linux/drivers/pci/hotplug/ibmphp_core.c
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   1/*
   2 * IBM Hot Plug Controller Driver
   3 *
   4 * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
   5 *
   6 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
   7 * Copyright (C) 2001-2003 IBM Corp.
   8 *
   9 * All rights reserved.
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or (at
  14 * your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful, but
  17 * WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  19 * NON INFRINGEMENT.  See the GNU General Public License for more
  20 * details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 *
  26 * Send feedback to <gregkh@us.ibm.com>
  27 *
  28 */
  29
  30#include <linux/init.h>
  31#include <linux/module.h>
  32#include <linux/slab.h>
  33#include <linux/pci.h>
  34#include <linux/interrupt.h>
  35#include <linux/delay.h>
  36#include <linux/wait.h>
  37#include "../pci.h"
  38#include <asm/pci_x86.h>                /* for struct irq_routing_table */
  39#include <asm/io_apic.h>
  40#include "ibmphp.h"
  41
  42#define attn_on(sl)  ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
  43#define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
  44#define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
  45#define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
  46#define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
  47
  48#define DRIVER_VERSION  "0.6"
  49#define DRIVER_DESC     "IBM Hot Plug PCI Controller Driver"
  50
  51int ibmphp_debug;
  52
  53static bool debug;
  54module_param(debug, bool, S_IRUGO | S_IWUSR);
  55MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  56MODULE_LICENSE("GPL");
  57MODULE_DESCRIPTION(DRIVER_DESC);
  58
  59struct pci_bus *ibmphp_pci_bus;
  60static int max_slots;
  61
  62static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
  63                         * tables don't provide default info for empty slots */
  64
  65static int init_flag;
  66
  67/*
  68static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
  69
  70static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
  71{
  72        return get_max_adapter_speed_1 (hs, value, 1);
  73}
  74*/
  75static inline int get_cur_bus_info(struct slot **sl)
  76{
  77        int rc = 1;
  78        struct slot *slot_cur = *sl;
  79
  80        debug("options = %x\n", slot_cur->ctrl->options);
  81        debug("revision = %x\n", slot_cur->ctrl->revision);
  82
  83        if (READ_BUS_STATUS(slot_cur->ctrl))
  84                rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
  85
  86        if (rc)
  87                return rc;
  88
  89        slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
  90        if (READ_BUS_MODE(slot_cur->ctrl))
  91                slot_cur->bus_on->current_bus_mode =
  92                                CURRENT_BUS_MODE(slot_cur->busstatus);
  93        else
  94                slot_cur->bus_on->current_bus_mode = 0xFF;
  95
  96        debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
  97                        slot_cur->busstatus,
  98                        slot_cur->bus_on->current_speed,
  99                        slot_cur->bus_on->current_bus_mode);
 100
 101        *sl = slot_cur;
 102        return 0;
 103}
 104
 105static inline int slot_update(struct slot **sl)
 106{
 107        int rc;
 108        rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
 109        if (rc)
 110                return rc;
 111        if (!init_flag)
 112                rc = get_cur_bus_info(sl);
 113        return rc;
 114}
 115
 116static int __init get_max_slots(void)
 117{
 118        struct slot *slot_cur;
 119        u8 slot_count = 0;
 120
 121        list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 122                /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
 123                slot_count = max(slot_count, slot_cur->number);
 124        }
 125        return slot_count;
 126}
 127
 128/* This routine will put the correct slot->device information per slot.  It's
 129 * called from initialization of the slot structures. It will also assign
 130 * interrupt numbers per each slot.
 131 * Parameters: struct slot
 132 * Returns 0 or errors
 133 */
 134int ibmphp_init_devno(struct slot **cur_slot)
 135{
 136        struct irq_routing_table *rtable;
 137        int len;
 138        int loop;
 139        int i;
 140
 141        rtable = pcibios_get_irq_routing_table();
 142        if (!rtable) {
 143                err("no BIOS routing table...\n");
 144                return -ENOMEM;
 145        }
 146
 147        len = (rtable->size - sizeof(struct irq_routing_table)) /
 148                        sizeof(struct irq_info);
 149
 150        if (!len) {
 151                kfree(rtable);
 152                return -1;
 153        }
 154        for (loop = 0; loop < len; loop++) {
 155                if ((*cur_slot)->number == rtable->slots[loop].slot &&
 156                    (*cur_slot)->bus == rtable->slots[loop].bus) {
 157                        (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
 158                        for (i = 0; i < 4; i++)
 159                                (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
 160                                                (int) (*cur_slot)->device, i);
 161
 162                        debug("(*cur_slot)->irq[0] = %x\n",
 163                                        (*cur_slot)->irq[0]);
 164                        debug("(*cur_slot)->irq[1] = %x\n",
 165                                        (*cur_slot)->irq[1]);
 166                        debug("(*cur_slot)->irq[2] = %x\n",
 167                                        (*cur_slot)->irq[2]);
 168                        debug("(*cur_slot)->irq[3] = %x\n",
 169                                        (*cur_slot)->irq[3]);
 170
 171                        debug("rtable->exclusive_irqs = %x\n",
 172                                        rtable->exclusive_irqs);
 173                        debug("rtable->slots[loop].irq[0].bitmap = %x\n",
 174                                        rtable->slots[loop].irq[0].bitmap);
 175                        debug("rtable->slots[loop].irq[1].bitmap = %x\n",
 176                                        rtable->slots[loop].irq[1].bitmap);
 177                        debug("rtable->slots[loop].irq[2].bitmap = %x\n",
 178                                        rtable->slots[loop].irq[2].bitmap);
 179                        debug("rtable->slots[loop].irq[3].bitmap = %x\n",
 180                                        rtable->slots[loop].irq[3].bitmap);
 181
 182                        debug("rtable->slots[loop].irq[0].link = %x\n",
 183                                        rtable->slots[loop].irq[0].link);
 184                        debug("rtable->slots[loop].irq[1].link = %x\n",
 185                                        rtable->slots[loop].irq[1].link);
 186                        debug("rtable->slots[loop].irq[2].link = %x\n",
 187                                        rtable->slots[loop].irq[2].link);
 188                        debug("rtable->slots[loop].irq[3].link = %x\n",
 189                                        rtable->slots[loop].irq[3].link);
 190                        debug("end of init_devno\n");
 191                        kfree(rtable);
 192                        return 0;
 193                }
 194        }
 195
 196        kfree(rtable);
 197        return -1;
 198}
 199
 200static inline int power_on(struct slot *slot_cur)
 201{
 202        u8 cmd = HPC_SLOT_ON;
 203        int retval;
 204
 205        retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 206        if (retval) {
 207                err("power on failed\n");
 208                return retval;
 209        }
 210        if (CTLR_RESULT(slot_cur->ctrl->status)) {
 211                err("command not completed successfully in power_on\n");
 212                return -EIO;
 213        }
 214        msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
 215        return 0;
 216}
 217
 218static inline int power_off(struct slot *slot_cur)
 219{
 220        u8 cmd = HPC_SLOT_OFF;
 221        int retval;
 222
 223        retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 224        if (retval) {
 225                err("power off failed\n");
 226                return retval;
 227        }
 228        if (CTLR_RESULT(slot_cur->ctrl->status)) {
 229                err("command not completed successfully in power_off\n");
 230                retval = -EIO;
 231        }
 232        return retval;
 233}
 234
 235static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
 236{
 237        int rc = 0;
 238        struct slot *pslot;
 239        u8 cmd = 0x00;     /* avoid compiler warning */
 240
 241        debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
 242                        (ulong) hotplug_slot, value);
 243        ibmphp_lock_operations();
 244
 245
 246        if (hotplug_slot) {
 247                switch (value) {
 248                case HPC_SLOT_ATTN_OFF:
 249                        cmd = HPC_SLOT_ATTNOFF;
 250                        break;
 251                case HPC_SLOT_ATTN_ON:
 252                        cmd = HPC_SLOT_ATTNON;
 253                        break;
 254                case HPC_SLOT_ATTN_BLINK:
 255                        cmd = HPC_SLOT_BLINKLED;
 256                        break;
 257                default:
 258                        rc = -ENODEV;
 259                        err("set_attention_status - Error : invalid input [%x]\n",
 260                                        value);
 261                        break;
 262                }
 263                if (rc == 0) {
 264                        pslot = hotplug_slot->private;
 265                        if (pslot)
 266                                rc = ibmphp_hpc_writeslot(pslot, cmd);
 267                        else
 268                                rc = -ENODEV;
 269                }
 270        } else
 271                rc = -ENODEV;
 272
 273        ibmphp_unlock_operations();
 274
 275        debug("set_attention_status - Exit rc[%d]\n", rc);
 276        return rc;
 277}
 278
 279static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 280{
 281        int rc = -ENODEV;
 282        struct slot *pslot;
 283        struct slot myslot;
 284
 285        debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 286                                        (ulong) hotplug_slot, (ulong) value);
 287
 288        ibmphp_lock_operations();
 289        if (hotplug_slot) {
 290                pslot = hotplug_slot->private;
 291                if (pslot) {
 292                        memcpy(&myslot, pslot, sizeof(struct slot));
 293                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 294                                                &(myslot.status));
 295                        if (!rc)
 296                                rc = ibmphp_hpc_readslot(pslot,
 297                                                READ_EXTSLOTSTATUS,
 298                                                &(myslot.ext_status));
 299                        if (!rc)
 300                                *value = SLOT_ATTN(myslot.status,
 301                                                myslot.ext_status);
 302                }
 303        }
 304
 305        ibmphp_unlock_operations();
 306        debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
 307        return rc;
 308}
 309
 310static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 311{
 312        int rc = -ENODEV;
 313        struct slot *pslot;
 314        struct slot myslot;
 315
 316        debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 317                                        (ulong) hotplug_slot, (ulong) value);
 318        ibmphp_lock_operations();
 319        if (hotplug_slot) {
 320                pslot = hotplug_slot->private;
 321                if (pslot) {
 322                        memcpy(&myslot, pslot, sizeof(struct slot));
 323                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 324                                                &(myslot.status));
 325                        if (!rc)
 326                                *value = SLOT_LATCH(myslot.status);
 327                }
 328        }
 329
 330        ibmphp_unlock_operations();
 331        debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
 332                        rc, rc, *value);
 333        return rc;
 334}
 335
 336
 337static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 338{
 339        int rc = -ENODEV;
 340        struct slot *pslot;
 341        struct slot myslot;
 342
 343        debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 344                                        (ulong) hotplug_slot, (ulong) value);
 345        ibmphp_lock_operations();
 346        if (hotplug_slot) {
 347                pslot = hotplug_slot->private;
 348                if (pslot) {
 349                        memcpy(&myslot, pslot, sizeof(struct slot));
 350                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 351                                                &(myslot.status));
 352                        if (!rc)
 353                                *value = SLOT_PWRGD(myslot.status);
 354                }
 355        }
 356
 357        ibmphp_unlock_operations();
 358        debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
 359                        rc, rc, *value);
 360        return rc;
 361}
 362
 363static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
 364{
 365        int rc = -ENODEV;
 366        struct slot *pslot;
 367        u8 present;
 368        struct slot myslot;
 369
 370        debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 371                                        (ulong) hotplug_slot, (ulong) value);
 372        ibmphp_lock_operations();
 373        if (hotplug_slot) {
 374                pslot = hotplug_slot->private;
 375                if (pslot) {
 376                        memcpy(&myslot, pslot, sizeof(struct slot));
 377                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 378                                                &(myslot.status));
 379                        if (!rc) {
 380                                present = SLOT_PRESENT(myslot.status);
 381                                if (present == HPC_SLOT_EMPTY)
 382                                        *value = 0;
 383                                else
 384                                        *value = 1;
 385                        }
 386                }
 387        }
 388
 389        ibmphp_unlock_operations();
 390        debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
 391        return rc;
 392}
 393
 394static int get_max_bus_speed(struct slot *slot)
 395{
 396        int rc;
 397        u8 mode = 0;
 398        enum pci_bus_speed speed;
 399        struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
 400
 401        debug("%s - Entry slot[%p]\n", __func__, slot);
 402
 403        ibmphp_lock_operations();
 404        mode = slot->supported_bus_mode;
 405        speed = slot->supported_speed;
 406        ibmphp_unlock_operations();
 407
 408        switch (speed) {
 409        case BUS_SPEED_33:
 410                break;
 411        case BUS_SPEED_66:
 412                if (mode == BUS_MODE_PCIX)
 413                        speed += 0x01;
 414                break;
 415        case BUS_SPEED_100:
 416        case BUS_SPEED_133:
 417                speed += 0x01;
 418                break;
 419        default:
 420                /* Note (will need to change): there would be soon 256, 512 also */
 421                rc = -ENODEV;
 422        }
 423
 424        if (!rc)
 425                bus->max_bus_speed = speed;
 426
 427        debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
 428        return rc;
 429}
 430
 431/*
 432static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
 433{
 434        int rc = -ENODEV;
 435        struct slot *pslot;
 436        struct slot myslot;
 437
 438        debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 439                                                (ulong)hotplug_slot, (ulong) value);
 440
 441        if (flag)
 442                ibmphp_lock_operations();
 443
 444        if (hotplug_slot && value) {
 445                pslot = hotplug_slot->private;
 446                if (pslot) {
 447                        memcpy(&myslot, pslot, sizeof(struct slot));
 448                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 449                                                &(myslot.status));
 450
 451                        if (!(SLOT_LATCH (myslot.status)) &&
 452                                        (SLOT_PRESENT (myslot.status))) {
 453                                rc = ibmphp_hpc_readslot(pslot,
 454                                                READ_EXTSLOTSTATUS,
 455                                                &(myslot.ext_status));
 456                                if (!rc)
 457                                        *value = SLOT_SPEED(myslot.ext_status);
 458                        } else
 459                                *value = MAX_ADAPTER_NONE;
 460                }
 461        }
 462
 463        if (flag)
 464                ibmphp_unlock_operations();
 465
 466        debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
 467        return rc;
 468}
 469
 470static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
 471{
 472        int rc = -ENODEV;
 473        struct slot *pslot = NULL;
 474
 475        debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
 476
 477        ibmphp_lock_operations();
 478
 479        if (hotplug_slot) {
 480                pslot = hotplug_slot->private;
 481                if (pslot) {
 482                        rc = 0;
 483                        snprintf(value, 100, "Bus %x", pslot->bus);
 484                }
 485        } else
 486                rc = -ENODEV;
 487
 488        ibmphp_unlock_operations();
 489        debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
 490        return rc;
 491}
 492*/
 493
 494/****************************************************************************
 495 * This routine will initialize the ops data structure used in the validate
 496 * function. It will also power off empty slots that are powered on since BIOS
 497 * leaves those on, albeit disconnected
 498 ****************************************************************************/
 499static int __init init_ops(void)
 500{
 501        struct slot *slot_cur;
 502        int retval;
 503        int rc;
 504
 505        list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 506                debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
 507                                                        slot_cur->number);
 508                if (slot_cur->ctrl->revision == 0xFF)
 509                        if (get_ctrl_revision(slot_cur,
 510                                                &slot_cur->ctrl->revision))
 511                                return -1;
 512
 513                if (slot_cur->bus_on->current_speed == 0xFF)
 514                        if (get_cur_bus_info(&slot_cur))
 515                                return -1;
 516                get_max_bus_speed(slot_cur);
 517
 518                if (slot_cur->ctrl->options == 0xFF)
 519                        if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
 520                                return -1;
 521
 522                retval = slot_update(&slot_cur);
 523                if (retval)
 524                        return retval;
 525
 526                debug("status = %x\n", slot_cur->status);
 527                debug("ext_status = %x\n", slot_cur->ext_status);
 528                debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
 529                debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
 530                debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
 531
 532                if ((SLOT_PWRGD(slot_cur->status)) &&
 533                    !(SLOT_PRESENT(slot_cur->status)) &&
 534                    !(SLOT_LATCH(slot_cur->status))) {
 535                        debug("BEFORE POWER OFF COMMAND\n");
 536                                rc = power_off(slot_cur);
 537                                if (rc)
 538                                        return rc;
 539
 540        /*              retval = slot_update(&slot_cur);
 541         *              if (retval)
 542         *                      return retval;
 543         *              ibmphp_update_slot_info(slot_cur);
 544         */
 545                }
 546        }
 547        init_flag = 0;
 548        return 0;
 549}
 550
 551/* This operation will check whether the slot is within the bounds and
 552 * the operation is valid to perform on that slot
 553 * Parameters: slot, operation
 554 * Returns: 0 or error codes
 555 */
 556static int validate(struct slot *slot_cur, int opn)
 557{
 558        int number;
 559        int retval;
 560
 561        if (!slot_cur)
 562                return -ENODEV;
 563        number = slot_cur->number;
 564        if ((number > max_slots) || (number < 0))
 565                return -EBADSLT;
 566        debug("slot_number in validate is %d\n", slot_cur->number);
 567
 568        retval = slot_update(&slot_cur);
 569        if (retval)
 570                return retval;
 571
 572        switch (opn) {
 573                case ENABLE:
 574                        if (!(SLOT_PWRGD(slot_cur->status)) &&
 575                             (SLOT_PRESENT(slot_cur->status)) &&
 576                             !(SLOT_LATCH(slot_cur->status)))
 577                                return 0;
 578                        break;
 579                case DISABLE:
 580                        if ((SLOT_PWRGD(slot_cur->status)) &&
 581                            (SLOT_PRESENT(slot_cur->status)) &&
 582                            !(SLOT_LATCH(slot_cur->status)))
 583                                return 0;
 584                        break;
 585                default:
 586                        break;
 587        }
 588        err("validate failed....\n");
 589        return -EINVAL;
 590}
 591
 592/****************************************************************************
 593 * This routine is for updating the data structures in the hotplug core
 594 * Parameters: struct slot
 595 * Returns: 0 or error
 596 ****************************************************************************/
 597int ibmphp_update_slot_info(struct slot *slot_cur)
 598{
 599        struct hotplug_slot_info *info;
 600        struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
 601        int rc;
 602        u8 bus_speed;
 603        u8 mode;
 604
 605        info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 606        if (!info) {
 607                err("out of system memory\n");
 608                return -ENOMEM;
 609        }
 610
 611        info->power_status = SLOT_PWRGD(slot_cur->status);
 612        info->attention_status = SLOT_ATTN(slot_cur->status,
 613                                                slot_cur->ext_status);
 614        info->latch_status = SLOT_LATCH(slot_cur->status);
 615        if (!SLOT_PRESENT(slot_cur->status)) {
 616                info->adapter_status = 0;
 617/*              info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
 618        } else {
 619                info->adapter_status = 1;
 620/*              get_max_adapter_speed_1(slot_cur->hotplug_slot,
 621                                        &info->max_adapter_speed_status, 0); */
 622        }
 623
 624        bus_speed = slot_cur->bus_on->current_speed;
 625        mode = slot_cur->bus_on->current_bus_mode;
 626
 627        switch (bus_speed) {
 628                case BUS_SPEED_33:
 629                        break;
 630                case BUS_SPEED_66:
 631                        if (mode == BUS_MODE_PCIX)
 632                                bus_speed += 0x01;
 633                        else if (mode == BUS_MODE_PCI)
 634                                ;
 635                        else
 636                                bus_speed = PCI_SPEED_UNKNOWN;
 637                        break;
 638                case BUS_SPEED_100:
 639                case BUS_SPEED_133:
 640                        bus_speed += 0x01;
 641                        break;
 642                default:
 643                        bus_speed = PCI_SPEED_UNKNOWN;
 644        }
 645
 646        bus->cur_bus_speed = bus_speed;
 647        // To do: bus_names
 648
 649        rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
 650        kfree(info);
 651        return rc;
 652}
 653
 654
 655/******************************************************************************
 656 * This function will return the pci_func, given bus and devfunc, or NULL.  It
 657 * is called from visit routines
 658 ******************************************************************************/
 659
 660static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
 661{
 662        struct pci_func *func_cur;
 663        struct slot *slot_cur;
 664        list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 665                if (slot_cur->func) {
 666                        func_cur = slot_cur->func;
 667                        while (func_cur) {
 668                                if ((func_cur->busno == busno) &&
 669                                                (func_cur->device == device) &&
 670                                                (func_cur->function == function))
 671                                        return func_cur;
 672                                func_cur = func_cur->next;
 673                        }
 674                }
 675        }
 676        return NULL;
 677}
 678
 679/*************************************************************
 680 * This routine frees up memory used by struct slot, including
 681 * the pointers to pci_func, bus, hotplug_slot, controller,
 682 * and deregistering from the hotplug core
 683 *************************************************************/
 684static void free_slots(void)
 685{
 686        struct slot *slot_cur, *next;
 687
 688        debug("%s -- enter\n", __func__);
 689
 690        list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
 691                                 ibm_slot_list) {
 692                pci_hp_deregister(slot_cur->hotplug_slot);
 693        }
 694        debug("%s -- exit\n", __func__);
 695}
 696
 697static void ibm_unconfigure_device(struct pci_func *func)
 698{
 699        struct pci_dev *temp;
 700        u8 j;
 701
 702        debug("inside %s\n", __func__);
 703        debug("func->device = %x, func->function = %x\n",
 704                                        func->device, func->function);
 705        debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
 706
 707        pci_lock_rescan_remove();
 708
 709        for (j = 0; j < 0x08; j++) {
 710                temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
 711                if (temp) {
 712                        pci_stop_and_remove_bus_device(temp);
 713                        pci_dev_put(temp);
 714                }
 715        }
 716
 717        pci_dev_put(func->dev);
 718
 719        pci_unlock_rescan_remove();
 720}
 721
 722/*
 723 * The following function is to fix kernel bug regarding
 724 * getting bus entries, here we manually add those primary
 725 * bus entries to kernel bus structure whenever apply
 726 */
 727static u8 bus_structure_fixup(u8 busno)
 728{
 729        struct pci_bus *bus, *b;
 730        struct pci_dev *dev;
 731        u16 l;
 732
 733        if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
 734                return 1;
 735
 736        bus = kmalloc(sizeof(*bus), GFP_KERNEL);
 737        if (!bus) {
 738                err("%s - out of memory\n", __func__);
 739                return 1;
 740        }
 741        dev = kmalloc(sizeof(*dev), GFP_KERNEL);
 742        if (!dev) {
 743                kfree(bus);
 744                err("%s - out of memory\n", __func__);
 745                return 1;
 746        }
 747
 748        bus->number = busno;
 749        bus->ops = ibmphp_pci_bus->ops;
 750        dev->bus = bus;
 751        for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
 752                if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
 753                                        (l != 0x0000) && (l != 0xffff)) {
 754                        debug("%s - Inside bus_structure_fixup()\n",
 755                                                        __func__);
 756                        b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
 757                        if (!b)
 758                                continue;
 759
 760                        pci_bus_add_devices(b);
 761                        break;
 762                }
 763        }
 764
 765        kfree(dev);
 766        kfree(bus);
 767
 768        return 0;
 769}
 770
 771static int ibm_configure_device(struct pci_func *func)
 772{
 773        struct pci_bus *child;
 774        int num;
 775        int flag = 0;   /* this is to make sure we don't double scan the bus,
 776                                        for bridged devices primarily */
 777
 778        pci_lock_rescan_remove();
 779
 780        if (!(bus_structure_fixup(func->busno)))
 781                flag = 1;
 782        if (func->dev == NULL)
 783                func->dev = pci_get_bus_and_slot(func->busno,
 784                                PCI_DEVFN(func->device, func->function));
 785
 786        if (func->dev == NULL) {
 787                struct pci_bus *bus = pci_find_bus(0, func->busno);
 788                if (!bus)
 789                        goto out;
 790
 791                num = pci_scan_slot(bus,
 792                                PCI_DEVFN(func->device, func->function));
 793                if (num)
 794                        pci_bus_add_devices(bus);
 795
 796                func->dev = pci_get_bus_and_slot(func->busno,
 797                                PCI_DEVFN(func->device, func->function));
 798                if (func->dev == NULL) {
 799                        err("ERROR... : pci_dev still NULL\n");
 800                        goto out;
 801                }
 802        }
 803        if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
 804                pci_hp_add_bridge(func->dev);
 805                child = func->dev->subordinate;
 806                if (child)
 807                        pci_bus_add_devices(child);
 808        }
 809
 810 out:
 811        pci_unlock_rescan_remove();
 812        return 0;
 813}
 814
 815/*******************************************************
 816 * Returns whether the bus is empty or not
 817 *******************************************************/
 818static int is_bus_empty(struct slot *slot_cur)
 819{
 820        int rc;
 821        struct slot *tmp_slot;
 822        u8 i = slot_cur->bus_on->slot_min;
 823
 824        while (i <= slot_cur->bus_on->slot_max) {
 825                if (i == slot_cur->number) {
 826                        i++;
 827                        continue;
 828                }
 829                tmp_slot = ibmphp_get_slot_from_physical_num(i);
 830                if (!tmp_slot)
 831                        return 0;
 832                rc = slot_update(&tmp_slot);
 833                if (rc)
 834                        return 0;
 835                if (SLOT_PRESENT(tmp_slot->status) &&
 836                                        SLOT_PWRGD(tmp_slot->status))
 837                        return 0;
 838                i++;
 839        }
 840        return 1;
 841}
 842
 843/***********************************************************
 844 * If the HPC permits and the bus currently empty, tries to set the
 845 * bus speed and mode at the maximum card and bus capability
 846 * Parameters: slot
 847 * Returns: bus is set (0) or error code
 848 ***********************************************************/
 849static int set_bus(struct slot *slot_cur)
 850{
 851        int rc;
 852        u8 speed;
 853        u8 cmd = 0x0;
 854        int retval;
 855        static struct pci_device_id ciobx[] = {
 856                { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
 857                { },
 858        };
 859
 860        debug("%s - entry slot # %d\n", __func__, slot_cur->number);
 861        if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
 862                rc = slot_update(&slot_cur);
 863                if (rc)
 864                        return rc;
 865                speed = SLOT_SPEED(slot_cur->ext_status);
 866                debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
 867                switch (speed) {
 868                case HPC_SLOT_SPEED_33:
 869                        cmd = HPC_BUS_33CONVMODE;
 870                        break;
 871                case HPC_SLOT_SPEED_66:
 872                        if (SLOT_PCIX(slot_cur->ext_status)) {
 873                                if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
 874                                                (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
 875                                        cmd = HPC_BUS_66PCIXMODE;
 876                                else if (!SLOT_BUS_MODE(slot_cur->ext_status))
 877                                        /* if max slot/bus capability is 66 pci
 878                                        and there's no bus mode mismatch, then
 879                                        the adapter supports 66 pci */
 880                                        cmd = HPC_BUS_66CONVMODE;
 881                                else
 882                                        cmd = HPC_BUS_33CONVMODE;
 883                        } else {
 884                                if (slot_cur->supported_speed >= BUS_SPEED_66)
 885                                        cmd = HPC_BUS_66CONVMODE;
 886                                else
 887                                        cmd = HPC_BUS_33CONVMODE;
 888                        }
 889                        break;
 890                case HPC_SLOT_SPEED_133:
 891                        switch (slot_cur->supported_speed) {
 892                        case BUS_SPEED_33:
 893                                cmd = HPC_BUS_33CONVMODE;
 894                                break;
 895                        case BUS_SPEED_66:
 896                                if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
 897                                        cmd = HPC_BUS_66PCIXMODE;
 898                                else
 899                                        cmd = HPC_BUS_66CONVMODE;
 900                                break;
 901                        case BUS_SPEED_100:
 902                                cmd = HPC_BUS_100PCIXMODE;
 903                                break;
 904                        case BUS_SPEED_133:
 905                                /* This is to take care of the bug in CIOBX chip */
 906                                if (pci_dev_present(ciobx))
 907                                        ibmphp_hpc_writeslot(slot_cur,
 908                                                        HPC_BUS_100PCIXMODE);
 909                                cmd = HPC_BUS_133PCIXMODE;
 910                                break;
 911                        default:
 912                                err("Wrong bus speed\n");
 913                                return -ENODEV;
 914                        }
 915                        break;
 916                default:
 917                        err("wrong slot speed\n");
 918                        return -ENODEV;
 919                }
 920                debug("setting bus speed for slot %d, cmd %x\n",
 921                                                slot_cur->number, cmd);
 922                retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 923                if (retval) {
 924                        err("setting bus speed failed\n");
 925                        return retval;
 926                }
 927                if (CTLR_RESULT(slot_cur->ctrl->status)) {
 928                        err("command not completed successfully in set_bus\n");
 929                        return -EIO;
 930                }
 931        }
 932        /* This is for x440, once Brandon fixes the firmware,
 933        will not need this delay */
 934        msleep(1000);
 935        debug("%s -Exit\n", __func__);
 936        return 0;
 937}
 938
 939/* This routine checks the bus limitations that the slot is on from the BIOS.
 940 * This is used in deciding whether or not to power up the slot.
 941 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
 942 * same bus)
 943 * Parameters: slot
 944 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
 945 */
 946static int check_limitations(struct slot *slot_cur)
 947{
 948        u8 i;
 949        struct slot *tmp_slot;
 950        u8 count = 0;
 951        u8 limitation = 0;
 952
 953        for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
 954                tmp_slot = ibmphp_get_slot_from_physical_num(i);
 955                if (!tmp_slot)
 956                        return -ENODEV;
 957                if ((SLOT_PWRGD(tmp_slot->status)) &&
 958                                        !(SLOT_CONNECT(tmp_slot->status)))
 959                        count++;
 960        }
 961        get_cur_bus_info(&slot_cur);
 962        switch (slot_cur->bus_on->current_speed) {
 963        case BUS_SPEED_33:
 964                limitation = slot_cur->bus_on->slots_at_33_conv;
 965                break;
 966        case BUS_SPEED_66:
 967                if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
 968                        limitation = slot_cur->bus_on->slots_at_66_pcix;
 969                else
 970                        limitation = slot_cur->bus_on->slots_at_66_conv;
 971                break;
 972        case BUS_SPEED_100:
 973                limitation = slot_cur->bus_on->slots_at_100_pcix;
 974                break;
 975        case BUS_SPEED_133:
 976                limitation = slot_cur->bus_on->slots_at_133_pcix;
 977                break;
 978        }
 979
 980        if ((count + 1) > limitation)
 981                return -EINVAL;
 982        return 0;
 983}
 984
 985static inline void print_card_capability(struct slot *slot_cur)
 986{
 987        info("capability of the card is ");
 988        if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
 989                info("   133 MHz PCI-X\n");
 990        else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
 991                info("    66 MHz PCI-X\n");
 992        else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
 993                info("    66 MHz PCI\n");
 994        else
 995                info("    33 MHz PCI\n");
 996
 997}
 998
 999/* This routine will power on the slot, configure the device(s) and find the
1000 * drivers for them.
1001 * Parameters: hotplug_slot
1002 * Returns: 0 or failure codes
1003 */
1004static int enable_slot(struct hotplug_slot *hs)
1005{
1006        int rc, i, rcpr;
1007        struct slot *slot_cur;
1008        u8 function;
1009        struct pci_func *tmp_func;
1010
1011        ibmphp_lock_operations();
1012
1013        debug("ENABLING SLOT........\n");
1014        slot_cur = hs->private;
1015
1016        rc = validate(slot_cur, ENABLE);
1017        if (rc) {
1018                err("validate function failed\n");
1019                goto error_nopower;
1020        }
1021
1022        attn_LED_blink(slot_cur);
1023
1024        rc = set_bus(slot_cur);
1025        if (rc) {
1026                err("was not able to set the bus\n");
1027                goto error_nopower;
1028        }
1029
1030        /*-----------------debugging------------------------------*/
1031        get_cur_bus_info(&slot_cur);
1032        debug("the current bus speed right after set_bus = %x\n",
1033                                        slot_cur->bus_on->current_speed);
1034        /*----------------------------------------------------------*/
1035
1036        rc = check_limitations(slot_cur);
1037        if (rc) {
1038                err("Adding this card exceeds the limitations of this bus.\n");
1039                err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1040                err("Try hot-adding into another bus\n");
1041                rc = -EINVAL;
1042                goto error_nopower;
1043        }
1044
1045        rc = power_on(slot_cur);
1046
1047        if (rc) {
1048                err("something wrong when powering up... please see below for details\n");
1049                /* need to turn off before on, otherwise, blinking overwrites */
1050                attn_off(slot_cur);
1051                attn_on(slot_cur);
1052                if (slot_update(&slot_cur)) {
1053                        attn_off(slot_cur);
1054                        attn_on(slot_cur);
1055                        rc = -ENODEV;
1056                        goto exit;
1057                }
1058                /* Check to see the error of why it failed */
1059                if ((SLOT_POWER(slot_cur->status)) &&
1060                                        !(SLOT_PWRGD(slot_cur->status)))
1061                        err("power fault occurred trying to power up\n");
1062                else if (SLOT_BUS_SPEED(slot_cur->status)) {
1063                        err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1064                        print_card_capability(slot_cur);
1065                } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1066                        err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1067                        print_card_capability(slot_cur);
1068                }
1069                ibmphp_update_slot_info(slot_cur);
1070                goto exit;
1071        }
1072        debug("after power_on\n");
1073        /*-----------------------debugging---------------------------*/
1074        get_cur_bus_info(&slot_cur);
1075        debug("the current bus speed right after power_on = %x\n",
1076                                        slot_cur->bus_on->current_speed);
1077        /*----------------------------------------------------------*/
1078
1079        rc = slot_update(&slot_cur);
1080        if (rc)
1081                goto error_power;
1082
1083        rc = -EINVAL;
1084        if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1085                err("power fault occurred trying to power up...\n");
1086                goto error_power;
1087        }
1088        if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1089                err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1090                print_card_capability(slot_cur);
1091                goto error_power;
1092        }
1093        /* Don't think this case will happen after above checks...
1094         * but just in case, for paranoia sake */
1095        if (!(SLOT_POWER(slot_cur->status))) {
1096                err("power on failed...\n");
1097                goto error_power;
1098        }
1099
1100        slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1101        if (!slot_cur->func) {
1102                /* We cannot do update_slot_info here, since no memory for
1103                 * kmalloc n.e.ways, and update_slot_info allocates some */
1104                err("out of system memory\n");
1105                rc = -ENOMEM;
1106                goto error_power;
1107        }
1108        slot_cur->func->busno = slot_cur->bus;
1109        slot_cur->func->device = slot_cur->device;
1110        for (i = 0; i < 4; i++)
1111                slot_cur->func->irq[i] = slot_cur->irq[i];
1112
1113        debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1114                                        slot_cur->bus, slot_cur->device);
1115
1116        if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1117                err("configure_card was unsuccessful...\n");
1118                /* true because don't need to actually deallocate resources,
1119                 * just remove references */
1120                ibmphp_unconfigure_card(&slot_cur, 1);
1121                debug("after unconfigure_card\n");
1122                slot_cur->func = NULL;
1123                rc = -ENOMEM;
1124                goto error_power;
1125        }
1126
1127        function = 0x00;
1128        do {
1129                tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1130                                                        function++);
1131                if (tmp_func && !(tmp_func->dev))
1132                        ibm_configure_device(tmp_func);
1133        } while (tmp_func);
1134
1135        attn_off(slot_cur);
1136        if (slot_update(&slot_cur)) {
1137                rc = -EFAULT;
1138                goto exit;
1139        }
1140        ibmphp_print_test();
1141        rc = ibmphp_update_slot_info(slot_cur);
1142exit:
1143        ibmphp_unlock_operations();
1144        return rc;
1145
1146error_nopower:
1147        attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1148        attn_on(slot_cur);
1149error_cont:
1150        rcpr = slot_update(&slot_cur);
1151        if (rcpr) {
1152                rc = rcpr;
1153                goto exit;
1154        }
1155        ibmphp_update_slot_info(slot_cur);
1156        goto exit;
1157
1158error_power:
1159        attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1160        attn_on(slot_cur);
1161        rcpr = power_off(slot_cur);
1162        if (rcpr) {
1163                rc = rcpr;
1164                goto exit;
1165        }
1166        goto error_cont;
1167}
1168
1169/**************************************************************
1170* HOT REMOVING ADAPTER CARD                                   *
1171* INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1172* OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1173*               DISABLE POWER ,                               *
1174**************************************************************/
1175static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1176{
1177        struct slot *slot = hotplug_slot->private;
1178        int rc;
1179
1180        ibmphp_lock_operations();
1181        rc = ibmphp_do_disable_slot(slot);
1182        ibmphp_unlock_operations();
1183        return rc;
1184}
1185
1186int ibmphp_do_disable_slot(struct slot *slot_cur)
1187{
1188        int rc;
1189        u8 flag;
1190
1191        debug("DISABLING SLOT...\n");
1192
1193        if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1194                return -ENODEV;
1195
1196        flag = slot_cur->flag;
1197        slot_cur->flag = 1;
1198
1199        if (flag == 1) {
1200                rc = validate(slot_cur, DISABLE);
1201                        /* checking if powered off already & valid slot # */
1202                if (rc)
1203                        goto error;
1204        }
1205        attn_LED_blink(slot_cur);
1206
1207        if (slot_cur->func == NULL) {
1208                /* We need this for functions that were there on bootup */
1209                slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1210                if (!slot_cur->func) {
1211                        err("out of system memory\n");
1212                        rc = -ENOMEM;
1213                        goto error;
1214                }
1215                slot_cur->func->busno = slot_cur->bus;
1216                slot_cur->func->device = slot_cur->device;
1217        }
1218
1219        ibm_unconfigure_device(slot_cur->func);
1220
1221        /*
1222         * If we got here from latch suddenly opening on operating card or
1223         * a power fault, there's no power to the card, so cannot
1224         * read from it to determine what resources it occupied.  This operation
1225         * is forbidden anyhow.  The best we can do is remove it from kernel
1226         * lists at least */
1227
1228        if (!flag) {
1229                attn_off(slot_cur);
1230                return 0;
1231        }
1232
1233        rc = ibmphp_unconfigure_card(&slot_cur, 0);
1234        slot_cur->func = NULL;
1235        debug("in disable_slot. after unconfigure_card\n");
1236        if (rc) {
1237                err("could not unconfigure card.\n");
1238                goto error;
1239        }
1240
1241        rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1242        if (rc)
1243                goto error;
1244
1245        attn_off(slot_cur);
1246        rc = slot_update(&slot_cur);
1247        if (rc)
1248                goto exit;
1249
1250        rc = ibmphp_update_slot_info(slot_cur);
1251        ibmphp_print_test();
1252exit:
1253        return rc;
1254
1255error:
1256        /*  Need to turn off if was blinking b4 */
1257        attn_off(slot_cur);
1258        attn_on(slot_cur);
1259        if (slot_update(&slot_cur)) {
1260                rc = -EFAULT;
1261                goto exit;
1262        }
1263        if (flag)
1264                ibmphp_update_slot_info(slot_cur);
1265        goto exit;
1266}
1267
1268struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1269        .set_attention_status =         set_attention_status,
1270        .enable_slot =                  enable_slot,
1271        .disable_slot =                 ibmphp_disable_slot,
1272        .hardware_test =                NULL,
1273        .get_power_status =             get_power_status,
1274        .get_attention_status =         get_attention_status,
1275        .get_latch_status =             get_latch_status,
1276        .get_adapter_status =           get_adapter_present,
1277/*      .get_max_adapter_speed =        get_max_adapter_speed,
1278        .get_bus_name_status =          get_bus_name,
1279*/
1280};
1281
1282static void ibmphp_unload(void)
1283{
1284        free_slots();
1285        debug("after slots\n");
1286        ibmphp_free_resources();
1287        debug("after resources\n");
1288        ibmphp_free_bus_info_queue();
1289        debug("after bus info\n");
1290        ibmphp_free_ebda_hpc_queue();
1291        debug("after ebda hpc\n");
1292        ibmphp_free_ebda_pci_rsrc_queue();
1293        debug("after ebda pci rsrc\n");
1294        kfree(ibmphp_pci_bus);
1295}
1296
1297static int __init ibmphp_init(void)
1298{
1299        struct pci_bus *bus;
1300        int i = 0;
1301        int rc = 0;
1302
1303        init_flag = 1;
1304
1305        info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1306
1307        ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1308        if (!ibmphp_pci_bus) {
1309                err("out of memory\n");
1310                rc = -ENOMEM;
1311                goto exit;
1312        }
1313
1314        bus = pci_find_bus(0, 0);
1315        if (!bus) {
1316                err("Can't find the root pci bus, can not continue\n");
1317                rc = -ENODEV;
1318                goto error;
1319        }
1320        memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1321
1322        ibmphp_debug = debug;
1323
1324        ibmphp_hpc_initvars();
1325
1326        for (i = 0; i < 16; i++)
1327                irqs[i] = 0;
1328
1329        rc = ibmphp_access_ebda();
1330        if (rc)
1331                goto error;
1332        debug("after ibmphp_access_ebda()\n");
1333
1334        rc = ibmphp_rsrc_init();
1335        if (rc)
1336                goto error;
1337        debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1338
1339        max_slots = get_max_slots();
1340
1341        rc = ibmphp_register_pci();
1342        if (rc)
1343                goto error;
1344
1345        if (init_ops()) {
1346                rc = -ENODEV;
1347                goto error;
1348        }
1349
1350        ibmphp_print_test();
1351        rc = ibmphp_hpc_start_poll_thread();
1352        if (rc)
1353                goto error;
1354
1355exit:
1356        return rc;
1357
1358error:
1359        ibmphp_unload();
1360        goto exit;
1361}
1362
1363static void __exit ibmphp_exit(void)
1364{
1365        ibmphp_hpc_stop_poll_thread();
1366        debug("after polling\n");
1367        ibmphp_unload();
1368        debug("done\n");
1369}
1370
1371module_init(ibmphp_init);
1372module_exit(ibmphp_exit);
1373
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