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         if (he_isMM(he_dev))
1546                 suni_init(he_dev->atm_dev);
1547         if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->start)
1548                 he_dev->atm_dev->phy->start(he_dev->atm_dev);
1549 #endif /* CONFIG_ATM_HE_USE_SUNI */
1550
1551         if (sdh) {
1552                 /* this really should be in suni.c but for now... */
1553                 int val;
1554
1555                 val = he_phy_get(he_dev->atm_dev, SUNI_TPOP_APM);
1556                 val = (val & ~SUNI_TPOP_APM_S) | (SUNI_TPOP_S_SDH << SUNI_TPOP_APM_S_SHIFT);
1557                 he_phy_put(he_dev->atm_dev, val, SUNI_TPOP_APM);
1558                 he_phy_put(he_dev->atm_dev, SUNI_TACP_IUCHP_CLP, SUNI_TACP_IUCHP);
1559         }
1560
1561         /* 5.1.12 enable transmit and receive */
1562
1563         reg = he_readl_mbox(he_dev, CS_ERCTL0);
1564         reg |= TX_ENABLE|ER_ENABLE;
1565         he_writel_mbox(he_dev, reg, CS_ERCTL0);
1566
1567         reg = he_readl(he_dev, RC_CONFIG);
1568         reg |= RX_ENABLE;
1569         he_writel(he_dev, reg, RC_CONFIG);
1570
1571         for (i = 0; i < HE_NUM_CS_STPER; ++i) {
1572                 he_dev->cs_stper[i].inuse = 0;
1573                 he_dev->cs_stper[i].pcr = -1;
1574         }
1575         he_dev->total_bw = 0;
1576
1577
1578         /* atm linux initialization */
1579
1580         he_dev->atm_dev->ci_range.vpi_bits = he_dev->vpibits;
1581         he_dev->atm_dev->ci_range.vci_bits = he_dev->vcibits;
1582
1583         he_dev->irq_peak = 0;
1584         he_dev->rbrq_peak = 0;
1585         he_dev->rbpl_peak = 0;
1586         he_dev->tbrq_peak = 0;
1587
1588         HPRINTK("hell bent for leather!\n");
1589
1590         return 0;
1591 }
1592
1593 static void
1594 he_stop(struct he_dev *he_dev)
1595 {
1596         u16 command;
1597         u32 gen_cntl_0, reg;
1598         struct pci_dev *pci_dev;
1599
1600         pci_dev = he_dev->pci_dev;
1601
1602         /* disable interrupts */
1603
1604         if (he_dev->membase) {
1605                 pci_read_config_dword(pci_dev, GEN_CNTL_0, &gen_cntl_0);
1606                 gen_cntl_0 &= ~(INT_PROC_ENBL | INIT_ENB);
1607                 pci_write_config_dword(pci_dev, GEN_CNTL_0, gen_cntl_0);
1608
1609 #ifdef USE_TASKLET
1610                 tasklet_disable(&he_dev->tasklet);
1611 #endif
1612
1613                 /* disable recv and transmit */
1614
1615                 reg = he_readl_mbox(he_dev, CS_ERCTL0);
1616                 reg &= ~(TX_ENABLE|ER_ENABLE);
1617                 he_writel_mbox(he_dev, reg, CS_ERCTL0);
1618
1619                 reg = he_readl(he_dev, RC_CONFIG);
1620                 reg &= ~(RX_ENABLE);
1621                 he_writel(he_dev, reg, RC_CONFIG);
1622         }
1623
1624 #ifdef CONFIG_ATM_HE_USE_SUNI
1625         if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->stop)
1626                 he_dev->atm_dev->phy->stop(he_dev->atm_dev);
1627 #endif /* CONFIG_ATM_HE_USE_SUNI */
1628
1629         if (he_dev->irq)
1630                 free_irq(he_dev->irq, he_dev);
1631
1632         if (he_dev->irq_base)
1633                 pci_free_consistent(he_dev->pci_dev, (CONFIG_IRQ_SIZE+1)
1634                         * sizeof(struct he_irq), he_dev->irq_base, he_dev->irq_phys);
1635
1636         if (he_dev->hsp)
1637                 pci_free_consistent(he_dev->pci_dev, sizeof(struct he_hsp),
1638                                                 he_dev->hsp, he_dev->hsp_phys);
1639
1640         if (he_dev->rbpl_base) {
1641 #ifdef USE_RBPL_POOL
1642                 int i;
1643
1644                 for (i = 0; i < CONFIG_RBPL_SIZE; ++i) {
1645                         void *cpuaddr = he_dev->rbpl_virt[i].virt;
1646                         dma_addr_t dma_handle = he_dev->rbpl_base[i].phys;
1647
1648                         pci_pool_free(he_dev->rbpl_pool, cpuaddr, dma_handle);
1649                 }
1650 #else
1651                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPL_SIZE
1652                         * CONFIG_RBPL_BUFSIZE, he_dev->rbpl_pages, he_dev->rbpl_pages_phys);
1653 #endif
1654                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPL_SIZE
1655                         * sizeof(struct he_rbp), he_dev->rbpl_base, he_dev->rbpl_phys);
1656         }
1657
1658 #ifdef USE_RBPL_POOL
1659         if (he_dev->rbpl_pool)
1660                 pci_pool_destroy(he_dev->rbpl_pool);
1661 #endif
1662
1663 #ifdef USE_RBPS
1664         if (he_dev->rbps_base) {
1665 #ifdef USE_RBPS_POOL
1666                 int i;
1667
1668                 for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
1669                         void *cpuaddr = he_dev->rbps_virt[i].virt;
1670                         dma_addr_t dma_handle = he_dev->rbps_base[i].phys;
1671
1672                         pci_pool_free(he_dev->rbps_pool, cpuaddr, dma_handle);
1673                 }
1674 #else
1675                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
1676                         * CONFIG_RBPS_BUFSIZE, he_dev->rbps_pages, he_dev->rbps_pages_phys);
1677 #endif
1678                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
1679                         * sizeof(struct he_rbp), he_dev->rbps_base, he_dev->rbps_phys);
1680         }
1681
1682 #ifdef USE_RBPS_POOL
1683         if (he_dev->rbps_pool)
1684                 pci_pool_destroy(he_dev->rbps_pool);
1685 #endif
1686
1687 #endif /* USE_RBPS */
1688
1689         if (he_dev->rbrq_base)
1690                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq),
1691                                                         he_dev->rbrq_base, he_dev->rbrq_phys);
1692
1693         if (he_dev->tbrq_base)
1694                 pci_free_consistent(he_dev->pci_dev, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq),
1695                                                         he_dev->tbrq_base, he_dev->tbrq_phys);
1696
1697         if (he_dev->tpdrq_base)
1698                 pci_free_consistent(he_dev->pci_dev, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq),
1699                                                         he_dev->tpdrq_base, he_dev->tpdrq_phys);
1700
1701 #ifdef USE_TPD_POOL
1702         if (he_dev->tpd_pool)
1703                 pci_pool_destroy(he_dev->tpd_pool);
1704 #else
1705         if (he_dev->tpd_base)
1706                 pci_free_consistent(he_dev->pci_dev, CONFIG_NUMTPDS * sizeof(struct he_tpd),
1707                                                         he_dev->tpd_base, he_dev->tpd_base_phys);
1708 #endif
1709
1710         if (he_dev->pci_dev) {
1711                 pci_read_config_word(he_dev->pci_dev, PCI_COMMAND, &command);
1712                 command &= ~(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
1713                 pci_write_config_word(he_dev->pci_dev, PCI_COMMAND, command);
1714         }
1715
1716         if (he_dev->membase)
1717                 iounmap(he_dev->membase);
1718 }
1719
1720 static struct he_tpd *
1721 __alloc_tpd(struct he_dev *he_dev)
1722 {
1723 #ifdef USE_TPD_POOL
1724         struct he_tpd *tpd;
1725         dma_addr_t dma_handle;
1726
1727         tpd = pci_pool_alloc(he_dev->tpd_pool, GFP_ATOMIC|GFP_DMA, &dma_handle);
1728         if (tpd == NULL)
1729                 return NULL;
1730
1731         tpd->status = TPD_ADDR(dma_handle);
1732         tpd->reserved = 0;
1733         tpd->iovec[0].addr = 0; tpd->iovec[0].len = 0;
1734         tpd->iovec[1].addr = 0; tpd->iovec[1].len = 0;
1735         tpd->iovec[2].addr = 0; tpd->iovec[2].len = 0;
1736
1737         return tpd;
1738 #else
1739         int i;
1740
1741         for (i = 0; i < CONFIG_NUMTPDS; ++i) {
1742                 ++he_dev->tpd_head;
1743                 if (he_dev->tpd_head > he_dev->tpd_end) {
1744                         he_dev->tpd_head = he_dev->tpd_base;
1745                 }
1746
1747                 if (!he_dev->tpd_head->inuse) {
1748                         he_dev->tpd_head->inuse = 1;
1749                         he_dev->tpd_head->status &= TPD_MASK;
1750                         he_dev->tpd_head->iovec[0].addr = 0; he_dev->tpd_head->iovec[0].len = 0;
1751                         he_dev->tpd_head->iovec[1].addr = 0; he_dev->tpd_head->iovec[1].len = 0;
1752                         he_dev->tpd_head->iovec[2].addr = 0; he_dev->tpd_head->iovec[2].len = 0;
1753                         return he_dev->tpd_head;
1754                 }
1755         }
1756         hprintk("out of tpds -- increase CONFIG_NUMTPDS (%d)\n", CONFIG_NUMTPDS);
1757         return NULL;
1758 #endif
1759 }
1760
1761 #define AAL5_LEN(buf,len)                                               \
1762                         ((((unsigned char *)(buf))[(len)-6] << 8) |     \
1763                                 (((unsigned char *)(buf))[(len)-5]))
1764
1765 /* 2.10.1.2 receive
1766  *
1767  * aal5 packets can optionally return the tcp checksum in the lower
1768  * 16 bits of the crc (RSR0_TCP_CKSUM)
1769  */
1770
1771 #define TCP_CKSUM(buf,len)                                              \
1772                         ((((unsigned char *)(buf))[(len)-2] << 8) |     \
1773                                 (((unsigned char *)(buf))[(len-1)]))
1774
1775 static int
1776 he_service_rbrq(struct he_dev *he_dev, int group)
1777 {
1778         struct he_rbrq *rbrq_tail = (struct he_rbrq *)
1779                                 ((unsigned long)he_dev->rbrq_base |
1780                                         he_dev->hsp->group[group].rbrq_tail);
1781         struct he_rbp *rbp = NULL;
1782         unsigned cid, lastcid = -1;
1783         unsigned buf_len = 0;
1784         struct sk_buff *skb;
1785         struct atm_vcc *vcc = NULL;
1786         struct he_vcc *he_vcc;
1787         struct he_iovec *iov;
1788         int pdus_assembled = 0;
1789         int updated = 0;
1790
1791         read_lock(&vcc_sklist_lock);
1792         while (he_dev->rbrq_head != rbrq_tail) {
1793                 ++updated;
1794
1795                 HPRINTK("%p rbrq%d 0x%x len=%d cid=0x%x %s%s%s%s%s%s\n",
1796                         he_dev->rbrq_head, group,
1797                         RBRQ_ADDR(he_dev->rbrq_head),
1798                         RBRQ_BUFLEN(he_dev->rbrq_head),
1799                         RBRQ_CID(he_dev->rbrq_head),
1800                         RBRQ_CRC_ERR(he_dev->rbrq_head) ? " CRC_ERR" : "",
1801                         RBRQ_LEN_ERR(he_dev->rbrq_head) ? " LEN_ERR" : "",
1802                         RBRQ_END_PDU(he_dev->rbrq_head) ? " END_PDU" : "",
1803                         RBRQ_AAL5_PROT(he_dev->rbrq_head) ? " AAL5_PROT" : "",
1804                         RBRQ_CON_CLOSED(he_dev->rbrq_head) ? " CON_CLOSED" : "",
1805                         RBRQ_HBUF_ERR(he_dev->rbrq_head) ? " HBUF_ERR" : "");
1806
1807 #ifdef USE_RBPS
1808                 if (RBRQ_ADDR(he_dev->rbrq_head) & RBP_SMALLBUF)
1809                         rbp = &he_dev->rbps_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
1810                 else
1811 #endif
1812                         rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
1813
1814                 buf_len = RBRQ_BUFLEN(he_dev->rbrq_head) * 4;
1815                 cid = RBRQ_CID(he_dev->rbrq_head);
1816
1817                 if (cid != lastcid)
1818                         vcc = __find_vcc(he_dev, cid);
1819                 lastcid = cid;
1820
1821                 if (vcc == NULL) {
1822                         hprintk("vcc == NULL  (cid 0x%x)\n", cid);
1823                         if (!RBRQ_HBUF_ERR(he_dev->rbrq_head))
1824                                         rbp->status &= ~RBP_LOANED;
1825
1826                         goto next_rbrq_entry;
1827                 }
1828
1829                 he_vcc = HE_VCC(vcc);
1830                 if (he_vcc == NULL) {
1831                         hprintk("he_vcc == NULL  (cid 0x%x)\n", cid);
1832                         if (!RBRQ_HBUF_ERR(he_dev->rbrq_head))
1833                                         rbp->status &= ~RBP_LOANED;
1834                         goto next_rbrq_entry;
1835                 }
1836
1837                 if (RBRQ_HBUF_ERR(he_dev->rbrq_head)) {
1838                         hprintk("HBUF_ERR!  (cid 0x%x)\n", cid);
1839                                 atomic_inc(&vcc->stats->rx_drop);
1840                         goto return_host_buffers;
1841                 }
1842
1843                 he_vcc->iov_tail->iov_base = RBRQ_ADDR(he_dev->rbrq_head);
1844                 he_vcc->iov_tail->iov_len = buf_len;
1845                 he_vcc->pdu_len += buf_len;
1846                 ++he_vcc->iov_tail;
1847
1848                 if (RBRQ_CON_CLOSED(he_dev->rbrq_head)) {
1849                         lastcid = -1;
1850                         HPRINTK("wake_up rx_waitq  (cid 0x%x)\n", cid);
1851                         wake_up(&he_vcc->rx_waitq);
1852                         goto return_host_buffers;
1853                 }
1854
1855 #ifdef notdef
1856                 if ((he_vcc->iov_tail - he_vcc->iov_head) > HE_MAXIOV) {
1857                         hprintk("iovec full!  cid 0x%x\n", cid);
1858                         goto return_host_buffers;
1859                 }
1860 #endif
1861                 if (!RBRQ_END_PDU(he_dev->rbrq_head))
1862                         goto next_rbrq_entry;
1863
1864                 if (RBRQ_LEN_ERR(he_dev->rbrq_head)
1865                                 || RBRQ_CRC_ERR(he_dev->rbrq_head)) {
1866                         HPRINTK("%s%s (%d.%d)\n",
1867                                 RBRQ_CRC_ERR(he_dev->rbrq_head)
1868                                                         ? "CRC_ERR " : "",
1869                                 RBRQ_LEN_ERR(he_dev->rbrq_head)
1870                                                         ? "LEN_ERR" : "",
1871                                                         vcc->vpi, vcc->vci);
1872                         atomic_inc(&vcc->stats->rx_err);
1873                         goto return_host_buffers;
1874                 }
1875
1876                 skb = atm_alloc_charge(vcc, he_vcc->pdu_len + rx_skb_reserve,
1877                                                         GFP_ATOMIC);
1878                 if (!skb) {
1879                         HPRINTK("charge failed (%d.%d)\n", vcc->vpi, vcc->vci);
1880                         goto return_host_buffers;
1881                 }
1882
1883                 if (rx_skb_reserve > 0)
1884                         skb_reserve(skb, rx_skb_reserve);
1885
1886                 __net_timestamp(skb);
1887
1888                 for (iov = he_vcc->iov_head;
1889                                 iov < he_vcc->iov_tail; ++iov) {
1890 #ifdef USE_RBPS
1891                         if (iov->iov_base & RBP_SMALLBUF)
1892                                 memcpy(skb_put(skb, iov->iov_len),
1893                                         he_dev->rbps_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
1894                         else
1895 #endif
1896                                 memcpy(skb_put(skb, iov->iov_len),
1897                                         he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
1898                 }
1899
1900                 switch (vcc->qos.aal) {
1901                         case ATM_AAL0:
1902                                 /* 2.10.1.5 raw cell receive */
1903                                 skb->len = ATM_AAL0_SDU;
1904                                 skb_set_tail_pointer(skb, skb->len);
1905                                 break;
1906                         case ATM_AAL5:
1907                                 /* 2.10.1.2 aal5 receive */
1908
1909                                 skb->len = AAL5_LEN(skb->data, he_vcc->pdu_len);
1910                                 skb_set_tail_pointer(skb, skb->len);
1911 #ifdef USE_CHECKSUM_HW
1912                                 if (vcc->vpi == 0 && vcc->vci >= ATM_NOT_RSV_VCI) {
1913                                         skb->ip_summed = CHECKSUM_COMPLETE;
1914                                         skb->csum = TCP_CKSUM(skb->data,
1915                                                         he_vcc->pdu_len);
1916                                 }
1917 #endif
1918                                 break;
1919                 }
1920
1921 #ifdef should_never_happen
1922                 if (skb->len > vcc->qos.rxtp.max_sdu)
1923                         hprintk("pdu_len (%d) > vcc->qos.rxtp.max_sdu (%d)!  cid 0x%x\n", skb->len, vcc->qos.rxtp.max_sdu, cid);
1924 #endif
1925
1926 #ifdef notdef
1927                 ATM_SKB(skb)->vcc = vcc;
1928 #endif
1929                 spin_unlock(&he_dev->global_lock);
1930                 vcc->push(vcc, skb);
1931                 spin_lock(&he_dev->global_lock);
1932
1933                 atomic_inc(&vcc->stats->rx);
1934
1935 return_host_buffers:
1936                 ++pdus_assembled;
1937
1938                 for (iov = he_vcc->iov_head;
1939                                 iov < he_vcc->iov_tail; ++iov) {
1940 #ifdef USE_RBPS
1941                         if (iov->iov_base & RBP_SMALLBUF)
1942                                 rbp = &he_dev->rbps_base[RBP_INDEX(iov->iov_base)];
1943                         else
1944 #endif
1945                                 rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
1946
1947                         rbp->status &= ~RBP_LOANED;
1948                 }
1949
1950                 he_vcc->iov_tail = he_vcc->iov_head;
1951                 he_vcc->pdu_len = 0;
1952
1953 next_rbrq_entry:
1954                 he_dev->rbrq_head = (struct he_rbrq *)
1955                                 ((unsigned long) he_dev->rbrq_base |
1956                                         RBRQ_MASK(++he_dev->rbrq_head));
1957
1958         }
1959         read_unlock(&vcc_sklist_lock);
1960
1961         if (updated) {
1962                 if (updated > he_dev->rbrq_peak)
1963                         he_dev->rbrq_peak = updated;
1964
1965                 he_writel(he_dev, RBRQ_MASK(he_dev->rbrq_head),
1966                                                 G0_RBRQ_H + (group * 16));
1967         }
1968
1969         return pdus_assembled;
1970 }
1971
1972 static void
1973 he_service_tbrq(struct he_dev *he_dev, int group)
1974 {
1975         struct he_tbrq *tbrq_tail = (struct he_tbrq *)
1976                                 ((unsigned long)he_dev->tbrq_base |
1977                                         he_dev->hsp->group[group].tbrq_tail);
1978         struct he_tpd *tpd;
1979         int slot, updated = 0;
1980 #ifdef USE_TPD_POOL
1981         struct he_tpd *__tpd;
1982 #endif
1983
1984         /* 2.1.6 transmit buffer return queue */
1985
1986         while (he_dev->tbrq_head != tbrq_tail) {
1987                 ++updated;
1988
1989                 HPRINTK("tbrq%d 0x%x%s%s\n",
1990                         group,
1991                         TBRQ_TPD(he_dev->tbrq_head),
1992                         TBRQ_EOS(he_dev->tbrq_head) ? " EOS" : "",
1993                         TBRQ_MULTIPLE(he_dev->tbrq_head) ? " MULTIPLE" : "");
1994 #ifdef USE_TPD_POOL
1995                 tpd = NULL;
1996                 list_for_each_entry(__tpd, &he_dev->outstanding_tpds, entry) {
1997                         if (TPD_ADDR(__tpd->status) == TBRQ_TPD(he_dev->tbrq_head)) {
1998                                 tpd = __tpd;
1999                                 list_del(&__tpd->entry);
2000                                 break;
2001                         }
2002                 }
2003
2004                 if (tpd == NULL) {
2005                         hprintk("unable to locate tpd for dma buffer %x\n",
2006                                                 TBRQ_TPD(he_dev->tbrq_head));
2007                         goto next_tbrq_entry;
2008                 }
2009 #else
2010                 tpd = &he_dev->tpd_base[ TPD_INDEX(TBRQ_TPD(he_dev->tbrq_head)) ];
2011 #endif
2012
2013                 if (TBRQ_EOS(he_dev->tbrq_head)) {
2014                         HPRINTK("wake_up(tx_waitq) cid 0x%x\n",
2015                                 he_mkcid(he_dev, tpd->vcc->vpi, tpd->vcc->vci));
2016                         if (tpd->vcc)
2017                                 wake_up(&HE_VCC(tpd->vcc)->tx_waitq);
2018
2019                         goto next_tbrq_entry;
2020                 }
2021
2022                 for (slot = 0; slot < TPD_MAXIOV; ++slot) {
2023                         if (tpd->iovec[slot].addr)
2024                                 pci_unmap_single(he_dev->pci_dev,
2025                                         tpd->iovec[slot].addr,
2026                                         tpd->iovec[slot].len & TPD_LEN_MASK,
2027                                                         PCI_DMA_TODEVICE);
2028                         if (tpd->iovec[slot].len & TPD_LST)
2029                                 break;
2030
2031                 }
2032
2033                 if (tpd->skb) { /* && !TBRQ_MULTIPLE(he_dev->tbrq_head) */
2034                         if (tpd->vcc && tpd->vcc->pop)
2035                                 tpd->vcc->pop(tpd->vcc, tpd->skb);
2036                         else
2037                                 dev_kfree_skb_any(tpd->skb);
2038                 }
2039
2040 next_tbrq_entry:
2041 #ifdef USE_TPD_POOL
2042                 if (tpd)
2043                         pci_pool_free(he_dev->tpd_pool, tpd, TPD_ADDR(tpd->status));
2044 #else
2045                 tpd->inuse = 0;
2046 #endif
2047                 he_dev->tbrq_head = (struct he_tbrq *)
2048                                 ((unsigned long) he_dev->tbrq_base |
2049                                         TBRQ_MASK(++he_dev->tbrq_head));
2050         }
2051
2052         if (updated) {
2053                 if (updated > he_dev->tbrq_peak)
2054                         he_dev->tbrq_peak = updated;
2055
2056                 he_writel(he_dev, TBRQ_MASK(he_dev->tbrq_head),
2057                                                 G0_TBRQ_H + (group * 16));
2058         }
2059 }
2060
2061
2062 static void
2063 he_service_rbpl(struct he_dev *he_dev, int group)
2064 {
2065         struct he_rbp *newtail;
2066         struct he_rbp *rbpl_head;
2067         int moved = 0;
2068
2069         rbpl_head = (struct he_rbp *) ((unsigned long)he_dev->rbpl_base |
2070                                         RBPL_MASK(he_readl(he_dev, G0_RBPL_S)));
2071
2072         for (;;) {
2073                 newtail = (struct he_rbp *) ((unsigned long)he_dev->rbpl_base |
2074                                                 RBPL_MASK(he_dev->rbpl_tail+1));
2075
2076                 /* table 3.42 -- rbpl_tail should never be set to rbpl_head */
2077                 if ((newtail == rbpl_head) || (newtail->status & RBP_LOANED))
2078                         break;
2079
2080                 newtail->status |= RBP_LOANED;
2081                 he_dev->rbpl_tail = newtail;
2082                 ++moved;
2083         }
2084
2085         if (moved)
2086                 he_writel(he_dev, RBPL_MASK(he_dev->rbpl_tail), G0_RBPL_T);
2087 }
2088
2089 #ifdef USE_RBPS
2090 static void
2091 he_service_rbps(struct he_dev *he_dev, int group)
2092 {
2093         struct he_rbp *newtail;
2094         struct he_rbp *rbps_head;
2095         int moved = 0;
2096
2097         rbps_head = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
2098                                         RBPS_MASK(he_readl(he_dev, G0_RBPS_S)));
2099
2100         for (;;) {
2101                 newtail = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
2102                                                 RBPS_MASK(he_dev->rbps_tail+1));
2103
2104                 /* table 3.42 -- rbps_tail should never be set to rbps_head */
2105                 if ((newtail == rbps_head) || (newtail->status & RBP_LOANED))
2106                         break;
2107
2108                 newtail->status |= RBP_LOANED;
2109                 he_dev->rbps_tail = newtail;
2110                 ++moved;
2111         }
2112
2113         if (moved)
2114                 he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail), G0_RBPS_T);
2115 }
2116 #endif /* USE_RBPS */
2117
2118 static void
2119 he_tasklet(unsigned long data)
2120 {
2121         unsigned long flags;
2122         struct he_dev *he_dev = (struct he_dev *) data;
2123         int group, type;
2124         int updated = 0;
2125
2126         HPRINTK("tasklet (0x%lx)\n", data);
2127 #ifdef USE_TASKLET
2128         spin_lock_irqsave(&he_dev->global_lock, flags);
2129 #endif
2130
2131         while (he_dev->irq_head != he_dev->irq_tail) {
2132                 ++updated;
2133
2134                 type = ITYPE_TYPE(he_dev->irq_head->isw);
2135                 group = ITYPE_GROUP(he_dev->irq_head->isw);
2136
2137                 switch (type) {
2138                         case ITYPE_RBRQ_THRESH:
2139                                 HPRINTK("rbrq%d threshold\n", group);
2140                                 /* fall through */
2141                         case ITYPE_RBRQ_TIMER:
2142                                 if (he_service_rbrq(he_dev, group)) {
2143                                         he_service_rbpl(he_dev, group);
2144 #ifdef USE_RBPS
2145                                         he_service_rbps(he_dev, group);
2146 #endif /* USE_RBPS */
2147                                 }
2148                                 break;
2149                         case ITYPE_TBRQ_THRESH:
2150                                 HPRINTK("tbrq%d threshold\n", group);
2151                                 /* fall through */
2152                         case ITYPE_TPD_COMPLETE:
2153                                 he_service_tbrq(he_dev, group);
2154                                 break;
2155                         case ITYPE_RBPL_THRESH:
2156                                 he_service_rbpl(he_dev, group);
2157                                 break;
2158                         case ITYPE_RBPS_THRESH:
2159 #ifdef USE_RBPS
2160                                 he_service_rbps(he_dev, group);
2161 #endif /* USE_RBPS */
2162                                 break;
2163                         case ITYPE_PHY:
2164                                 HPRINTK("phy interrupt\n");
2165 #ifdef CONFIG_ATM_HE_USE_SUNI
2166                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2167                                 if (he_dev->atm_dev->phy && he_dev->atm_dev->phy->interrupt)
2168                                         he_dev->atm_dev->phy->interrupt(he_dev->atm_dev);
2169                                 spin_lock_irqsave(&he_dev->global_lock, flags);
2170 #endif
2171                                 break;
2172                         case ITYPE_OTHER:
2173                                 switch (type|group) {
2174                                         case ITYPE_PARITY:
2175                                                 hprintk("parity error\n");
2176                                                 break;
2177                                         case ITYPE_ABORT:
2178                                                 hprintk("abort 0x%x\n", he_readl(he_dev, ABORT_ADDR));
2179                                                 break;
2180                                 }
2181                                 break;
2182                         case ITYPE_TYPE(ITYPE_INVALID):
2183                                 /* see 8.1.1 -- check all queues */
2184
2185                                 HPRINTK("isw not updated 0x%x\n", he_dev->irq_head->isw);
2186
2187                                 he_service_rbrq(he_dev, 0);
2188                                 he_service_rbpl(he_dev, 0);
2189 #ifdef USE_RBPS
2190                                 he_service_rbps(he_dev, 0);
2191 #endif /* USE_RBPS */
2192                                 he_service_tbrq(he_dev, 0);
2193                                 break;
2194                         default:
2195                                 hprintk("bad isw 0x%x?\n", he_dev->irq_head->isw);
2196                 }
2197
2198                 he_dev->irq_head->isw = ITYPE_INVALID;
2199
2200                 he_dev->irq_head = (struct he_irq *) NEXT_ENTRY(he_dev->irq_base, he_dev->irq_head, IRQ_MASK);
2201         }
2202
2203         if (updated) {
2204                 if (updated > he_dev->irq_peak)
2205                         he_dev->irq_peak = updated;
2206
2207                 he_writel(he_dev,
2208                         IRQ_SIZE(CONFIG_IRQ_SIZE) |
2209                         IRQ_THRESH(CONFIG_IRQ_THRESH) |
2210                         IRQ_TAIL(he_dev->irq_tail), IRQ0_HEAD);
2211                 (void) he_readl(he_dev, INT_FIFO); /* 8.1.2 controller errata; flush posted writes */
2212         }
2213 #ifdef USE_TASKLET
2214         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2215 #endif
2216 }
2217
2218 static irqreturn_t
2219 he_irq_handler(int irq, void *dev_id)
2220 {
2221         unsigned long flags;
2222         struct he_dev *he_dev = (struct he_dev * )dev_id;
2223         int handled = 0;
2224
2225         if (he_dev == NULL)
2226                 return IRQ_NONE;
2227
2228         spin_lock_irqsave(&he_dev->global_lock, flags);
2229
2230         he_dev->irq_tail = (struct he_irq *) (((unsigned long)he_dev->irq_base) |
2231                                                 (*he_dev->irq_tailoffset << 2));
2232
2233         if (he_dev->irq_tail == he_dev->irq_head) {
2234                 HPRINTK("tailoffset not updated?\n");
2235                 he_dev->irq_tail = (struct he_irq *) ((unsigned long)he_dev->irq_base |
2236                         ((he_readl(he_dev, IRQ0_BASE) & IRQ_MASK) << 2));
2237                 (void) he_readl(he_dev, INT_FIFO);      /* 8.1.2 controller errata */
2238         }
2239
2240 #ifdef DEBUG
2241         if (he_dev->irq_head == he_dev->irq_tail /* && !IRQ_PENDING */)
2242                 hprintk("spurious (or shared) interrupt?\n");
2243 #endif
2244
2245         if (he_dev->irq_head != he_dev->irq_tail) {
2246                 handled = 1;
2247 #ifdef USE_TASKLET
2248                 tasklet_schedule(&he_dev->tasklet);
2249 #else
2250                 he_tasklet((unsigned long) he_dev);
2251 #endif
2252                 he_writel(he_dev, INT_CLEAR_A, INT_FIFO);       /* clear interrupt */
2253                 (void) he_readl(he_dev, INT_FIFO);              /* flush posted writes */
2254         }
2255         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2256         return IRQ_RETVAL(handled);
2257
2258 }
2259
2260 static __inline__ void
2261 __enqueue_tpd(struct he_dev *he_dev, struct he_tpd *tpd, unsigned cid)
2262 {
2263         struct he_tpdrq *new_tail;
2264
2265         HPRINTK("tpdrq %p cid 0x%x -> tpdrq_tail %p\n",
2266                                         tpd, cid, he_dev->tpdrq_tail);
2267
2268         /* new_tail = he_dev->tpdrq_tail; */
2269         new_tail = (struct he_tpdrq *) ((unsigned long) he_dev->tpdrq_base |
2270                                         TPDRQ_MASK(he_dev->tpdrq_tail+1));
2271
2272         /*
2273          * check to see if we are about to set the tail == head
2274          * if true, update the head pointer from the adapter
2275          * to see if this is really the case (reading the queue
2276          * head for every enqueue would be unnecessarily slow)
2277          */
2278
2279         if (new_tail == he_dev->tpdrq_head) {
2280                 he_dev->tpdrq_head = (struct he_tpdrq *)
2281                         (((unsigned long)he_dev->tpdrq_base) |
2282                                 TPDRQ_MASK(he_readl(he_dev, TPDRQ_B_H)));
2283
2284                 if (new_tail == he_dev->tpdrq_head) {
2285                         int slot;
2286
2287                         hprintk("tpdrq full (cid 0x%x)\n", cid);
2288                         /*
2289                          * FIXME
2290                          * push tpd onto a transmit backlog queue
2291                          * after service_tbrq, service the backlog
2292                          * for now, we just drop the pdu
2293                          */
2294                         for (slot = 0; slot < TPD_MAXIOV; ++slot) {
2295                                 if (tpd->iovec[slot].addr)
2296                                         pci_unmap_single(he_dev->pci_dev,
2297                                                 tpd->iovec[slot].addr,
2298                                                 tpd->iovec[slot].len & TPD_LEN_MASK,
2299                                                                 PCI_DMA_TODEVICE);
2300                         }
2301                         if (tpd->skb) {
2302                                 if (tpd->vcc->pop)
2303                                         tpd->vcc->pop(tpd->vcc, tpd->skb);
2304                                 else
2305                                         dev_kfree_skb_any(tpd->skb);
2306                                 atomic_inc(&tpd->vcc->stats->tx_err);
2307                         }
2308 #ifdef USE_TPD_POOL
2309                         pci_pool_free(he_dev->tpd_pool, tpd, TPD_ADDR(tpd->status));
2310 #else
2311                         tpd->inuse = 0;
2312 #endif
2313                         return;
2314                 }
2315         }
2316
2317         /* 2.1.5 transmit packet descriptor ready queue */
2318 #ifdef USE_TPD_POOL
2319         list_add_tail(&tpd->entry, &he_dev->outstanding_tpds);
2320         he_dev->tpdrq_tail->tpd = TPD_ADDR(tpd->status);
2321 #else
2322         he_dev->tpdrq_tail->tpd = he_dev->tpd_base_phys +
2323                                 (TPD_INDEX(tpd->status) * sizeof(struct he_tpd));
2324 #endif
2325         he_dev->tpdrq_tail->cid = cid;
2326         wmb();
2327
2328         he_dev->tpdrq_tail = new_tail;
2329
2330         he_writel(he_dev, TPDRQ_MASK(he_dev->tpdrq_tail), TPDRQ_T);
2331         (void) he_readl(he_dev, TPDRQ_T);               /* flush posted writes */
2332 }
2333
2334 static int
2335 he_open(struct atm_vcc *vcc)
2336 {
2337         unsigned long flags;
2338         struct he_dev *he_dev = HE_DEV(vcc->dev);
2339         struct he_vcc *he_vcc;
2340         int err = 0;
2341         unsigned cid, rsr0, rsr1, rsr4, tsr0, tsr0_aal, tsr4, period, reg, clock;
2342         short vpi = vcc->vpi;
2343         int vci = vcc->vci;
2344
2345         if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
2346                 return 0;
2347
2348         HPRINTK("open vcc %p %d.%d\n", vcc, vpi, vci);
2349
2350         set_bit(ATM_VF_ADDR, &vcc->flags);
2351
2352         cid = he_mkcid(he_dev, vpi, vci);
2353
2354         he_vcc = kmalloc(sizeof(struct he_vcc), GFP_ATOMIC);
2355         if (he_vcc == NULL) {
2356                 hprintk("unable to allocate he_vcc during open\n");
2357                 return -ENOMEM;
2358         }
2359
2360         he_vcc->iov_tail = he_vcc->iov_head;
2361         he_vcc->pdu_len = 0;
2362         he_vcc->rc_index = -1;
2363
2364         init_waitqueue_head(&he_vcc->rx_waitq);
2365         init_waitqueue_head(&he_vcc->tx_waitq);
2366
2367         vcc->dev_data = he_vcc;
2368
2369         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2370                 int pcr_goal;
2371
2372                 pcr_goal = atm_pcr_goal(&vcc->qos.txtp);
2373                 if (pcr_goal == 0)
2374                         pcr_goal = he_dev->atm_dev->link_rate;
2375                 if (pcr_goal < 0)       /* means round down, technically */
2376                         pcr_goal = -pcr_goal;
2377
2378                 HPRINTK("open tx cid 0x%x pcr_goal %d\n", cid, pcr_goal);
2379
2380                 switch (vcc->qos.aal) {
2381                         case ATM_AAL5:
2382                                 tsr0_aal = TSR0_AAL5;
2383                                 tsr4 = TSR4_AAL5;
2384                                 break;
2385                         case ATM_AAL0:
2386                                 tsr0_aal = TSR0_AAL0_SDU;
2387                                 tsr4 = TSR4_AAL0_SDU;
2388                                 break;
2389                         default:
2390                                 err = -EINVAL;
2391                                 goto open_failed;
2392                 }
2393
2394                 spin_lock_irqsave(&he_dev->global_lock, flags);
2395                 tsr0 = he_readl_tsr0(he_dev, cid);
2396                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2397
2398                 if (TSR0_CONN_STATE(tsr0) != 0) {
2399                         hprintk("cid 0x%x not idle (tsr0 = 0x%x)\n", cid, tsr0);
2400                         err = -EBUSY;
2401                         goto open_failed;
2402                 }
2403
2404                 switch (vcc->qos.txtp.traffic_class) {
2405                         case ATM_UBR:
2406                                 /* 2.3.3.1 open connection ubr */
2407
2408                                 tsr0 = TSR0_UBR | TSR0_GROUP(0) | tsr0_aal |
2409                                         TSR0_USE_WMIN | TSR0_UPDATE_GER;
2410                                 break;
2411
2412                         case ATM_CBR:
2413                                 /* 2.3.3.2 open connection cbr */
2414
2415                                 /* 8.2.3 cbr scheduler wrap problem -- limit to 90% total link rate */
2416                                 if ((he_dev->total_bw + pcr_goal)
2417                                         > (he_dev->atm_dev->link_rate * 9 / 10))
2418                                 {
2419                                         err = -EBUSY;
2420                                         goto open_failed;
2421                                 }
2422
2423                                 spin_lock_irqsave(&he_dev->global_lock, flags);                 /* also protects he_dev->cs_stper[] */
2424
2425                                 /* find an unused cs_stper register */
2426                                 for (reg = 0; reg < HE_NUM_CS_STPER; ++reg)
2427                                         if (he_dev->cs_stper[reg].inuse == 0 ||
2428                                             he_dev->cs_stper[reg].pcr == pcr_goal)
2429                                                         break;
2430
2431                                 if (reg == HE_NUM_CS_STPER) {
2432                                         err = -EBUSY;
2433                                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2434                                         goto open_failed;
2435                                 }
2436
2437                                 he_dev->total_bw += pcr_goal;
2438
2439                                 he_vcc->rc_index = reg;
2440                                 ++he_dev->cs_stper[reg].inuse;
2441                                 he_dev->cs_stper[reg].pcr = pcr_goal;
2442
2443                                 clock = he_is622(he_dev) ? 66667000 : 50000000;
2444                                 period = clock / pcr_goal;
2445
2446                                 HPRINTK("rc_index = %d period = %d\n",
2447                                                                 reg, period);
2448
2449                                 he_writel_mbox(he_dev, rate_to_atmf(period/2),
2450                                                         CS_STPER0 + reg);
2451                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2452
2453                                 tsr0 = TSR0_CBR | TSR0_GROUP(0) | tsr0_aal |
2454                                                         TSR0_RC_INDEX(reg);
2455
2456                                 break;
2457                         default:
2458                                 err = -EINVAL;
2459                                 goto open_failed;
2460                 }
2461
2462                 spin_lock_irqsave(&he_dev->global_lock, flags);
2463
2464                 he_writel_tsr0(he_dev, tsr0, cid);
2465                 he_writel_tsr4(he_dev, tsr4 | 1, cid);
2466                 he_writel_tsr1(he_dev, TSR1_MCR(rate_to_atmf(0)) |
2467                                         TSR1_PCR(rate_to_atmf(pcr_goal)), cid);
2468                 he_writel_tsr2(he_dev, TSR2_ACR(rate_to_atmf(pcr_goal)), cid);
2469                 he_writel_tsr9(he_dev, TSR9_OPEN_CONN, cid);
2470
2471                 he_writel_tsr3(he_dev, 0x0, cid);
2472                 he_writel_tsr5(he_dev, 0x0, cid);
2473                 he_writel_tsr6(he_dev, 0x0, cid);
2474                 he_writel_tsr7(he_dev, 0x0, cid);
2475                 he_writel_tsr8(he_dev, 0x0, cid);
2476                 he_writel_tsr10(he_dev, 0x0, cid);
2477                 he_writel_tsr11(he_dev, 0x0, cid);
2478                 he_writel_tsr12(he_dev, 0x0, cid);
2479                 he_writel_tsr13(he_dev, 0x0, cid);
2480                 he_writel_tsr14(he_dev, 0x0, cid);
2481                 (void) he_readl_tsr0(he_dev, cid);              /* flush posted writes */
2482                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2483         }
2484
2485         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2486                 unsigned aal;
2487
2488                 HPRINTK("open rx cid 0x%x (rx_waitq %p)\n", cid,
2489                                                 &HE_VCC(vcc)->rx_waitq);
2490
2491                 switch (vcc->qos.aal) {
2492                         case ATM_AAL5:
2493                                 aal = RSR0_AAL5;
2494                                 break;
2495                         case ATM_AAL0:
2496                                 aal = RSR0_RAWCELL;
2497                                 break;
2498                         default:
2499                                 err = -EINVAL;
2500                                 goto open_failed;
2501                 }
2502
2503                 spin_lock_irqsave(&he_dev->global_lock, flags);
2504
2505                 rsr0 = he_readl_rsr0(he_dev, cid);
2506                 if (rsr0 & RSR0_OPEN_CONN) {
2507                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2508
2509                         hprintk("cid 0x%x not idle (rsr0 = 0x%x)\n", cid, rsr0);
2510                         err = -EBUSY;
2511                         goto open_failed;
2512                 }
2513
2514 #ifdef USE_RBPS
2515                 rsr1 = RSR1_GROUP(0);
2516                 rsr4 = RSR4_GROUP(0);
2517 #else /* !USE_RBPS */
2518                 rsr1 = RSR1_GROUP(0)|RSR1_RBPL_ONLY;
2519                 rsr4 = RSR4_GROUP(0)|RSR4_RBPL_ONLY;
2520 #endif /* USE_RBPS */
2521                 rsr0 = vcc->qos.rxtp.traffic_class == ATM_UBR ?
2522                                 (RSR0_EPD_ENABLE|RSR0_PPD_ENABLE) : 0;
2523
2524 #ifdef USE_CHECKSUM_HW
2525                 if (vpi == 0 && vci >= ATM_NOT_RSV_VCI)
2526                         rsr0 |= RSR0_TCP_CKSUM;
2527 #endif
2528
2529                 he_writel_rsr4(he_dev, rsr4, cid);
2530                 he_writel_rsr1(he_dev, rsr1, cid);
2531                 /* 5.1.11 last parameter initialized should be
2532                           the open/closed indication in rsr0 */
2533                 he_writel_rsr0(he_dev,
2534                         rsr0 | RSR0_START_PDU | RSR0_OPEN_CONN | aal, cid);
2535                 (void) he_readl_rsr0(he_dev, cid);              /* flush posted writes */
2536
2537                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2538         }
2539
2540 open_failed:
2541
2542         if (err) {
2543                 kfree(he_vcc);
2544                 clear_bit(ATM_VF_ADDR, &vcc->flags);
2545         }
2546         else
2547                 set_bit(ATM_VF_READY, &vcc->flags);
2548
2549         return err;
2550 }
2551
2552 static void
2553 he_close(struct atm_vcc *vcc)
2554 {
2555         unsigned long flags;
2556         DECLARE_WAITQUEUE(wait, current);
2557         struct he_dev *he_dev = HE_DEV(vcc->dev);
2558         struct he_tpd *tpd;
2559         unsigned cid;
2560         struct he_vcc *he_vcc = HE_VCC(vcc);
2561 #define MAX_RETRY 30
2562         int retry = 0, sleep = 1, tx_inuse;
2563
2564         HPRINTK("close vcc %p %d.%d\n", vcc, vcc->vpi, vcc->vci);
2565
2566         clear_bit(ATM_VF_READY, &vcc->flags);
2567         cid = he_mkcid(he_dev, vcc->vpi, vcc->vci);
2568
2569         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2570                 int timeout;
2571
2572                 HPRINTK("close rx cid 0x%x\n", cid);
2573
2574                 /* 2.7.2.2 close receive operation */
2575
2576                 /* wait for previous close (if any) to finish */
2577
2578                 spin_lock_irqsave(&he_dev->global_lock, flags);
2579                 while (he_readl(he_dev, RCC_STAT) & RCC_BUSY) {
2580                         HPRINTK("close cid 0x%x RCC_BUSY\n", cid);
2581                         udelay(250);
2582                 }
2583
2584                 set_current_state(TASK_UNINTERRUPTIBLE);
2585                 add_wait_queue(&he_vcc->rx_waitq, &wait);
2586
2587                 he_writel_rsr0(he_dev, RSR0_CLOSE_CONN, cid);
2588                 (void) he_readl_rsr0(he_dev, cid);              /* flush posted writes */
2589                 he_writel_mbox(he_dev, cid, RXCON_CLOSE);
2590                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2591
2592                 timeout = schedule_timeout(30*HZ);
2593
2594                 remove_wait_queue(&he_vcc->rx_waitq, &wait);
2595                 set_current_state(TASK_RUNNING);
2596
2597                 if (timeout == 0)
2598                         hprintk("close rx timeout cid 0x%x\n", cid);
2599
2600                 HPRINTK("close rx cid 0x%x complete\n", cid);
2601
2602         }
2603
2604         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2605                 volatile unsigned tsr4, tsr0;
2606                 int timeout;
2607
2608                 HPRINTK("close tx cid 0x%x\n", cid);
2609
2610                 /* 2.1.2
2611                  *
2612                  * ... the host must first stop queueing packets to the TPDRQ
2613                  * on the connection to be closed, then wait for all outstanding
2614                  * packets to be transmitted and their buffers returned to the
2615                  * TBRQ. When the last packet on the connection arrives in the
2616                  * TBRQ, the host issues the close command to the adapter.
2617                  */
2618
2619                 while (((tx_inuse = atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) > 0) &&
2620                        (retry < MAX_RETRY)) {
2621                         msleep(sleep);
2622                         if (sleep < 250)
2623                                 sleep = sleep * 2;
2624
2625                         ++retry;
2626                 }
2627
2628                 if (tx_inuse)
2629                         hprintk("close tx cid 0x%x tx_inuse = %d\n", cid, tx_inuse);
2630
2631                 /* 2.3.1.1 generic close operations with flush */
2632
2633                 spin_lock_irqsave(&he_dev->global_lock, flags);
2634                 he_writel_tsr4_upper(he_dev, TSR4_FLUSH_CONN, cid);
2635                                         /* also clears TSR4_SESSION_ENDED */
2636
2637                 switch (vcc->qos.txtp.traffic_class) {
2638                         case ATM_UBR:
2639                                 he_writel_tsr1(he_dev,
2640                                         TSR1_MCR(rate_to_atmf(200000))
2641                                         | TSR1_PCR(0), cid);
2642                                 break;
2643                         case ATM_CBR:
2644                                 he_writel_tsr14_upper(he_dev, TSR14_DELETE, cid);
2645                                 break;
2646                 }
2647                 (void) he_readl_tsr4(he_dev, cid);              /* flush posted writes */
2648
2649                 tpd = __alloc_tpd(he_dev);
2650                 if (tpd == NULL) {
2651                         hprintk("close tx he_alloc_tpd failed cid 0x%x\n", cid);
2652                         goto close_tx_incomplete;
2653                 }
2654                 tpd->status |= TPD_EOS | TPD_INT;
2655                 tpd->skb = NULL;
2656                 tpd->vcc = vcc;
2657                 wmb();
2658
2659                 set_current_state(TASK_UNINTERRUPTIBLE);
2660                 add_wait_queue(&he_vcc->tx_waitq, &wait);
2661                 __enqueue_tpd(he_dev, tpd, cid);
2662                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2663
2664                 timeout = schedule_timeout(30*HZ);
2665
2666                 remove_wait_queue(&he_vcc->tx_waitq, &wait);
2667                 set_current_state(TASK_RUNNING);
2668
2669                 spin_lock_irqsave(&he_dev->global_lock, flags);
2670
2671                 if (timeout == 0) {
2672                         hprintk("close tx timeout cid 0x%x\n", cid);
2673                         goto close_tx_incomplete;
2674                 }
2675
2676                 while (!((tsr4 = he_readl_tsr4(he_dev, cid)) & TSR4_SESSION_ENDED)) {
2677                         HPRINTK("close tx cid 0x%x !TSR4_SESSION_ENDED (tsr4 = 0x%x)\n", cid, tsr4);
2678                         udelay(250);
2679                 }
2680
2681                 while (TSR0_CONN_STATE(tsr0 = he_readl_tsr0(he_dev, cid)) != 0) {
2682                         HPRINTK("close tx cid 0x%x TSR0_CONN_STATE != 0 (tsr0 = 0x%x)\n", cid, tsr0);
2683                         udelay(250);
2684                 }
2685
2686 close_tx_incomplete:
2687
2688                 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
2689                         int reg = he_vcc->rc_index;
2690
2691                         HPRINTK("cs_stper reg = %d\n", reg);
2692
2693                         if (he_dev->cs_stper[reg].inuse == 0)
2694                                 hprintk("cs_stper[%d].inuse = 0!\n", reg);
2695                         else
2696                                 --he_dev->cs_stper[reg].inuse;
2697
2698                         he_dev->total_bw -= he_dev->cs_stper[reg].pcr;
2699                 }
2700                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2701
2702                 HPRINTK("close tx cid 0x%x complete\n", cid);
2703         }
2704
2705         kfree(he_vcc);
2706
2707         clear_bit(ATM_VF_ADDR, &vcc->flags);
2708 }
2709
2710 static int
2711 he_send(struct atm_vcc *vcc, struct sk_buff *skb)
2712 {
2713         unsigned long flags;
2714         struct he_dev *he_dev = HE_DEV(vcc->dev);
2715         unsigned cid = he_mkcid(he_dev, vcc->vpi, vcc->vci);
2716         struct he_tpd *tpd;
2717 #ifdef USE_SCATTERGATHER
2718         int i, slot = 0;
2719 #endif
2720
2721 #define HE_TPD_BUFSIZE 0xffff
2722
2723         HPRINTK("send %d.%d\n", vcc->vpi, vcc->vci);
2724
2725         if ((skb->len > HE_TPD_BUFSIZE) ||
2726             ((vcc->qos.aal == ATM_AAL0) && (skb->len != ATM_AAL0_SDU))) {
2727                 hprintk("buffer too large (or small) -- %d bytes\n", skb->len );
2728                 if (vcc->pop)
2729                         vcc->pop(vcc, skb);
2730                 else
2731                         dev_kfree_skb_any(skb);
2732                 atomic_inc(&vcc->stats->tx_err);
2733                 return -EINVAL;
2734         }
2735
2736 #ifndef USE_SCATTERGATHER
2737         if (skb_shinfo(skb)->nr_frags) {
2738                 hprintk("no scatter/gather support\n");
2739                 if (vcc->pop)
2740                         vcc->pop(vcc, skb);
2741                 else
2742                         dev_kfree_skb_any(skb);
2743                 atomic_inc(&vcc->stats->tx_err);
2744                 return -EINVAL;
2745         }
2746 #endif
2747         spin_lock_irqsave(&he_dev->global_lock, flags);
2748
2749         tpd = __alloc_tpd(he_dev);
2750         if (tpd == NULL) {
2751                 if (vcc->pop)
2752                         vcc->pop(vcc, skb);
2753                 else
2754                         dev_kfree_skb_any(skb);
2755                 atomic_inc(&vcc->stats->tx_err);
2756                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2757                 return -ENOMEM;
2758         }
2759
2760         if (vcc->qos.aal == ATM_AAL5)
2761                 tpd->status |= TPD_CELLTYPE(TPD_USERCELL);
2762         else {
2763                 char *pti_clp = (void *) (skb->data + 3);
2764                 int clp, pti;
2765
2766                 pti = (*pti_clp & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
2767                 clp = (*pti_clp & ATM_HDR_CLP);
2768                 tpd->status |= TPD_CELLTYPE(pti);
2769                 if (clp)
2770                         tpd->status |= TPD_CLP;
2771
2772                 skb_pull(skb, ATM_AAL0_SDU - ATM_CELL_PAYLOAD);
2773         }
2774
2775 #ifdef USE_SCATTERGATHER
2776         tpd->iovec[slot].addr = pci_map_single(he_dev->pci_dev, skb->data,
2777                                 skb->len - skb->data_len, PCI_DMA_TODEVICE);
2778         tpd->iovec[slot].len = skb->len - skb->data_len;
2779         ++slot;
2780
2781         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2782                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2783
2784                 if (slot == TPD_MAXIOV) {       /* queue tpd; start new tpd */
2785                         tpd->vcc = vcc;
2786                         tpd->skb = NULL;        /* not the last fragment
2787                                                    so dont ->push() yet */
2788                         wmb();
2789
2790                         __enqueue_tpd(he_dev, tpd, cid);
2791                         tpd = __alloc_tpd(he_dev);
2792                         if (tpd == NULL) {
2793                                 if (vcc->pop)
2794                                         vcc->pop(vcc, skb);
2795                                 else
2796                                         dev_kfree_skb_any(skb);
2797                                 atomic_inc(&vcc->stats->tx_err);
2798                                 spin_unlock_irqrestore(&he_dev->global_lock, flags);
2799                                 return -ENOMEM;
2800                         }
2801                         tpd->status |= TPD_USERCELL;
2802                         slot = 0;
2803                 }
2804
2805                 tpd->iovec[slot].addr = pci_map_single(he_dev->pci_dev,
2806                         (void *) page_address(frag->page) + frag->page_offset,
2807                                 frag->size, PCI_DMA_TODEVICE);
2808                 tpd->iovec[slot].len = frag->size;
2809                 ++slot;
2810
2811         }
2812
2813         tpd->iovec[slot - 1].len |= TPD_LST;
2814 #else
2815         tpd->address0 = pci_map_single(he_dev->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2816         tpd->length0 = skb->len | TPD_LST;
2817 #endif
2818         tpd->status |= TPD_INT;
2819
2820         tpd->vcc = vcc;
2821         tpd->skb = skb;
2822         wmb();
2823         ATM_SKB(skb)->vcc = vcc;
2824
2825         __enqueue_tpd(he_dev, tpd, cid);
2826         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2827
2828         atomic_inc(&vcc->stats->tx);
2829
2830         return 0;
2831 }
2832
2833 static int
2834 he_ioctl(struct atm_dev *atm_dev, unsigned int cmd, void __user *arg)
2835 {
2836         unsigned long flags;
2837         struct he_dev *he_dev = HE_DEV(atm_dev);
2838         struct he_ioctl_reg reg;
2839         int err = 0;
2840
2841         switch (cmd) {
2842                 case HE_GET_REG:
2843                         if (!capable(CAP_NET_ADMIN))
2844                                 return -EPERM;
2845
2846                         if (copy_from_user(&reg, arg,
2847                                            sizeof(struct he_ioctl_reg)))
2848                                 return -EFAULT;
2849
2850                         spin_lock_irqsave(&he_dev->global_lock, flags);
2851                         switch (reg.type) {
2852                                 case HE_REGTYPE_PCI:
2853                                         if (reg.addr < 0 || reg.addr >= HE_REGMAP_SIZE) {
2854                                                 err = -EINVAL;
2855                                                 break;
2856                                         }
2857
2858                                         reg.val = he_readl(he_dev, reg.addr);
2859                                         break;
2860                                 case HE_REGTYPE_RCM:
2861                                         reg.val =
2862                                                 he_readl_rcm(he_dev, reg.addr);
2863                                         break;
2864                                 case HE_REGTYPE_TCM:
2865                                         reg.val =
2866                                                 he_readl_tcm(he_dev, reg.addr);
2867                                         break;
2868                                 case HE_REGTYPE_MBOX:
2869                                         reg.val =
2870                                                 he_readl_mbox(he_dev, reg.addr);
2871                                         break;
2872                                 default:
2873                                         err = -EINVAL;
2874                                         break;
2875                         }
2876                         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2877                         if (err == 0)
2878                                 if (copy_to_user(arg, &reg,
2879                                                         sizeof(struct he_ioctl_reg)))
2880                                         return -EFAULT;
2881                         break;
2882                 default:
2883 #ifdef CONFIG_ATM_HE_USE_SUNI
2884                         if (atm_dev->phy && atm_dev->phy->ioctl)
2885                                 err = atm_dev->phy->ioctl(atm_dev, cmd, arg);
2886 #else /* CONFIG_ATM_HE_USE_SUNI */
2887                         err = -EINVAL;
2888 #endif /* CONFIG_ATM_HE_USE_SUNI */
2889                         break;
2890         }
2891
2892         return err;
2893 }
2894
2895 static void
2896 he_phy_put(struct atm_dev *atm_dev, unsigned char val, unsigned long addr)
2897 {
2898         unsigned long flags;
2899         struct he_dev *he_dev = HE_DEV(atm_dev);
2900
2901         HPRINTK("phy_put(val 0x%x, addr 0x%lx)\n", val, addr);
2902
2903         spin_lock_irqsave(&he_dev->global_lock, flags);
2904         he_writel(he_dev, val, FRAMER + (addr*4));
2905         (void) he_readl(he_dev, FRAMER + (addr*4));             /* flush posted writes */
2906         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2907 }
2908
2909
2910 static unsigned char
2911 he_phy_get(struct atm_dev *atm_dev, unsigned long addr)
2912 {
2913         unsigned long flags;
2914         struct he_dev *he_dev = HE_DEV(atm_dev);
2915         unsigned reg;
2916
2917         spin_lock_irqsave(&he_dev->global_lock, flags);
2918         reg = he_readl(he_dev, FRAMER + (addr*4));
2919         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2920
2921         HPRINTK("phy_get(addr 0x%lx) =0x%x\n", addr, reg);
2922         return reg;
2923 }
2924
2925 static int
2926 he_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2927 {
2928         unsigned long flags;
2929         struct he_dev *he_dev = HE_DEV(dev);
2930         int left, i;
2931 #ifdef notdef
2932         struct he_rbrq *rbrq_tail;
2933         struct he_tpdrq *tpdrq_head;
2934         int rbpl_head, rbpl_tail;
2935 #endif
2936         static long mcc = 0, oec = 0, dcc = 0, cec = 0;
2937
2938
2939         left = *pos;
2940         if (!left--)
2941                 return sprintf(page, "ATM he driver\n");
2942
2943         if (!left--)
2944                 return sprintf(page, "%s%s\n\n",
2945                         he_dev->prod_id, he_dev->media & 0x40 ? "SM" : "MM");
2946
2947         if (!left--)
2948                 return sprintf(page, "Mismatched Cells  VPI/VCI Not Open  Dropped Cells  RCM Dropped Cells\n");
2949
2950         spin_lock_irqsave(&he_dev->global_lock, flags);
2951         mcc += he_readl(he_dev, MCC);
2952         oec += he_readl(he_dev, OEC);
2953         dcc += he_readl(he_dev, DCC);
2954         cec += he_readl(he_dev, CEC);
2955         spin_unlock_irqrestore(&he_dev->global_lock, flags);
2956
2957         if (!left--)
2958                 return sprintf(page, "%16ld  %16ld  %13ld  %17ld\n\n",
2959                                                         mcc, oec, dcc, cec);
2960
2961         if (!left--)
2962                 return sprintf(page, "irq_size = %d  inuse = ?  peak = %d\n",
2963                                 CONFIG_IRQ_SIZE, he_dev->irq_peak);
2964
2965         if (!left--)
2966                 return sprintf(page, "tpdrq_size = %d  inuse = ?\n",
2967                                                 CONFIG_TPDRQ_SIZE);
2968
2969         if (!left--)
2970                 return sprintf(page, "rbrq_size = %d  inuse = ?  peak = %d\n",
2971                                 CONFIG_RBRQ_SIZE, he_dev->rbrq_peak);
2972
2973         if (!left--)
2974                 return sprintf(page, "tbrq_size = %d  peak = %d\n",
2975                                         CONFIG_TBRQ_SIZE, he_dev->tbrq_peak);
2976
2977
2978 #ifdef notdef
2979         rbpl_head = RBPL_MASK(he_readl(he_dev, G0_RBPL_S));
2980         rbpl_tail = RBPL_MASK(he_readl(he_dev, G0_RBPL_T));
2981
2982         inuse = rbpl_head - rbpl_tail;
2983         if (inuse < 0)
2984                 inuse += CONFIG_RBPL_SIZE * sizeof(struct he_rbp);
2985         inuse /= sizeof(struct he_rbp);
2986
2987         if (!left--)
2988                 return sprintf(page, "rbpl_size = %d  inuse = %d\n\n",
2989                                                 CONFIG_RBPL_SIZE, inuse);
2990 #endif
2991
2992         if (!left--)
2993                 return sprintf(page, "rate controller periods (cbr)\n                 pcr  #vc\n");
2994
2995         for (i = 0; i < HE_NUM_CS_STPER; ++i)
2996                 if (!left--)
2997                         return sprintf(page, "cs_stper%-2d  %8ld  %3d\n", i,
2998                                                 he_dev->cs_stper[i].pcr,
2999                                                 he_dev->cs_stper[i].inuse);
3000
3001         if (!left--)
3002                 return sprintf(page, "total bw (cbr): %d  (limit %d)\n",
3003                         he_dev->total_bw, he_dev->atm_dev->link_rate * 10 / 9);
3004
3005         return 0;
3006 }
3007
3008 /* eeprom routines  -- see 4.7 */
3009
3010 static u8 read_prom_byte(struct he_dev *he_dev, int addr)
3011 {
3012         u32 val = 0, tmp_read = 0;
3013         int i, j = 0;
3014         u8 byte_read = 0;
3015
3016         val = readl(he_dev->membase + HOST_CNTL);
3017         val &= 0xFFFFE0FF;
3018
3019         /* Turn on write enable */
3020         val |= 0x800;
3021         he_writel(he_dev, val, HOST_CNTL);
3022
3023         /* Send READ instruction */
3024         for (i = 0; i < ARRAY_SIZE(readtab); i++) {
3025                 he_writel(he_dev, val | readtab[i], HOST_CNTL);
3026                 udelay(EEPROM_DELAY);
3027         }
3028
3029         /* Next, we need to send the byte address to read from */
3030         for (i = 7; i >= 0; i--) {
3031                 he_writel(he_dev, val | clocktab[j++] | (((addr >> i) & 1) << 9), HOST_CNTL);
3032                 udelay(EEPROM_DELAY);
3033                 he_writel(he_dev, val | clocktab[j++] | (((addr >> i) & 1) << 9), HOST_CNTL);
3034                 udelay(EEPROM_DELAY);
3035         }
3036
3037         j = 0;
3038
3039         val &= 0xFFFFF7FF;      /* Turn off write enable */
3040         he_writel(he_dev, val, HOST_CNTL);
3041
3042         /* Now, we can read data from the EEPROM by clocking it in */
3043         for (i = 7; i >= 0; i--) {
3044                 he_writel(he_dev, val | clocktab[j++], HOST_CNTL);
3045                 udelay(EEPROM_DELAY);
3046                 tmp_read = he_readl(he_dev, HOST_CNTL);
3047                 byte_read |= (unsigned char)
3048                            ((tmp_read & ID_DOUT) >> ID_DOFFSET << i);
3049                 he_writel(he_dev, val | clocktab[j++], HOST_CNTL);
3050                 udelay(EEPROM_DELAY);
3051         }
3052
3053         he_writel(he_dev, val | ID_CS, HOST_CNTL);
3054         udelay(EEPROM_DELAY);
3055
3056         return byte_read;
3057 }
3058
3059 MODULE_LICENSE("GPL");
3060 MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>");
3061 MODULE_DESCRIPTION("ForeRunnerHE ATM Adapter driver");
3062 module_param(disable64, bool, 0);
3063 MODULE_PARM_DESC(disable64, "disable 64-bit pci bus transfers");
3064 module_param(nvpibits, short, 0);
3065 MODULE_PARM_DESC(nvpibits, "numbers of bits for vpi (default 0)");
3066 module_param(nvcibits, short, 0);
3067 MODULE_PARM_DESC(nvcibits, "numbers of bits for vci (default 12)");
3068 module_param(rx_skb_reserve, short, 0);
3069 MODULE_PARM_DESC(rx_skb_reserve, "padding for receive skb (default 16)");
3070 module_param(irq_coalesce, bool, 0);
3071 MODULE_PARM_DESC(irq_coalesce, "use interrupt coalescing (default 1)");
3072 module_param(sdh, bool, 0);
3073 MODULE_PARM_DESC(sdh, "use SDH framing (default 0)");
3074
3075 static struct pci_device_id he_pci_tbl[] = {
3076         { PCI_VENDOR_ID_FORE, PCI_DEVICE_ID_FORE_HE, PCI_ANY_ID, PCI_ANY_ID,
3077           0, 0, 0 },
3078         { 0, }
3079 };
3080
3081 MODULE_DEVICE_TABLE(pci, he_pci_tbl);
3082
3083 static struct pci_driver he_driver = {
3084         .name =         "he",
3085         .probe =        he_init_one,
3086         .remove =       __devexit_p(he_remove_one),
3087         .id_table =     he_pci_tbl,
3088 };
3089
3090 static int __init he_init(void)
3091 {
3092         return pci_register_driver(&he_driver);
3093 }
3094
3095 static void __exit he_cleanup(void)
3096 {
3097         pci_unregister_driver(&he_driver);
3098 }
3099
3100 module_init(he_init);
3101 module_exit(he_cleanup);