dev->tpd_pool == NULL) {
1482                 hprintk("unable to create tpd pci_pool\n");
1483                 return -ENOMEM;
1484         }
1485
1486         INIT_LIST_HEAD(&he_dev->outstanding_tpds);
1487 #else
1488         he_dev->tpd_base = (void *) pci_alloc_consistent(he_dev->pci_dev,
1489                         CONFIG_NUMTPDS * sizeof(struct he_tpd), &he_dev->tpd_base_phys);
1490         if (!he_dev->tpd_base)
1491                 return -ENOMEM;
1492
1493         for (i = 0; i < CONFIG_NUMTPDS; ++i) {
1494                 he_dev->tpd_base[i].status = (i << TPD_ADDR_SHIFT);
1495                 he_dev->tpd_base[i].inuse = 0;
1496         }
1497
1498         he_dev->tpd_head = he_dev->tpd_base;
1499         he_dev->tpd_end = &he_dev->tpd_base[CONFIG_NUMTPDS - 1];
1500 #endif
1501
1502         if (he_init_group(he_dev, 0) != 0)
1503                 return -ENOMEM;
1504
1505         for (group = 1; group < HE_NUM_GROUPS; ++group) {
1506                 he_writel(he_dev, 0x0, G0_RBPS_S + (group * 32));
1507                 he_writel(he_dev, 0x0, G0_RBPS_T + (group * 32));
1508                 he_writel(he_dev, 0x0, G0_RBPS_QI + (group * 32));
1509                 he_writel(he_dev, RBP_THRESH(0x1) | RBP_QSIZE(0x0),
1510                                                 G0_RBPS_BS + (group * 32));
1511
1512                 he_writel(he_dev, 0x0, G0_RBPL_S + (group * 32));
1513                 he_writel(he_dev, 0x0, G0_RBPL_T + (group * 32));
1514                 he_writel(he_dev, RBP_THRESH(0x1) | RBP_QSIZE(0x0),
1515                                                 G0_RBPL_QI + (group * 32));
1516                 he_writel(he_dev, 0x0, G0_RBPL_BS + (group * 32));
1517
1518                 he_writel(he_dev, 0x0, G0_RBRQ_ST + (group * 16));
1519                 he_writel(he_dev, 0x0, G0_RBRQ_H + (group * 16));
1520                 he_writel(he_dev, RBRQ_THRESH(0x1) | RBRQ_SIZE(0x0),
1521                                                 G0_RBRQ_Q + (group * 16));
1522                 he_writel(he_dev, 0x0, G0_RBRQ_I + (group * 16));
1523
1524                 he_writel(he_dev, 0x0, G0_TBRQ_B_T + (group * 16));
1525                 he_writel(he_dev, 0x0, G0_TBRQ_H + (group * 16));
1526                 he_writel(he_dev, TBRQ_THRESH(0x1),
1527                                                 G0_TBRQ_THRESH + (group * 16));
1528                 he_writel(he_dev, 0x0, G0_TBRQ_S + (group * 16));
1529         }
1530
1531         /* host status page */
1532
1533         he_dev->hsp = pci_alloc_consistent(he_dev->pci_dev,
1534                                 sizeof(struct he_hsp), &he_dev->hsp_phys);
1535         if (he_dev->hsp == NULL) {
1536                 hprintk("failed to allocate host status page\n");
1537                 return -ENOMEM;
1538         }
1539         memset(he_dev->hsp, 0, sizeof(struct he_hsp));
1540         he_writel(he_dev, he_dev->hsp_phys, HSP_BA);
1541
1542         /* initialize framer */
1543
1544 #ifdef CONFIG_ATM_HE_USE_SUNI
1545         suni_init(he_dev->atm_dev);
1546         if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->start)
1547                 he_dev->atm_dev->phy->start(he_dev->atm_dev);
1548 #endif /* CONFIG_ATM_HE_USE_SUNI */
1549
1550         if (sdh) {
1551                 /* this really should be in suni.c but for now... */
1552                 int val;
1553
1554                 val = he_phy_get(he_dev->atm_dev, SUNI_TPOP_APM);
1555                 val = (val & ~SUNI_TPOP_APM_S) | (SUNI_TPOP_S_SDH << SUNI_TPOP_APM_S_SHIFT);
1556                 he_phy_put(he_dev->atm_dev, val, SUNI_TPOP_APM);
1557         }
1558
1559         /* 5.1.12 enable transmit and receive */
1560
1561         reg = he_readl_mbox(he_dev, CS_ERCTL0);
1562         reg |= TX_ENABLE|ER_ENABLE;
1563         he_writel_mbox(he_dev, reg, CS_ERCTL0);
1564
1565         reg = he_readl(he_dev, RC_CONFIG);
1566         reg |= RX_ENABLE;
1567         he_writel(he_dev, reg, RC_CONFIG);
1568
1569         for (i = 0; i < HE_NUM_CS_STPER; ++i) {
1570                 he_dev->cs_stper[i].inuse = 0;
1571                 he_dev->cs_stper[i].pcr = -1;
1572         }
1573         he_dev->total_bw = 0;
1574
1575
1576         /* atm linux initialization */
1577
1578         he_dev->atm_dev->ci_range.vpi_bits = he_dev->vpibits;
1579         he_dev->atm_dev->ci_range.vci_bits = he_dev->vcibits;
1580
1581         he_dev->irq_peak = 0;
1582         he_dev->rbrq_peak = 0;
1583         he_dev->rbpl_peak = 0;
1584         he_dev->tbrq_peak = 0;
1585
1586         HPRINTK("hell bent for leather!\n");
1587
1588         return 0;
1589 }
1590
1591 static void
1592 he_stop(struct he_dev *he_dev)
1593 {
1594         u16 command;
1595         u32 gen_cntl_0, reg;
1596         struct pci_dev *pci_dev;
1597
1598         pci_dev = he_dev->pci_dev;
1599
1600         /* disable interrupts */
1601
1602         if (he_dev->membase) {
1603                 pci_read_config_dword(pci_dev, GEN_CNTL_0, &gen_cntl_0);
1604                 gen_cntl_0 &= ~(INT_PROC_ENBL | INIT_ENB);
1605                 pci_write_config_dword(pci_dev, GEN_CNTL_0, gen_cntl_0);
1606
1607 #ifdef USE_TASKLET
1608                 tasklet_disable(&he_dev->tasklet);
1609 #endif
1610
1611                 /* disable recv and transmit */
1612
1613                 reg = he_readl_mbox(he_dev, CS_ERCTL0);
1614                 reg &= ~(TX_ENABLE|ER_ENABLE);
1615                 he_writel_mbox(he_dev, reg, CS_ERCTL0);
1616
1617                 reg = he_readl(he_dev, RC_CONFIG);
1618                 reg &= ~(RX_ENABLE);
1619                 he_writel(he_dev, reg, RC_CONFIG);
1620         }
1621
1622 #ifdef CONFIG_ATM_HE_USE_SUNI
1623         if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->stop)
1624                 he_dev->atm_dev->phy->stop(he_dev->atm_dev);
1625 #endif /* CONFIG_ATM_HE_USE_SUNI */
1626
1627         if (he_dev->irq)
1628                 free_irq(he_dev->irq, he_dev);
1629
1630         if (he_dev->irq_base)
1631                 pci_free_consistent(he_dev->pci_dev, (CONFIG_IRQ_SIZE+1)
1632                         * sizeof(struct he_irq), he_dev->irq_base, he_dev->irq_phys);
1633
1634         if (he_dev->hsp)
1635                 pci_free_consistent(he_dev->pci_dev, sizeof(struct he_hsp),
1636                                                 he_dev->hsp, he_dev->hsp_phys);
1637
1638         if (he_dev->rbpl_base) {
1639 #ifdef USE_RBPL_POOL
1640                 int i;
1641
1642                 for (i = 0; i < CONFIG_RBPL_SIZE; ++i) {
1643                         void *cpuaddr = he_dev->rbpl_virt[i].virt;
1644                         dma_addr_t dma_handle = he_dev->rbpl_base[i].phys;
1645
1646                         pci_pool_free(he_dev->rbpl_pool, cpuaddr, dma_handle);
1647                 }
1648 #else
1649                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPL_SIZE
1650                         * CONFIG_RBPL_BUFSIZE, he_dev->rbpl_pages, he_dev->rbpl_pages_phys);
1651 #endif
1652                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPL_SIZE
1653                         * sizeof(struct he_rbp), he_dev->rbpl_base, he_dev->rbpl_phys);
1654         }
1655
1656 #ifdef USE_RBPL_POOL
1657         if (he_dev->rbpl_pool)
1658                 pci_pool_destroy(he_dev->rbpl_pool);
1659 #endif
1660
1661 #ifdef USE_RBPS
1662         if (he_dev->rbps_base) {
1663 #ifdef USE_RBPS_POOL
1664                 int i;
1665
1666                 for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
1667                         void *cpuaddr = he_dev->rbps_virt[i].virt;
1668                         dma_addr_t dma_handle = he_dev->rbps_base[i].phys;
1669
1670                         pci_pool_free(he_dev->rbps_pool, cpuaddr, dma_handle);
1671                 }
1672 #else
1673                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
1674                         * CONFIG_RBPS_BUFSIZE, he_dev->rbps_pages, he_dev->rbps_pages_phys);
1675 #endif
1676                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
1677                         * sizeof(struct he_rbp), he_dev->rbps_base, he_dev->rbps_phys);
1678         }
1679
1680 #ifdef USE_RBPS_POOL
1681         if (he_dev->rbps_pool)
1682                 pci_pool_destroy(he_dev->rbps_pool);
1683 #endif
1684
1685 #endif /* USE_RBPS */
1686
1687         if (he_dev->rbrq_base)
1688                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq),
1689                                                         he_dev->rbrq_base, he_dev->rbrq_phys);
1690
1691         if (he_dev->tbrq_base)
1692                 pci_free_consistent(he_dev->pci_dev, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq),
1693                                                         he_dev->tbrq_base, he_dev->tbrq_phys);
1694
1695         if (he_dev->tpdrq_base)
1696                 pci_free_consistent(he_dev->pci_dev, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq),
1697                                                         he_dev->tpdrq_base, he_dev->tpdrq_phys);
1698
1699 #ifdef USE_TPD_POOL
1700         if (he_dev->tpd_pool)
1701                 pci_pool_destroy(he_dev->tpd_pool);
1702 #else
1703         if (he_dev->tpd_base)
1704                 pci_free_consistent(he_dev->pci_dev, CONFIG_NUMTPDS * sizeof(struct he_tpd),
1705                                                         he_dev->tpd_base, he_dev->tpd_base_phys);
1706 #endif
1707
1708         if (he_dev->pci_dev) {
1709                 pci_read_config_word(he_dev->pci_dev, PCI_COMMAND, &command);
1710                 command &= ~(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
1711                 pci_write_config_word(he_dev->pci_dev, PCI_COMMAND, command);
1712         }
1713
1714         if (he_dev->membase)
1715                 iounmap(he_dev->membase);
1716 }
1717
1718 static struct he_tpd *
1719 __alloc_tpd(struct he_dev *he_dev)
1720 {
1721 #ifdef USE_TPD_POOL
1722         struct he_tpd *tpd;
1723         dma_addr_t dma_handle;
1724
1725         tpd = pci_pool_alloc(he_dev->tpd_pool, GFP_ATOMIC|GFP_DMA, &dma_handle);
1726         if (tpd == NULL)
1727                 return NULL;
1728
1729         tpd->status = TPD_ADDR(dma_handle);
1730         tpd->reserved = 0;
1731         tpd->iovec[0].addr = 0; tpd->iovec[0].len = 0;
1732         tpd->iovec[1].addr = 0; tpd->iovec[1].len = 0;
1733         tpd->iovec[2].addr = 0; tpd->iovec[2].len = 0;
1734
1735         return tpd;
1736 #else
1737         int i;
1738
1739         for (i = 0; i < CONFIG_NUMTPDS; ++i) {
1740                 ++he_dev->tpd_head;
1741                 if (he_dev->tpd_head > he_dev->tpd_end) {
1742                         he_dev->tpd_head = he_dev->tpd_base;
1743                 }
1744
1745                 if (!he_dev->tpd_head->inuse) {
1746                         he_dev->tpd_head->inuse = 1;
1747                         he_dev->tpd_head->status &= TPD_MASK;
1748                         he_dev->tpd_head->iovec[0].addr = 0; he_dev->tpd_head->iovec[0].len = 0;
1749                         he_dev->tpd_head->iovec[1].addr = 0; he_dev->tpd_head->iovec[1].len = 0;
1750                         he_dev->tpd_head->iovec[2].addr = 0; he_dev->tpd_head->iovec[2].len = 0;
1751                         return he_dev->tpd_head;
1752                 }
1753         }
1754         hprintk("out of tpds -- increase CONFIG_NUMTPDS (%d)\n", CONFIG_NUMTPDS);
1755         return NULL;
1756 #endif
1757 }
1758
1759 #define AAL5_LEN(buf,len)                                               \
1760                         ((((unsigned char *)(buf))[(len)-6] << 8) |     \
1761                                 (((unsigned char *)(buf))[(len)-5]))
1762
1763 /* 2.10.1.2 receive
1764  *
1765  * aal5 packets can optionally return the tcp checksum in the lower
1766  * 16 bits of the crc (RSR0_TCP_CKSUM)
1767  */
1768
1769 #define TCP_CKSUM(buf,len)                                              \
1770                         ((((unsigned char *)(buf))[(len)-2] << 8) |     \
1771                                 (((unsigned char *)(buf))[(len-1)]))
1772
1773 static int
1774 he_service_rbrq(struct he_dev *he_dev, int group)
1775 {
1776         struct he_rbrq *rbrq_tail = (struct he_rbrq *)
1777                                 ((unsigned long)he_dev->rbrq_base |
1778                                         he_dev->hsp->group[group].rbrq_tail);
1779         struct he_rbp *rbp = NULL;
1780         unsigned cid, lastcid = -1;
1781         unsigned buf_len = 0;
1782         struct sk_buff *skb;
1783         struct atm_vcc *vcc = NULL;
1784         struct he_vcc *he_vcc;
1785         struct he_iovec *iov;
1786         int pdus_assembled = 0;
1787         int updated = 0;
1788
1789         read_lock(&vcc_sklist_lock);
1790         while (he_dev->rbrq_head != rbrq_tail) {
1791                 ++updated;
1792
1793                 HPRINTK("%p rbrq%d 0x%x len=%d cid=0x%x %s%s%s%s%s%s\n",
1794                         he_dev->rbrq_head, group,
1795                         RBRQ_ADDR(he_dev->rbrq_head),
1796                         RBRQ_BUFLEN(he_dev->rbrq_head),
1797                         RBRQ_CID(he_dev->rbrq_head),
1798                         RBRQ_CRC_ERR(he_dev->rbrq_head) ? " CRC_ERR" : "",
1799                         RBRQ_LEN_ERR(he_dev->rbrq_head) ? " LEN_ERR" : "",
1800                         RBRQ_END_PDU(he_dev->rbrq_head) ? " END_PDU" : "",
1801                         RBRQ_AAL5_PROT(he_dev->rbrq_head) ? " AAL5_PROT" : "",
1802                         RBRQ_CON_CLOSED(he_dev->rbrq_head) ? " CON_CLOSED" : "",
1803                         RBRQ_HBUF_ERR(he_dev->rbrq_head) ? " HBUF_ERR" : "");
1804
1805 #ifdef USE_RBPS
1806                 if (RBRQ_ADDR(he_dev->rbrq_head) & RBP_SMALLBUF)
1807                         rbp = &he_dev->rbps_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
1808                 else
1809 #endif
1810                         rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
1811
1812                 buf_len = RBRQ_BUFLEN(he_dev->rbrq_head) * 4;
1813                 cid = RBRQ_CID(he_dev->rbrq_head);
1814
1815                 if (cid != lastcid)
1816                         vcc = __find_vcc(he_dev, cid);
1817                 lastcid = cid;
1818
1819                 if (vcc == NULL) {
1820                         hprintk("vcc == NULL  (cid 0x%x)\n", cid);
1821                         if (!RBRQ_HBUF_ERR(he_dev->rbrq_head))
1822                                         rbp->status &= ~RBP_LOANED;
1823
1824                         goto next_rbrq_entry;
1825                 }
1826
1827                 he_vcc = HE_VCC(vcc);
1828                 if (he_vcc == NULL) {
1829                         hprintk("he_vcc == NULL  (cid 0x%x)\n", cid);
1830                         if (!RBRQ_HBUF_ERR(he_dev->rbrq_head))
1831                                         rbp->status &= ~RBP_LOANED;
1832                         goto next_rbrq_entry;
1833                 }
1834
1835                 if (RBRQ_HBUF_ERR(he_dev->rbrq_head)) {
1836                         hprintk("HBUF_ERR!  (cid 0x%x)\n", cid);
1837                                 atomic_inc(&vcc->stats->rx_drop);
1838                         goto return_host_buffers;
1839                 }
1840
1841                 he_vcc->iov_tail->iov_base = RBRQ_ADDR(he_dev->rbrq_head);
1842                 he_vcc->iov_tail->iov_len = buf_len;
1843                 he_vcc->pdu_len += buf_len;
1844                 ++he_vcc->iov_tail;
1845
1846                 if (RBRQ_CON_CLOSED(he_dev->rbrq_head)) {
1847                         lastcid = -1;
1848                         HPRINTK("wake_up rx_waitq  (cid 0x%x)\n", cid);
1849                         wake_up(&he_vcc->rx_waitq);
1850                         goto return_host_buffers;
1851                 }
1852
1853 #ifdef notdef
1854                 if ((he_vcc->iov_tail - he_vcc->iov_head) > HE_MAXIOV) {
1855                         hprintk("iovec full!  cid 0x%x\n", cid);
1856                         goto return_host_buffers;
1857                 }
1858 #endif
1859                 if (!RBRQ_END_PDU(he_dev->rbrq_head))
1860                         goto next_rbrq_entry;
1861
1862                 if (RBRQ_LEN_ERR(he_dev->rbrq_head)
1863                                 || RBRQ_CRC_ERR(he_dev->rbrq_head)) {
1864                         HPRINTK("%s%s (%d.%d)\n",
1865                                 RBRQ_CRC_ERR(he_dev->rbrq_head)
1866                                                         ? "CRC_ERR " : "",
1867                                 RBRQ_LEN_ERR(he_dev->rbrq_head)
1868                                                         ? "LEN_ERR" : "",
1869                                                         vcc->vpi, vcc->vci);
1870                         atomic_inc(&vcc->stats->rx_err);
1871                         goto return_host_buffers;
1872                 }
1873
1874                 skb = atm_alloc_charge(vcc, he_vcc->pdu_len + rx_skb_reserve,
1875                                                         GFP_ATOMIC);
1876                 if (!skb) {
1877                         HPRINTK("charge failed (%d.%d)\n", vcc->vpi, vcc->vci);
1878                         goto return_host_buffers;
1879                 }
1880
1881                 if (rx_skb_reserve > 0)
1882                         skb_reserve(skb, rx_skb_reserve);
1883
1884                 __net_timestamp(skb);
1885
1886                 for (iov = he_vcc->iov_head;
1887                                 iov < he_vcc->iov_tail; ++iov) {
1888 #ifdef USE_RBPS
1889                         if (iov->iov_base & RBP_SMALLBUF)
1890                                 memcpy(skb_put(skb, iov->iov_len),
1891                                         he_dev->rbps_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
1892                         else
1893 #endif
1894                                 memcpy(skb_put(skb, iov->iov_len),
1895                                         he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
1896                 }
1897
1898                 switch (vcc->qos.aal) {
1899                         case ATM_AAL0:
1900                                 /* 2.10.1.5 raw cell receive */
1901                                 skb->len = ATM_AAL0_SDU;
1902                                 skb_set_tail_pointer(skb, skb->len);
1903                                 break;
1904                         case ATM_AAL5:
1905                                 /* 2.10.1.2 aal5 receive */
1906
1907                                 skb->len = AAL5_LEN(skb->data, he_vcc->pdu_len);
1908                                 skb_set_tail_pointer(skb, skb->len);
1909 #ifdef USE_CHECKSUM_HW
1910                                 if (vcc->vpi == 0 && vcc->vci >= ATM_NOT_RSV_VCI) {
1911                                         skb->ip_summed = CHECKSUM_COMPLETE;
1912                                         skb->csum = TCP_CKSUM(skb->data,
1913                                                         he_vcc->pdu_len);
1914                                 }
1915 #endif
1916                                 break;
1917                 }
1918
1919 #ifdef should_never_happen
1920                 if (skb->len > vcc->qos.rxtp.max_sdu)
1921                         hprintk("pdu_len (%d) > vcc->qos.rxtp.max_sdu (%d)!  cid 0x%x\n", skb->len, vcc->qos.rxtp.max_sdu, cid);
1922 #endif
1923
1924 #ifdef notdef
1925                 ATM_SKB(skb)->vcc = vcc;
1926 #endif
1927                 spin_unlock(&he_dev->global_lock);
1928                 vcc->push(vcc, skb);
1929                 spin_lock(&he_dev->global_lock);
1930
1931                 atomic_inc(&vcc->stats->rx);
1932
1933 return_host_buffers:
1934                 ++pdus_assembled;
1935
1936                 for (iov = he_vcc->iov_head;
1937                                 iov < he_vcc->iov_tail; ++iov) {
1938 #ifdef USE_RBPS
1939                         if (iov->iov_base & RBP_SMALLBUF)
1940                                 rbp = &he_dev->rbps_base[RBP_INDEX(iov->iov_base)];
1941                         else
1942 #endif
1943                                 rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
1944
1945                         rbp->status &= ~RBP_LOANED;
1946                 }
1947
1948                 he_vcc->iov_tail = he_vcc->iov_head;
1949                 he_vcc->pdu_len = 0;
1950
1951 next_rbrq_entry:
1952                 he_dev->rbrq_head = (struct he_rbrq *)
1953                                 ((unsigned long) he_dev->rbrq_base |
1954                                         RBRQ_MASK(++he_dev->rbrq_head));
1955
1956         }
1957         read_unlock(&vcc_sklist_lock);
1958
1959         if (updated) {
1960                 if (updated > he_dev->rbrq_peak)
1961                         he_dev->rbrq_peak = updated;
1962
1963                 he_writel(he_dev, RBRQ_MASK(he_dev->rbrq_head),
1964                                                 G0_RBRQ_H + (group * 16));
1965         }
1966
1967         return pdus_assembled;
1968 }
1969
1970 static void
1971 he_service_tbrq(struct he_dev *he_dev, int group)
1972 {
1973         struct he_tbrq *tbrq_tail = (struct he_tbrq *)
1974                                 ((unsigned long)he_dev->tbrq_base |
1975                                         he_dev->hsp->group[group].tbrq_tail);
1976         struct he_tpd *tpd;
1977         int slot, updated = 0;
1978 #ifdef USE_TPD_POOL
1979         struct he_tpd *__tpd;
1980 #endif
1981
1982         /* 2.1.6 transmit buffer return queue */
1983
1984         while (he_dev->tbrq_head != tbrq_tail) {
1985                 ++updated;
1986
1987                 HPRINTK("tbrq%d 0x%x%s%s\n",
1988                         group,
1989                         TBRQ_TPD(he_dev->tbrq_head),
1990                         TBRQ_EOS(he_dev->tbrq_head) ? " EOS" : "",
1991                         TBRQ_MULTIPLE(he_dev->tbrq_head) ? " MULTIPLE" : "");
1992 #ifdef USE_TPD_POOL
1993                 tpd = NULL;
1994                 list_for_each_entry(__tpd, &he_dev->outstanding_tpds, entry) {
1995                         if (TPD_ADDR(__tpd->status) == TBRQ_TPD(he_dev->tbrq_head)) {
1996                                 tpd = __tpd;
1997                                 list_del(&__tpd->entry);
1998                                 break;
1999                         }
2000                 }
2001
2002                 if (tpd == NULL) {
2003                         hprintk("unable to locate tpd for dma buffer %x\n",
2004                                                 TBRQ_TPD(he_dev->tbrq_head));
2005                         goto next_tbrq_entry;
2006                 }
2007 #else
2008                 tpd = &he_dev->tpd_base[ TPD_INDEX(TBRQ_TPD(he_dev->tbrq_head)) ];
2009 #endif
2010
2011                 if (TBRQ_EOS(he_dev->tbrq_head)) {
2012                         HPRINTK("wake_up(tx_waitq) cid 0x%x\n",
2013                                 he_mkcid(he_dev, tpd->vcc->vpi, tpd->vcc->vci));
2014                         if (tpd->vcc)
2015                                 wake_up(&HE_VCC(tpd->vcc)->tx_waitq);
2016
2017                         goto next_tbrq_entry;
2018                 }
2019
2020                 for (slot = 0; slot < TPD_MAXIOV; ++slot) {
2021                         if (tpd->iovec[slot].addr)
2022                                 pci_unmap_single(he_dev->pci_dev,
2023                                         tpd->iovec[slot].addr,
2024                                         tpd->iovec[slot].len & TPD_LEN_MASK,
2025                                                         PCI_DMA_TODEVICE);
2026                         if (tpd->iovec[slot].len & TPD_LST)
2027                                 break;
2028
2029                 }
2030
2031                 if (tpd->skb) { /* && !TBRQ_MULTIPLE(he_dev->tbrq_head) */
2032                         if (tpd->vcc && tpd->vcc->pop)
2033                                 tpd->vcc->pop(tpd->vcc, tpd->skb);
2034                         else
2035                                 dev_kfree_skb_any(tpd->skb);
2036                 }
2037
2038 next_tbrq_entry:
2039 #ifdef USE_TPD_POOL
2040                 if (tpd)
2041                         pci_pool_free(he_dev->tpd_pool, tpd, TPD_ADDR(tpd->status));
2042 #else
2043                 tpd->inuse = 0;
2044 #endif
2045                 he_dev->tbrq_head = (struct he_tbrq *)
2046                                 ((unsigned long) he_dev->tbrq_base |
2047                                         TBRQ_MASK(++he_dev->tbrq_head));
2048         }
2049
2050         if (updated) {
2051                 if (updated > he_dev->tbrq_peak)
2052                         he_dev->tbrq_peak = updated;
2053
2054                 he_writel(he_dev, TBRQ_MASK(he_dev->tbrq_head),
2055                                                 G0_TBRQ_H + (group * 16));
2056         }
2057 }
2058
2059
2060 static void
2061 he_service_rbpl(struct he_dev *he_dev, int group)
2062 {
2063         struct he_rbp *newtail;
2064         struct he_rbp *rbpl_head;
2065         int moved = 0;
2066
2067         rbpl_head = (struct he_rbp *) ((unsigned long)he_dev->rbpl_base |
2068                                         RBPL_MASK(he_readl(he_dev, G0_RBPL_S)));
2069
2070         for (;;) {
2071                 newtail = (struct he_rbp *) ((unsigned long)he_dev->rbpl_base |
2072                                                 RBPL_MASK(he_dev->rbpl_tail+1));
2073
2074                 /* table 3.42 -- rbpl_tail should never be set to rbpl_head */
2075                 if ((newtail == rbpl_head) || (newtail->status & RBP_LOANED))
2076                         break;
2077
2078                 newtail->status |= RBP_LOANED;
2079                 he_dev->rbpl_tail = newtail;
2080                 ++moved;
2081         }
2082
2083         if (moved)
2084                 he_writel(he_dev, RBPL_MASK(he_dev->rbpl_tail), G0_RBPL_T);
2085 }
2086
2087 #ifdef USE_RBPS
2088 static void
2089 he_service_rbps(struct he_dev *he_dev, int group)
2090 {
2091         struct he_rbp *newtail;
2092         struct he_rbp *rbps_head;
2093         int moved = 0;
2094
2095         rbps_head = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
2096                                         RBPS_MASK(he_readl(he_dev, G0_RBPS_S)));
2097
2098         for (;;) {
2099                 newtail = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
2100                                                 RBPS_MASK(he_dev->rbps_tail+1));
2101
2102                 /* table 3.42 -- rbps_tail should never be set to rbps_head */
2103                 if ((newtail == rbps_head) || (newtail->status & RBP_LOANED))
2104                         break;
2105
2106                 newtail->status |= RBP_LOANED;
2107                 he_dev->rbps_tail = newtail;
2108                 ++moved;
2109         }
2110
2111         if (moved)
2112                 he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail), G0_RBPS_T);
2113 }
2114 #endif /* USE_RBPS */
2115
2116 static void
2117 he_tasklet(unsigned long data)
2118 {
2119         unsigned long flags;
2120         struct he_dev *he_dev = (struct he_dev *) data;
2121         int group, type;
2122         int updated = 0;
2123
2124         HPRINTK("tasklet (0x%lx)\n", data);
2125 #ifdef USE_TASKLET
2126         spin_lock_irqsave(&he_dev->global_lock, flags);
2127 #endif
2128
2129         while (he_dev->irq_head != he_dev->irq_tail) {
2130                 ++updated;
2131
2132                 type = ITYPE_TYPE(he_dev->irq_head->isw);
2133                 group = ITYPE_GROUP(he_dev->irq_head->isw);
2134
2135                 switch (type) {
2136                         case ITYPE_RBRQ_THRESH:
2137                                 HPRINTK("rbrq%d threshold\n", group);
2138                                 /* fall through */
2139                         case ITYPE_RBRQ_TIMER:
2140                                 if (he_service_rbrq(he_dev, group)) {
2141                                         he_service_rbpl(he_dev, group);
2142 #ifdef USE_RBPS
2143                                         he_service_rbps(he_dev, group);
2144 #endif /* USE_RBPS */
2145                                 }
2146                                 break;
2147                         case ITYPE_TBRQ_THRESH:
2148                                 HPRINTK("tbrq%d threshold\n", group);
2149                                 /* fall through */
2150                         case ITYPE_TPD_COMPLETE:
2151                                 he_service_tbrq(he_dev, group);
2152                                 break;
2153                         case ITYPE_RBPL_THRESH:
2154                                 he_service_rbpl(he_dev, group);
2155                                 break;
2156                         case ITYPE_RBPS_THRESH:
2157 #ifdef USE_RBPS
2158                                 he_service_rbps(he_dev, group);
2159 #endif /* USE_RBPS */
2160                                 break;
2161                         case ITYPE_PHY:
2162                                 HPRINTK("phy interrupt\n");
2163 #ifdef CONFIG_ATM_HE_USE_SUNI
2164                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2165                                 if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->interrupt)
2166                                         he_dev->atm_dev->phy->interrupt(he_dev->atm_dev);
2167                                 spin_lock_irqsave(&he_dev->global_lock, flags);
2168 #endif
2169                                 break;
2170                         case ITYPE_OTHER:
2171                                 switch (type|group) {
2172                                         case ITYPE_PARITY:
2173                                                 hprintk("parity error\n");
2174                                                 break;
2175                                         case ITYPE_ABORT:
2176                                                 hprintk("abort 0x%x\n", he_readl(he_dev, ABORT_ADDR));
2177                                                 break;
2178                                 }
2179                                 break;
2180                         case ITYPE_TYPE(ITYPE_INVALID):
2181                                 /* see 8.1.1 -- check all queues */
2182
2183                                 HPRINTK("isw not updated 0x%x\n", he_dev->irq_head->isw);
2184
2185                                 he_service_rbrq(he_dev, 0);
2186                                 he_service_rbpl(he_dev, 0);
2187 #ifdef USE_RBPS
2188                                 he_service_rbps(he_dev, 0);
2189 #endif /* USE_RBPS */
2190                                 he_service_tbrq(he_dev, 0);
2191                                 break;
2192                         default:
2193                                 hprintk("bad isw 0x%x?\n", he_dev->irq_head->isw);
2194                 }
2195
2196                 he_dev->irq_head->isw = ITYPE_INVALID;
2197
2198                 he_dev->irq_head = (struct he_irq *) NEXT_ENTRY(he_dev->irq_base, he_dev->irq_head, IRQ_MASK);
2199         }
2200
2201         if (updated) {
2202                 if (updated > he_dev->irq_peak)
2203                         he_dev->irq_peak = updated;
2204
2205                 he_writel(he_dev,
2206                         IRQ_SIZE(CONFIG_IRQ_SIZE) |
2207                         IRQ_THRESH(CONFIG_IRQ_THRESH) |
2208                         IRQ_TAIL(he_dev->irq_tail), IRQ0_HEAD);
2209                 (void) he_readl(he_dev, INT_FIFO); /* 8.1.2 controller errata; flush posted writes */
2210         }
2211 #ifdef USE_TASKLET
2212         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2213 #endif
2214 }
2215
2216 static irqreturn_t
2217 he_irq_handler(int irq, void *dev_id)
2218 {
2219         unsigned long flags;
2220         struct he_dev *he_dev = (struct he_dev * )dev_id;
2221         int handled = 0;
2222
2223         if (he_dev == NULL)
2224                 return IRQ_NONE;
2225
2226         spin_lock_irqsave(&he_dev->global_lock, flags);
2227
2228         he_dev->irq_tail = (struct he_irq *) (((unsigned long)he_dev->irq_base) |
2229                                                 (*he_dev->irq_tailoffset << 2));
2230
2231         if (he_dev->irq_tail == he_dev->irq_head) {
2232                 HPRINTK("tailoffset not updated?\n");
2233                 he_dev->irq_tail = (struct he_irq *) ((unsigned long)he_dev->irq_base |
2234                         ((he_readl(he_dev, IRQ0_BASE) & IRQ_MASK) << 2));
2235                 (void) he_readl(he_dev, INT_FIFO);      /* 8.1.2 controller errata */
2236         }
2237
2238 #ifdef DEBUG
2239         if (he_dev->irq_head == he_dev->irq_tail /* && !IRQ_PENDING */)
2240                 hprintk("spurious (or shared) interrupt?\n");
2241 #endif
2242
2243         if (he_dev->irq_head != he_dev->irq_tail) {
2244                 handled = 1;
2245 #ifdef USE_TASKLET
2246                 tasklet_schedule(&he_dev->tasklet);
2247 #else
2248                 he_tasklet((unsigned long) he_dev);
2249 #endif
2250                 he_writel(he_dev, INT_CLEAR_A, INT_FIFO);       /* clear interrupt */
2251                 (void) he_readl(he_dev, INT_FIFO);              /* flush posted writes */
2252         }
2253         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2254         return IRQ_RETVAL(handled);
2255
2256 }
2257
2258 static __inline__ void
2259 __enqueue_tpd(struct he_dev *he_dev, struct he_tpd *tpd, unsigned cid)
2260 {
2261         struct he_tpdrq *new_tail;
2262
2263         HPRINTK("tpdrq %p cid 0x%x -> tpdrq_tail %p\n",
2264                                         tpd, cid, he_dev->tpdrq_tail);
2265
2266         /* new_tail = he_dev->tpdrq_tail; */
2267         new_tail = (struct he_tpdrq *) ((unsigned long) he_dev->tpdrq_base |
2268                                         TPDRQ_MASK(he_dev->tpdrq_tail+1));
2269
2270         /*
2271          * check to see if we are about to set the tail == head
2272          * if true, update the head pointer from the adapter
2273          * to see if this is really the case (reading the queue
2274          * head for every enqueue would be unnecessarily slow)
2275          */
2276
2277         if (new_tail == he_dev->tpdrq_head) {
2278                 he_dev->tpdrq_head = (struct he_tpdrq *)
2279                         (((unsigned long)he_dev->tpdrq_base) |
2280                                 TPDRQ_MASK(he_readl(he_dev, TPDRQ_B_H)));
2281
2282                 if (new_tail == he_dev->tpdrq_head) {
2283                         int slot;
2284
2285                         hprintk("tpdrq full (cid 0x%x)\n", cid);
2286                         /*
2287                          * FIXME
2288                          * push tpd onto a transmit backlog queue
2289                          * after service_tbrq, service the backlog
2290                          * for now, we just drop the pdu
2291                          */
2292                         for (slot = 0; slot < TPD_MAXIOV; ++slot) {
2293                                 if (tpd->iovec[slot].addr)
2294                                         pci_unmap_single(he_dev->pci_dev,
2295                                                 tpd->iovec[slot].addr,
2296                                                 tpd->iovec[slot].len & TPD_LEN_MASK,
2297                                                                 PCI_DMA_TODEVICE);
2298                         }
2299                         if (tpd->skb) {
2300                                 if (tpd->vcc->pop)
2301                                         tpd->vcc->pop(tpd->vcc, tpd->skb);
2302                                 else
2303                                         dev_kfree_skb_any(tpd->skb);
2304                                 atomic_inc(&tpd->vcc->stats->tx_err);
2305                         }
2306 #ifdef USE_TPD_POOL
2307                         pci_pool_free(he_dev->tpd_pool, tpd, TPD_ADDR(tpd->status));
2308 #else
2309                         tpd->inuse = 0;
2310 #endif
2311                         return;
2312                 }
2313         }
2314
2315         /* 2.1.5 transmit packet descriptor ready queue */
2316 #ifdef USE_TPD_POOL
2317         list_add_tail(&tpd->entry, &he_dev->outstanding_tpds);
2318         he_dev->tpdrq_tail->tpd = TPD_ADDR(tpd->status);
2319 #else
2320         he_dev->tpdrq_tail->tpd = he_dev->tpd_base_phys +
2321                                 (TPD_INDEX(tpd->status) * sizeof(struct he_tpd));
2322 #endif
2323         he_dev->tpdrq_tail->cid = cid;
2324         wmb();
2325
2326         he_dev->tpdrq_tail = new_tail;
2327
2328         he_writel(he_dev, TPDRQ_MASK(he_dev->tpdrq_tail), TPDRQ_T);
2329         (void) he_readl(he_dev, TPDRQ_T);               /* flush posted writes */
2330 }
2331
2332 static int
2333 he_open(struct atm_vcc *vcc)
2334 {
2335         unsigned long flags;
2336         struct he_dev *he_dev = HE_DEV(vcc->dev);
2337         struct he_vcc *he_vcc;
2338         int err = 0;
2339         unsigned cid, rsr0, rsr1, rsr4, tsr0, tsr0_aal, tsr4, period, reg, clock;
2340         short vpi = vcc->vpi;
2341         int vci = vcc->vci;
2342
2343         if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
2344                 return 0;
2345
2346         HPRINTK("open vcc %p %d.%d\n", vcc, vpi, vci);
2347
2348         set_bit(ATM_VF_ADDR, &vcc->flags);
2349
2350         cid = he_mkcid(he_dev, vpi, vci);
2351
2352         he_vcc = kmalloc(sizeof(struct he_vcc), GFP_ATOMIC);
2353         if (he_vcc == NULL) {
2354                 hprintk("unable to allocate he_vcc during open\n");
2355                 return -ENOMEM;
2356         }
2357
2358         he_vcc->iov_tail = he_vcc->iov_head;
2359         he_vcc->pdu_len = 0;
2360         he_vcc->rc_index = -1;
2361
2362         init_waitqueue_head(&he_vcc->rx_waitq);
2363         init_waitqueue_head(&he_vcc->tx_waitq);
2364
2365         vcc->dev_data = he_vcc;
2366
2367         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2368                 int pcr_goal;
2369
2370                 pcr_goal = atm_pcr_goal(&vcc->qos.txtp);
2371                 if (pcr_goal == 0)
2372                         pcr_goal = he_dev->atm_dev->link_rate;
2373                 if (pcr_goal < 0)       /* means round down, technically */
2374                         pcr_goal = -pcr_goal;
2375
2376                 HPRINTK("open tx cid 0x%x pcr_goal %d\n", cid, pcr_goal);
2377
2378                 switch (vcc->qos.aal) {
2379                         case ATM_AAL5:
2380                                 tsr0_aal = TSR0_AAL5;
2381                                 tsr4 = TSR4_AAL5;
2382                                 break;
2383                         case ATM_AAL0:
2384                                 tsr0_aal = TSR0_AAL0_SDU;
2385                                 tsr4 = TSR4_AAL0_SDU;
2386                                 break;
2387                         default:
2388                                 err = -EINVAL;
2389                                 goto open_failed;
2390                 }
2391
2392                 spin_lock_irqsave(&he_dev->global_lock, flags);
2393                 tsr0 = he_readl_tsr0(he_dev, cid);
2394                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2395
2396                 if (TSR0_CONN_STATE(tsr0) != 0) {
2397                         hprintk("cid 0x%x not idle (tsr0 = 0x%x)\n", cid, tsr0);
2398                         err = -EBUSY;
2399                         goto open_failed;
2400                 }
2401
2402                 switch (vcc->qos.txtp.traffic_class) {
2403                         case ATM_UBR:
2404                                 /* 2.3.3.1 open connection ubr */
2405
2406                                 tsr0 = TSR0_UBR | TSR0_GROUP(0) | tsr0_aal |
2407                                         TSR0_USE_WMIN | TSR0_UPDATE_GER;
2408                                 break;
2409
2410                         case ATM_CBR:
2411                                 /* 2.3.3.2 open connection cbr */
2412
2413                                 /* 8.2.3 cbr scheduler wrap problem -- limit to 90% total link rate */
2414                                 if ((he_dev->total_bw + pcr_goal)
2415                                         > (he_dev->atm_dev->link_rate * 9 / 10))
2416                                 {
2417                                         err = -EBUSY;
2418                                         goto open_failed;
2419                                 }
2420
2421                                 spin_lock_irqsave(&he_dev->global_lock, flags);                 /* also protects he_dev->cs_stper[] */
2422
2423                                 /* find an unused cs_stper register */
2424                                 for (reg = 0; reg < HE_NUM_CS_STPER; ++reg)
2425                                         if (he_dev->cs_stper[reg].inuse == 0 ||
2426                                             he_dev->cs_stper[reg].pcr == pcr_goal)
2427                                                         break;
2428
2429                                 if (reg == HE_NUM_CS_STPER) {
2430                                         err = -EBUSY;
2431                                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2432                                         goto open_failed;
2433                                 }
2434
2435                                 he_dev->total_bw += pcr_goal;
2436
2437                                 he_vcc->rc_index = reg;
2438                                 ++he_dev->cs_stper[reg].inuse;
2439                                 he_dev->cs_stper[reg].pcr = pcr_goal;
2440
2441                                 clock = he_is622(he_dev) ? 66667000 : 50000000;
2442                                 period = clock / pcr_goal;
2443
2444                                 HPRINTK("rc_index = %d period = %d\n",
2445                                                                 reg, period);
2446
2447                                 he_writel_mbox(he_dev, rate_to_atmf(period/2),
2448                                                         CS_STPER0 + reg);
2449                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2450
2451                                 tsr0 = TSR0_CBR | TSR0_GROUP(0) | tsr0_aal |
2452                                                         TSR0_RC_INDEX(reg);
2453
2454                                 break;
2455                         default:
2456                                 err = -EINVAL;
2457                                 goto open_failed;
2458                 }
2459
2460                 spin_lock_irqsave(&he_dev->global_lock, flags);
2461
2462                 he_writel_tsr0(he_dev, tsr0, cid);
2463                 he_writel_tsr4(he_dev, tsr4 | 1, cid);
2464                 he_writel_tsr1(he_dev, TSR1_MCR(rate_to_atmf(0)) |
2465                                         TSR1_PCR(rate_to_atmf(pcr_goal)), cid);
2466                 he_writel_tsr2(he_dev, TSR2_ACR(rate_to_atmf(pcr_goal)), cid);
2467                 he_writel_tsr9(he_dev, TSR9_OPEN_CONN, cid);
2468
2469                 he_writel_tsr3(he_dev, 0x0, cid);
2470                 he_writel_tsr5(he_dev, 0x0, cid);
2471                 he_writel_tsr6(he_dev, 0x0, cid);
2472                 he_writel_tsr7(he_dev, 0x0, cid);
2473                 he_writel_tsr8(he_dev, 0x0, cid);
2474                 he_writel_tsr10(he_dev, 0x0, cid);
2475                 he_writel_tsr11(he_dev, 0x0, cid);
2476                 he_writel_tsr12(he_dev, 0x0, cid);
2477                 he_writel_tsr13(he_dev, 0x0, cid);
2478                 he_writel_tsr14(he_dev, 0x0, cid);
2479                 (void) he_readl_tsr0(he_dev, cid);              /* flush posted writes */
2480                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2481         }
2482
2483         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2484                 unsigned aal;
2485
2486                 HPRINTK("open rx cid 0x%x (rx_waitq %p)\n", cid,
2487                                                 &HE_VCC(vcc)->rx_waitq);
2488
2489                 switch (vcc->qos.aal) {
2490                         case ATM_AAL5:
2491                                 aal = RSR0_AAL5;
2492                                 break;
2493                         case ATM_AAL0:
2494                                 aal = RSR0_RAWCELL;
2495                                 break;
2496                         default:
2497                                 err = -EINVAL;
2498                                 goto open_failed;
2499                 }
2500
2501                 spin_lock_irqsave(&he_dev->global_lock, flags);
2502
2503                 rsr0 = he_readl_rsr0(he_dev, cid);
2504                 if (rsr0 & RSR0_OPEN_CONN) {
2505                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2506
2507                         hprintk("cid 0x%x not idle (rsr0 = 0x%x)\n", cid, rsr0);
2508                         err = -EBUSY;
2509                         goto open_failed;
2510                 }
2511
2512 #ifdef USE_RBPS
2513                 rsr1 = RSR1_GROUP(0);
2514                 rsr4 = RSR4_GROUP(0);
2515 #else /* !USE_RBPS */
2516                 rsr1 = RSR1_GROUP(0)|RSR1_RBPL_ONLY;
2517                 rsr4 = RSR4_GROUP(0)|RSR4_RBPL_ONLY;
2518 #endif /* USE_RBPS */
2519                 rsr0 = vcc->qos.rxtp.traffic_class == ATM_UBR ?
2520                                 (RSR0_EPD_ENABLE|RSR0_PPD_ENABLE) : 0;
2521
2522 #ifdef USE_CHECKSUM_HW
2523                 if (vpi == 0 && vci >= ATM_NOT_RSV_VCI)
2524                         rsr0 |= RSR0_TCP_CKSUM;
2525 #endif
2526
2527                 he_writel_rsr4(he_dev, rsr4, cid);
2528                 he_writel_rsr1(he_dev, rsr1, cid);
2529                 /* 5.1.11 last parameter initialized should be
2530                           the open/closed indication in rsr0 */
2531                 he_writel_rsr0(he_dev,
2532                         rsr0 | RSR0_START_PDU | RSR0_OPEN_CONN | aal, cid);
2533                 (void) he_readl_rsr0(he_dev, cid);              /* flush posted writes */
2534
2535                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2536         }
2537
2538 open_failed:
2539
2540         if (err) {
2541                 kfree(he_vcc);
2542                 clear_bit(ATM_VF_ADDR, &vcc->flags);
2543         }
2544         else
2545                 set_bit(ATM_VF_READY, &vcc->flags);
2546
2547         return err;
2548 }
2549
2550 static void
2551 he_close(struct atm_vcc *vcc)
2552 {
2553         unsigned long flags;
2554         DECLARE_WAITQUEUE(wait, current);
2555         struct he_dev *he_dev = HE_DEV(vcc->dev);
2556         struct he_tpd *tpd;
2557         unsigned cid;
2558         struct he_vcc *he_vcc = HE_VCC(vcc);
2559 #define MAX_RETRY 30
2560         int retry = 0, sleep = 1, tx_inuse;
2561
2562         HPRINTK("close vcc %p %d.%d\n", vcc, vcc->vpi, vcc->vci);
2563
2564         clear_bit(ATM_VF_READY, &vcc->flags);
2565         cid = he_mkcid(he_dev, vcc->vpi, vcc->vci);
2566
2567         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2568                 int timeout;
2569
2570                 HPRINTK("close rx cid 0x%x\n", cid);
2571
2572                 /* 2.7.2.2 close receive operation */
2573
2574                 /* wait for previous close (if any) to finish */
2575
2576                 spin_lock_irqsave(&he_dev->global_lock, flags);
2577                 while (he_readl(he_dev, RCC_STAT) & RCC_BUSY) {
2578                         HPRINTK("close cid 0x%x RCC_BUSY\n", cid);
2579                         udelay(250);
2580                 }
2581
2582                 set_current_state(TASK_UNINTERRUPTIBLE);
2583                 add_wait_queue(&he_vcc->rx_waitq, &wait);
2584
2585                 he_writel_rsr0(he_dev, RSR0_CLOSE_CONN, cid);
2586                 (void) he_readl_rsr0(he_dev, cid);              /* flush posted writes */
2587                 he_writel_mbox(he_dev, cid, RXCON_CLOSE);
2588                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2589
2590                 timeout = schedule_timeout(30*HZ);
2591
2592                 remove_wait_queue(&he_vcc->rx_waitq, &wait);
2593                 set_current_state(TASK_RUNNING);
2594
2595                 if (timeout == 0)
2596                         hprintk("close rx timeout cid 0x%x\n", cid);
2597
2598                 HPRINTK("close rx cid 0x%x complete\n", cid);
2599
2600         }
2601
2602         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2603                 volatile unsigned tsr4, tsr0;
2604                 int timeout;
2605
2606                 HPRINTK("close tx cid 0x%x\n", cid);
2607
2608                 /* 2.1.2
2609                  *
2610                  * ... the host must first stop queueing packets to the TPDRQ
2611                  * on the connection to be closed, then wait for all outstanding
2612                  * packets to be transmitted and their buffers returned to the
2613                  * TBRQ. When the last packet on the connection arrives in the
2614                  * TBRQ, the host issues the close command to the adapter.
2615                  */
2616
2617                 while (((tx_inuse = atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) > 0) &&
2618                        (retry < MAX_RETRY)) {
2619                         msleep(sleep);
2620                         if (sleep < 250)
2621                                 sleep = sleep * 2;
2622
2623                         ++retry;
2624                 }
2625
2626                 if (tx_inuse)
2627                         hprintk("close tx cid 0x%x tx_inuse = %d\n", cid, tx_inuse);
2628
2629                 /* 2.3.1.1 generic close operations with flush */
2630
2631                 spin_lock_irqsave(&he_dev->global_lock, flags);
2632                 he_writel_tsr4_upper(he_dev, TSR4_FLUSH_CONN, cid);
2633                                         /* also clears TSR4_SESSION_ENDED */
2634
2635                 switch (vcc->qos.txtp.traffic_class) {
2636                         case ATM_UBR:
2637                                 he_writel_tsr1(he_dev,
2638                                         TSR1_MCR(rate_to_atmf(200000))
2639                                         | TSR1_PCR(0), cid);
2640                                 break;
2641                         case ATM_CBR:
2642                                 he_writel_tsr14_upper(he_dev, TSR14_DELETE, cid);
2643                                 break;
2644                 }
2645                 (void) he_readl_tsr4(he_dev, cid);              /* flush posted writes */
2646
2647                 tpd = __alloc_tpd(he_dev);
2648                 if (tpd == NULL) {
2649                         hprintk("close tx he_alloc_tpd failed cid 0x%x\n", cid);
2650                         goto close_tx_incomplete;
2651                 }
2652                 tpd->status |= TPD_EOS | TPD_INT;
2653                 tpd->skb = NULL;
2654                 tpd->vcc = vcc;
2655                 wmb();
2656
2657                 set_current_state(TASK_UNINTERRUPTIBLE);
2658                 add_wait_queue(&he_vcc->tx_waitq, &wait);
2659                 __enqueue_tpd(he_dev, tpd, cid);
2660                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2661
2662                 timeout = schedule_timeout(30*HZ);
2663
2664                 remove_wait_queue(&he_vcc->tx_waitq, &wait);
2665                 set_current_state(TASK_RUNNING);
2666
2667                 spin_lock_irqsave(&he_dev->global_lock, flags);
2668
2669                 if (timeout == 0) {
2670                         hprintk("close tx timeout cid 0x%x\n", cid);
2671                         goto close_tx_incomplete;
2672                 }
2673
2674                 while (!((tsr4 = he_readl_tsr4(he_dev, cid)) & TSR4_SESSION_ENDED)) {
2675                         HPRINTK("close tx cid 0x%x !TSR4_SESSION_ENDED (tsr4 = 0x%x)\n", cid, tsr4);
2676                         udelay(250);
2677                 }
2678
2679                 while (TSR0_CONN_STATE(tsr0 = he_readl_tsr0(he_dev, cid)) != 0) {
2680                         HPRINTK("close tx cid 0x%x TSR0_CONN_STATE != 0 (tsr0 = 0x%x)\n", cid, tsr0);
2681                         udelay(250);
2682                 }
2683
2684 close_tx_incomplete:
2685
2686                 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
2687                         int reg = he_vcc->rc_index;
2688
2689                         HPRINTK("cs_stper reg = %d\n", reg);
2690
2691                         if (he_dev->cs_stper[reg].inuse == 0)
2692                                 hprintk("cs_stper[%d].inuse = 0!\n", reg);
2693                         else
2694                                 --he_dev->cs_stper[reg].inuse;
2695
2696                         he_dev->total_bw -= he_dev->cs_stper[reg].pcr;
2697                 }
2698                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2699
2700                 HPRINTK("close tx cid 0x%x complete\n", cid);
2701         }
2702
2703         kfree(he_vcc);
2704
2705         clear_bit(ATM_VF_ADDR, &vcc->flags);
2706 }
2707
2708 static int
2709 he_send(struct atm_vcc *vcc, struct sk_buff *skb)
2710 {
2711         unsigned long flags;
2712         struct he_dev *he_dev = HE_DEV(vcc->dev);
2713         unsigned cid = he_mkcid(he_dev, vcc->vpi, vcc->vci);
2714         struct he_tpd *tpd;
2715 #ifdef USE_SCATTERGATHER
2716         int i, slot = 0;
2717 #endif
2718
2719 #define HE_TPD_BUFSIZE 0xffff
2720
2721         HPRINTK("send %d.%d\n", vcc->vpi, vcc->vci);
2722
2723         if ((skb->len > HE_TPD_BUFSIZE) ||
2724             ((vcc->qos.aal == ATM_AAL0) && (skb->len != ATM_AAL0_SDU))) {
2725                 hprintk("buffer too large (or small) -- %d bytes\n", skb->len );
2726                 if (vcc->pop)
2727                         vcc->pop(vcc, skb);
2728                 else
2729                         dev_kfree_skb_any(skb);
2730                 atomic_inc(&vcc->stats->tx_err);
2731                 return -EINVAL;
2732         }
2733
2734 #ifndef USE_SCATTERGATHER
2735         if (skb_shinfo(skb)->nr_frags) {
2736                 hprintk("no scatter/gather support\n");
2737                 if (vcc->pop)
2738                         vcc->pop(vcc, skb);
2739                 else
2740                         dev_kfree_skb_any(skb);
2741                 atomic_inc(&vcc->stats->tx_err);
2742                 return -EINVAL;
2743         }
2744 #endif
2745         spin_lock_irqsave(&he_dev->global_lock, flags);
2746
2747         tpd = __alloc_tpd(he_dev);
2748         if (tpd == NULL) {
2749                 if (vcc->pop)
2750                         vcc->pop(vcc, skb);
2751                 else
2752                         dev_kfree_skb_any(skb);
2753                 atomic_inc(&vcc->stats->tx_err);
2754                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2755                 return -ENOMEM;
2756         }
2757
2758         if (vcc->qos.aal == ATM_AAL5)
2759                 tpd->status |= TPD_CELLTYPE(TPD_USERCELL);
2760         else {
2761                 char *pti_clp = (void *) (skb->data + 3);
2762                 int clp, pti;
2763
2764                 pti = (*pti_clp & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
2765                 clp = (*pti_clp & ATM_HDR_CLP);
2766                 tpd->status |= TPD_CELLTYPE(pti);
2767                 if (clp)
2768                         tpd->status |= TPD_CLP;
2769
2770                 skb_pull(skb, ATM_AAL0_SDU - ATM_CELL_PAYLOAD);
2771         }
2772
2773 #ifdef USE_SCATTERGATHER
2774         tpd->iovec[slot].addr = pci_map_single(he_dev->pci_dev, skb->data,
2775                                 skb->len - skb->data_len, PCI_DMA_TODEVICE);
2776         tpd->iovec[slot].len = skb->len - skb->data_len;
2777         ++slot;
2778
2779         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2780                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2781
2782                 if (slot == TPD_MAXIOV) {       /* queue tpd; start new tpd */
2783                         tpd->vcc = vcc;
2784                         tpd->skb = NULL;        /* not the last fragment
2785                                                    so dont ->push() yet */
2786                         wmb();
2787
2788                         __enqueue_tpd(he_dev, tpd, cid);
2789                         tpd = __alloc_tpd(he_dev);
2790                         if (tpd == NULL) {
2791                                 if (vcc->pop)
2792                                         vcc->pop(vcc, skb);
2793                                 else
2794                                         dev_kfree_skb_any(skb);
2795                                 atomic_inc(&vcc->stats->tx_err);
2796                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2797                                 return -ENOMEM;
2798                         }
2799                         tpd->status |= TPD_USERCELL;
2800                         slot = 0;
2801                 }
2802
2803                 tpd->iovec[slot].addr = pci_map_single(he_dev->pci_dev,
2804                         (void *) page_address(frag->page) + frag->page_offset,
2805                                 frag->size, PCI_DMA_TODEVICE);
2806                 tpd->iovec[slot].len = frag->size;
2807                 ++slot;
2808
2809         }
2810
2811         tpd->iovec[slot - 1].len |= TPD_LST;
2812 #else
2813         tpd->address0 = pci_map_single(he_dev->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2814         tpd->length0 = skb->len | TPD_LST;
2815 #endif
2816         tpd->status |= TPD_INT;
2817
2818         tpd->vcc = vcc;
2819         tpd->skb = skb;
2820         wmb();
2821         ATM_SKB(skb)->vcc = vcc;
2822
2823         __enqueue_tpd(he_dev, tpd, cid);
2824         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2825
2826         atomic_inc(&vcc->stats->tx);
2827
2828         return 0;
2829 }
2830
2831 static int
2832 he_ioctl(struct atm_dev *atm_dev, unsigned int cmd, void __user *arg)
2833 {
2834         unsigned long flags;
2835         struct he_dev *he_dev = HE_DEV(atm_dev);
2836         struct he_ioctl_reg reg;
2837         int err = 0;
2838
2839         switch (cmd) {
2840                 case HE_GET_REG:
2841                         if (!capable(CAP_NET_ADMIN))
2842                                 return -EPERM;
2843
2844                         if (copy_from_user(&reg, arg,
2845                                            sizeof(struct he_ioctl_reg)))
2846                                 return -EFAULT;
2847
2848                         spin_lock_irqsave(&he_dev->global_lock, flags);
2849                         switch (reg.type) {
2850                                 case HE_REGTYPE_PCI:
2851                                         reg.val = he_readl(he_dev, reg.addr);
2852                                         break;
2853                                 case HE_REGTYPE_RCM:
2854                                         reg.val =
2855                                                 he_readl_rcm(he_dev, reg.addr);
2856                                         break;
2857                                 case HE_REGTYPE_TCM:
2858                                         reg.val =
2859                                                 he_readl_tcm(he_dev, reg.addr);
2860                                         break;
2861                                 case HE_REGTYPE_MBOX:
2862                                         reg.val =
2863                                                 he_readl_mbox(he_dev, reg.addr);
2864                                         break;
2865                                 default:
2866                                         err = -EINVAL;
2867                                         break;
2868                         }
2869                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2870                         if (err == 0)
2871                                 if (copy_to_user(arg, &reg,
2872                                                         sizeof(struct he_ioctl_reg)))
2873                                         return -EFAULT;
2874                         break;
2875                 default:
2876 #ifdef CONFIG_ATM_HE_USE_SUNI
2877                         if (atm_dev->phy && atm_dev->phy->ioctl)
2878                                 err = atm_dev->phy->ioctl(atm_dev, cmd, arg);
2879 #else /* CONFIG_ATM_HE_USE_SUNI */
2880                         err = -EINVAL;
2881 #endif /* CONFIG_ATM_HE_USE_SUNI */
2882                         break;
2883         }
2884
2885         return err;
2886 }
2887
2888 static void
2889 he_phy_put(struct atm_dev *atm_dev, unsigned char val, unsigned long addr)
2890 {
2891         unsigned long flags;
2892         struct he_dev *he_dev = HE_DEV(atm_dev);
2893
2894         HPRINTK("phy_put(val 0x%x, addr 0x%lx)\n", val, addr);
2895
2896         spin_lock_irqsave(&he_dev->global_lock, flags);
2897         he_writel(he_dev, val, FRAMER + (addr*4));
2898         (void) he_readl(he_dev, FRAMER + (addr*4));             /* flush posted writes */
2899         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2900 }
2901
2902
2903 static unsigned char
2904 he_phy_get(struct atm_dev *atm_dev, unsigned long addr)
2905 {
2906         unsigned long flags;
2907         struct he_dev *he_dev = HE_DEV(atm_dev);
2908         unsigned reg;
2909
2910         spin_lock_irqsave(&he_dev->global_lock, flags);
2911         reg = he_readl(he_dev, FRAMER + (addr*4));
2912         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2913
2914         HPRINTK("phy_get(addr 0x%lx) =0x%x\n", addr, reg);
2915         return reg;
2916 }
2917
2918 static int
2919 he_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2920 {
2921         unsigned long flags;
2922         struct he_dev *he_dev = HE_DEV(dev);
2923         int left, i;
2924 #ifdef notdef
2925         struct he_rbrq *rbrq_tail;
2926         struct he_tpdrq *tpdrq_head;
2927         int rbpl_head, rbpl_tail;
2928 #endif
2929         static long mcc = 0, oec = 0, dcc = 0, cec = 0;
2930
2931
2932         left = *pos;
2933         if (!left--)
2934                 return sprintf(page, "ATM he driver\n");
2935
2936         if (!left--)
2937                 return sprintf(page, "%s%s\n\n",
2938                         he_dev->prod_id, he_dev->media & 0x40 ? "SM" : "MM");
2939
2940         if (!left--)
2941                 return sprintf(page, "Mismatched Cells  VPI/VCI Not Open  Dropped Cells  RCM Dropped Cells\n");
2942
2943         spin_lock_irqsave(&he_dev->global_lock, flags);
2944         mcc += he_readl(he_dev, MCC);
2945         oec += he_readl(he_dev, OEC);
2946         dcc += he_readl(he_dev, DCC);
2947         cec += he_readl(he_dev, CEC);
2948         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2949
2950         if (!left--)
2951                 return sprintf(page, "%16ld  %16ld  %13ld  %17ld\n\n",
2952                                                         mcc, oec, dcc, cec);
2953
2954         if (!left--)
2955                 return sprintf(page, "irq_size = %d  inuse = ?  peak = %d\n",
2956                                 CONFIG_IRQ_SIZE, he_dev->irq_peak);
2957
2958         if (!left--)
2959                 return sprintf(page, "tpdrq_size = %d  inuse = ?\n",
2960                                                 CONFIG_TPDRQ_SIZE);
2961
2962         if (!left--)
2963                 return sprintf(page, "rbrq_size = %d  inuse = ?  peak = %d\n",
2964                                 CONFIG_RBRQ_SIZE, he_dev->rbrq_peak);
2965
2966         if (!left--)
2967                 return sprintf(page, "tbrq_size = %d  peak = %d\n",
2968                                         CONFIG_TBRQ_SIZE, he_dev->tbrq_peak);
2969
2970
2971 #ifdef notdef
2972         rbpl_head = RBPL_MASK(he_readl(he_dev, G0_RBPL_S));
2973         rbpl_tail = RBPL_MASK(he_readl(he_dev, G0_RBPL_T));
2974
2975         inuse = rbpl_head - rbpl_tail;
2976         if (inuse < 0)
2977                 inuse += CONFIG_RBPL_SIZE * sizeof(struct he_rbp);
2978         inuse /= sizeof(struct he_rbp);
2979
2980         if (!left--)
2981                 return sprintf(page, "rbpl_size = %d  inuse = %d\n\n",
2982                                                 CONFIG_RBPL_SIZE, inuse);
2983 #endif
2984
2985         if (!left--)
2986                 return sprintf(page, "rate controller periods (cbr)\n                 pcr  #vc\n");
2987
2988         for (i = 0; i < HE_NUM_CS_STPER; ++i)
2989                 if (!left--)
2990                         return sprintf(page, "cs_stper%-2d  %8ld  %3d\n", i,
2991                                                 he_dev->cs_stper[i].pcr,
2992                                                 he_dev->cs_stper[i].inuse);
2993
2994         if (!left--)
2995                 return sprintf(page, "total bw (cbr): %d  (limit %d)\n",
2996                         he_dev->total_bw, he_dev->atm_dev->link_rate * 10 / 9);
2997
2998         return 0;
2999 }
3000
3001 /* eeprom routines  -- see 4.7 */
3002
3003 u8
3004 read_prom_byte(struct he_dev *he_dev, int addr)
3005 {
3006         u32 val = 0, tmp_read = 0;
3007         int i, j = 0;
3008         u8 byte_read = 0;
3009
3010         val = readl(he_dev->membase + HOST_CNTL);
3011         val &= 0xFFFFE0FF;
3012
3013         /* Turn on write enable */
3014         val |= 0x800;
3015         he_writel(he_dev, val, HOST_CNTL);
3016
3017         /* Send READ instruction */
3018         for (i = 0; i < ARRAY_SIZE(readtab); i++) {
3019                 he_writel(he_dev, val | readtab[i], HOST_CNTL);
3020                 udelay(EEPROM_DELAY);
3021         }
3022
3023         /* Next, we need to send the byte address to read from */
3024         for (i = 7; i >= 0; i--) {
3025                 he_writel(he_dev, val | clocktab[j++] | (((addr >> i) & 1) << 9), HOST_CNTL);
3026                 udelay(EEPROM_DELAY);
3027                 he_writel(he_dev, val | clocktab[j++] | (((addr >> i) & 1) << 9), HOST_CNTL);
3028                 udelay(EEPROM_DELAY);
3029         }
3030
3031         j = 0;
3032
3033         val &= 0xFFFFF7FF;      /* Turn off write enable */
3034         he_writel(he_dev, val, HOST_CNTL);
3035
3036         /* Now, we can read data from the EEPROM by clocking it in */
3037         for (i = 7; i >= 0; i--) {
3038                 he_writel(he_dev, val | clocktab[j++], HOST_CNTL);
3039                 udelay(EEPROM_DELAY);
3040                 tmp_read = he_readl(he_dev, HOST_CNTL);
3041                 byte_read |= (unsigned char)
3042                            ((tmp_read & ID_DOUT) >> ID_DOFFSET << i);
3043                 he_writel(he_dev, val | clocktab[j++], HOST_CNTL);
3044                 udelay(EEPROM_DELAY);
3045         }
3046
3047         he_writel(he_dev, val | ID_CS, HOST_CNTL);
3048         udelay(EEPROM_DELAY);
3049
3050         return byte_read;
3051 }
3052
3053 MODULE_LICENSE("GPL");
3054 MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
3055 MODULE_DESCRIPTION("ForeRunnerHE ATM Adapter driver");
3056 module_param(disable64, bool, 0);
3057 MODULE_PARM_DESC(disable64, "disable 64-bit pci bus transfers");
3058 module_param(nvpibits, short, 0);
3059 MODULE_PARM_DESC(nvpibits, "numbers of bits for vpi (default 0)");
3060 module_param(nvcibits, short, 0);
3061 MODULE_PARM_DESC(nvcibits, "numbers of bits for vci (default 12)");
3062 module_param(rx_skb_reserve, short, 0);
3063 MODULE_PARM_DESC(rx_skb_reserve, "padding for receive skb (default 16)");
3064 module_param(irq_coalesce, bool, 0);
3065 MODULE_PARM_DESC(irq_coalesce, "use interrupt coalescing (default 1)");
3066 module_param(sdh, bool, 0);
3067 MODULE_PARM_DESC(sdh, "use SDH framing (default 0)");
3068
3069 static struct pci_device_id he_pci_tbl[] = {
3070         { PCI_VENDOR_ID_FORE, PCI_DEVICE_ID_FORE_HE, PCI_ANY_ID, PCI_ANY_ID,
3071           0, 0, 0 },
3072         { 0, }
3073 };
3074
3075 MODULE_DEVICE_TABLE(pci, he_pci_tbl);
3076
3077 static struct pci_driver he_driver = {
3078         .name =         "he",
3079         .probe =        he_init_one,
3080         .remove =       __devexit_p(he_remove_one),
3081         .id_table =     he_pci_tbl,
3082 };
3083
3084 static int __init he_init(void)
3085 {
3086         return pci_register_driver(&he_driver);
3087 }
3088
3089 static void __exit he_cleanup(void)
3090 {
3091         pci_unregister_driver(&he_driver);
3092 }
3093
3094 module_init(he_init);
3095 module_exit(he_cleanup);