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 "ibmphp.h"
  40
  41#define attn_on(sl)  ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
  42#define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
  43#define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
  44#define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
  45#define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
  46
  47#define DRIVER_VERSION  "0.6"
  48#define DRIVER_DESC     "IBM Hot Plug PCI Controller Driver"
  49
  50int ibmphp_debug;
  51
  52static bool debug;
  53module_param(debug, bool, S_IRUGO | S_IWUSR);
  54MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  55MODULE_LICENSE("GPL");
  56MODULE_DESCRIPTION(DRIVER_DESC);
  57
  58struct pci_bus *ibmphp_pci_bus;
  59static int max_slots;
  60
  61static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
  62                         * tables don't provide default info for empty slots */
  63
  64static int init_flag;
  65
  66/*
  67static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
  68
  69static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
  70{
  71        return get_max_adapter_speed_1 (hs, value, 1);
  72}
  73*/
  74static inline int get_cur_bus_info(struct slot **sl)
  75{
  76        int rc = 1;
  77        struct slot *slot_cur = *sl;
  78
  79        debug("options = %x\n", slot_cur->ctrl->options);
  80        debug("revision = %x\n", slot_cur->ctrl->revision);
  81
  82        if (READ_BUS_STATUS(slot_cur->ctrl))
  83                rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
  84
  85        if (rc)
  86                return rc;
  87
  88        slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
  89        if (READ_BUS_MODE(slot_cur->ctrl))
  90                slot_cur->bus_on->current_bus_mode =
  91                                CURRENT_BUS_MODE(slot_cur->busstatus);
  92        else
  93                slot_cur->bus_on->current_bus_mode = 0xFF;
  94
  95        debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
  96                        slot_cur->busstatus,
  97                        slot_cur->bus_on->current_speed,
  98                        slot_cur->bus_on->current_bus_mode);
  99
 100        *sl = slot_cur;
 101        return 0;
 102}
 103
 104static inline int slot_update(struct slot **sl)
 105{
 106        int rc;
 107        rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
 108        if (rc)
 109                return rc;
 110        if (!init_flag)
 111                rc = get_cur_bus_info(sl);
 112        return rc;
 113}
 114
 115static int __init get_max_slots(void)
 116{
 117        struct slot *slot_cur;
 118        struct list_head *tmp;
 119        u8 slot_count = 0;
 120
 121        list_for_each(tmp, &ibmphp_slot_head) {
 122                slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
 123                /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
 124                slot_count = max(slot_count, slot_cur->number);
 125        }
 126        return slot_count;
 127}
 128
 129/* This routine will put the correct slot->device information per slot.  It's
 130 * called from initialization of the slot structures. It will also assign
 131 * interrupt numbers per each slot.
 132 * Parameters: struct slot
 133 * Returns 0 or errors
 134 */
 135int ibmphp_init_devno(struct slot **cur_slot)
 136{
 137        struct irq_routing_table *rtable;
 138        int len;
 139        int loop;
 140        int i;
 141
 142        rtable = pcibios_get_irq_routing_table();
 143        if (!rtable) {
 144                err("no BIOS routing table...\n");
 145                return -ENOMEM;
 146        }
 147
 148        len = (rtable->size - sizeof(struct irq_routing_table)) /
 149                        sizeof(struct irq_info);
 150
 151        if (!len) {
 152                kfree(rtable);
 153                return -1;
 154        }
 155        for (loop = 0; loop < len; loop++) {
 156                if ((*cur_slot)->number == rtable->slots[loop].slot &&
 157                    (*cur_slot)->bus == rtable->slots[loop].bus) {
 158                        struct io_apic_irq_attr irq_attr;
 159
 160                        (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
 161                        for (i = 0; i < 4; i++)
 162                                (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
 163                                                (int) (*cur_slot)->device, i,
 164                                                &irq_attr);
 165
 166                        debug("(*cur_slot)->irq[0] = %x\n",
 167                                        (*cur_slot)->irq[0]);
 168                        debug("(*cur_slot)->irq[1] = %x\n",
 169                                        (*cur_slot)->irq[1]);
 170                        debug("(*cur_slot)->irq[2] = %x\n",
 171                                        (*cur_slot)->irq[2]);
 172                        debug("(*cur_slot)->irq[3] = %x\n",
 173                                        (*cur_slot)->irq[3]);
 174
 175                        debug("rtable->exclusive_irqs = %x\n",
 176                                        rtable->exclusive_irqs);
 177                        debug("rtable->slots[loop].irq[0].bitmap = %x\n",
 178                                        rtable->slots[loop].irq[0].bitmap);
 179                        debug("rtable->slots[loop].irq[1].bitmap = %x\n",
 180                                        rtable->slots[loop].irq[1].bitmap);
 181                        debug("rtable->slots[loop].irq[2].bitmap = %x\n",
 182                                        rtable->slots[loop].irq[2].bitmap);
 183                        debug("rtable->slots[loop].irq[3].bitmap = %x\n",
 184                                        rtable->slots[loop].irq[3].bitmap);
 185
 186                        debug("rtable->slots[loop].irq[0].link = %x\n",
 187                                        rtable->slots[loop].irq[0].link);
 188                        debug("rtable->slots[loop].irq[1].link = %x\n",
 189                                        rtable->slots[loop].irq[1].link);
 190                        debug("rtable->slots[loop].irq[2].link = %x\n",
 191                                        rtable->slots[loop].irq[2].link);
 192                        debug("rtable->slots[loop].irq[3].link = %x\n",
 193                                        rtable->slots[loop].irq[3].link);
 194                        debug("end of init_devno\n");
 195                        kfree(rtable);
 196                        return 0;
 197                }
 198        }
 199
 200        kfree(rtable);
 201        return -1;
 202}
 203
 204static inline int power_on(struct slot *slot_cur)
 205{
 206        u8 cmd = HPC_SLOT_ON;
 207        int retval;
 208
 209        retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 210        if (retval) {
 211                err("power on failed\n");
 212                return retval;
 213        }
 214        if (CTLR_RESULT(slot_cur->ctrl->status)) {
 215                err("command not completed successfully in power_on\n");
 216                return -EIO;
 217        }
 218        msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
 219        return 0;
 220}
 221
 222static inline int power_off(struct slot *slot_cur)
 223{
 224        u8 cmd = HPC_SLOT_OFF;
 225        int retval;
 226
 227        retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 228        if (retval) {
 229                err("power off failed\n");
 230                return retval;
 231        }
 232        if (CTLR_RESULT(slot_cur->ctrl->status)) {
 233                err("command not completed successfully in power_off\n");
 234                retval = -EIO;
 235        }
 236        return retval;
 237}
 238
 239static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
 240{
 241        int rc = 0;
 242        struct slot *pslot;
 243        u8 cmd = 0x00;     /* avoid compiler warning */
 244
 245        debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
 246                        (ulong) hotplug_slot, value);
 247        ibmphp_lock_operations();
 248
 249
 250        if (hotplug_slot) {
 251                switch (value) {
 252                case HPC_SLOT_ATTN_OFF:
 253                        cmd = HPC_SLOT_ATTNOFF;
 254                        break;
 255                case HPC_SLOT_ATTN_ON:
 256                        cmd = HPC_SLOT_ATTNON;
 257                        break;
 258                case HPC_SLOT_ATTN_BLINK:
 259                        cmd = HPC_SLOT_BLINKLED;
 260                        break;
 261                default:
 262                        rc = -ENODEV;
 263                        err("set_attention_status - Error : invalid input [%x]\n",
 264                                        value);
 265                        break;
 266                }
 267                if (rc == 0) {
 268                        pslot = hotplug_slot->private;
 269                        if (pslot)
 270                                rc = ibmphp_hpc_writeslot(pslot, cmd);
 271                        else
 272                                rc = -ENODEV;
 273                }
 274        } else
 275                rc = -ENODEV;
 276
 277        ibmphp_unlock_operations();
 278
 279        debug("set_attention_status - Exit rc[%d]\n", rc);
 280        return rc;
 281}
 282
 283static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 284{
 285        int rc = -ENODEV;
 286        struct slot *pslot;
 287        struct slot myslot;
 288
 289        debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 290                                        (ulong) hotplug_slot, (ulong) value);
 291
 292        ibmphp_lock_operations();
 293        if (hotplug_slot) {
 294                pslot = hotplug_slot->private;
 295                if (pslot) {
 296                        memcpy(&myslot, pslot, sizeof(struct slot));
 297                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 298                                                &(myslot.status));
 299                        if (!rc)
 300                                rc = ibmphp_hpc_readslot(pslot,
 301                                                READ_EXTSLOTSTATUS,
 302                                                &(myslot.ext_status));
 303                        if (!rc)
 304                                *value = SLOT_ATTN(myslot.status,
 305                                                myslot.ext_status);
 306                }
 307        }
 308
 309        ibmphp_unlock_operations();
 310        debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
 311        return rc;
 312}
 313
 314static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 315{
 316        int rc = -ENODEV;
 317        struct slot *pslot;
 318        struct slot myslot;
 319
 320        debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 321                                        (ulong) hotplug_slot, (ulong) value);
 322        ibmphp_lock_operations();
 323        if (hotplug_slot) {
 324                pslot = hotplug_slot->private;
 325                if (pslot) {
 326                        memcpy(&myslot, pslot, sizeof(struct slot));
 327                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 328                                                &(myslot.status));
 329                        if (!rc)
 330                                *value = SLOT_LATCH(myslot.status);
 331                }
 332        }
 333
 334        ibmphp_unlock_operations();
 335        debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
 336                        rc, rc, *value);
 337        return rc;
 338}
 339
 340
 341static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 342{
 343        int rc = -ENODEV;
 344        struct slot *pslot;
 345        struct slot myslot;
 346
 347        debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 348                                        (ulong) hotplug_slot, (ulong) value);
 349        ibmphp_lock_operations();
 350        if (hotplug_slot) {
 351                pslot = hotplug_slot->private;
 352                if (pslot) {
 353                        memcpy(&myslot, pslot, sizeof(struct slot));
 354                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 355                                                &(myslot.status));
 356                        if (!rc)
 357                                *value = SLOT_PWRGD(myslot.status);
 358                }
 359        }
 360
 361        ibmphp_unlock_operations();
 362        debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
 363                        rc, rc, *value);
 364        return rc;
 365}
 366
 367static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
 368{
 369        int rc = -ENODEV;
 370        struct slot *pslot;
 371        u8 present;
 372        struct slot myslot;
 373
 374        debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 375                                        (ulong) hotplug_slot, (ulong) value);
 376        ibmphp_lock_operations();
 377        if (hotplug_slot) {
 378                pslot = hotplug_slot->private;
 379                if (pslot) {
 380                        memcpy(&myslot, pslot, sizeof(struct slot));
 381                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 382                                                &(myslot.status));
 383                        if (!rc) {
 384                                present = SLOT_PRESENT(myslot.status);
 385                                if (present == HPC_SLOT_EMPTY)
 386                                        *value = 0;
 387                                else
 388                                        *value = 1;
 389                        }
 390                }
 391        }
 392
 393        ibmphp_unlock_operations();
 394        debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
 395        return rc;
 396}
 397
 398static int get_max_bus_speed(struct slot *slot)
 399{
 400        int rc;
 401        u8 mode = 0;
 402        enum pci_bus_speed speed;
 403        struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
 404
 405        debug("%s - Entry slot[%p]\n", __func__, slot);
 406
 407        ibmphp_lock_operations();
 408        mode = slot->supported_bus_mode;
 409        speed = slot->supported_speed;
 410        ibmphp_unlock_operations();
 411
 412        switch (speed) {
 413        case BUS_SPEED_33:
 414                break;
 415        case BUS_SPEED_66:
 416                if (mode == BUS_MODE_PCIX)
 417                        speed += 0x01;
 418                break;
 419        case BUS_SPEED_100:
 420        case BUS_SPEED_133:
 421                speed += 0x01;
 422                break;
 423        default:
 424                /* Note (will need to change): there would be soon 256, 512 also */
 425                rc = -ENODEV;
 426        }
 427
 428        if (!rc)
 429                bus->max_bus_speed = speed;
 430
 431        debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
 432        return rc;
 433}
 434
 435/*
 436static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
 437{
 438        int rc = -ENODEV;
 439        struct slot *pslot;
 440        struct slot myslot;
 441
 442        debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 443                                                (ulong)hotplug_slot, (ulong) value);
 444
 445        if (flag)
 446                ibmphp_lock_operations();
 447
 448        if (hotplug_slot && value) {
 449                pslot = hotplug_slot->private;
 450                if (pslot) {
 451                        memcpy(&myslot, pslot, sizeof(struct slot));
 452                        rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 453                                                &(myslot.status));
 454
 455                        if (!(SLOT_LATCH (myslot.status)) &&
 456                                        (SLOT_PRESENT (myslot.status))) {
 457                                rc = ibmphp_hpc_readslot(pslot,
 458                                                READ_EXTSLOTSTATUS,
 459                                                &(myslot.ext_status));
 460                                if (!rc)
 461                                        *value = SLOT_SPEED(myslot.ext_status);
 462                        } else
 463                                *value = MAX_ADAPTER_NONE;
 464                }
 465        }
 466
 467        if (flag)
 468                ibmphp_unlock_operations();
 469
 470        debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
 471        return rc;
 472}
 473
 474static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
 475{
 476        int rc = -ENODEV;
 477        struct slot *pslot = NULL;
 478
 479        debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
 480
 481        ibmphp_lock_operations();
 482
 483        if (hotplug_slot) {
 484                pslot = hotplug_slot->private;
 485                if (pslot) {
 486                        rc = 0;
 487                        snprintf(value, 100, "Bus %x", pslot->bus);
 488                }
 489        } else
 490                rc = -ENODEV;
 491
 492        ibmphp_unlock_operations();
 493        debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
 494        return rc;
 495}
 496*/
 497
 498/****************************************************************************
 499 * This routine will initialize the ops data structure used in the validate
 500 * function. It will also power off empty slots that are powered on since BIOS
 501 * leaves those on, albeit disconnected
 502 ****************************************************************************/
 503static int __init init_ops(void)
 504{
 505        struct slot *slot_cur;
 506        struct list_head *tmp;
 507        int retval;
 508        int rc;
 509
 510        list_for_each(tmp, &ibmphp_slot_head) {
 511                slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
 512
 513                if (!slot_cur)
 514                        return -ENODEV;
 515
 516                debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
 517                                                        slot_cur->number);
 518                if (slot_cur->ctrl->revision == 0xFF)
 519                        if (get_ctrl_revision(slot_cur,
 520                                                &slot_cur->ctrl->revision))
 521                                return -1;
 522
 523                if (slot_cur->bus_on->current_speed == 0xFF)
 524                        if (get_cur_bus_info(&slot_cur))
 525                                return -1;
 526                get_max_bus_speed(slot_cur);
 527
 528                if (slot_cur->ctrl->options == 0xFF)
 529                        if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
 530                                return -1;
 531
 532                retval = slot_update(&slot_cur);
 533                if (retval)
 534                        return retval;
 535
 536                debug("status = %x\n", slot_cur->status);
 537                debug("ext_status = %x\n", slot_cur->ext_status);
 538                debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
 539                debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
 540                debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
 541
 542                if ((SLOT_PWRGD(slot_cur->status)) &&
 543                    !(SLOT_PRESENT(slot_cur->status)) &&
 544                    !(SLOT_LATCH(slot_cur->status))) {
 545                        debug("BEFORE POWER OFF COMMAND\n");
 546                                rc = power_off(slot_cur);
 547                                if (rc)
 548                                        return rc;
 549
 550        /*              retval = slot_update(&slot_cur);
 551         *              if (retval)
 552         *                      return retval;
 553         *              ibmphp_update_slot_info(slot_cur);
 554         */
 555                }
 556        }
 557        init_flag = 0;
 558        return 0;
 559}
 560
 561/* This operation will check whether the slot is within the bounds and
 562 * the operation is valid to perform on that slot
 563 * Parameters: slot, operation
 564 * Returns: 0 or error codes
 565 */
 566static int validate(struct slot *slot_cur, int opn)
 567{
 568        int number;
 569        int retval;
 570
 571        if (!slot_cur)
 572                return -ENODEV;
 573        number = slot_cur->number;
 574        if ((number > max_slots) || (number < 0))
 575                return -EBADSLT;
 576        debug("slot_number in validate is %d\n", slot_cur->number);
 577
 578        retval = slot_update(&slot_cur);
 579        if (retval)
 580                return retval;
 581
 582        switch (opn) {
 583                case ENABLE:
 584                        if (!(SLOT_PWRGD(slot_cur->status)) &&
 585                             (SLOT_PRESENT(slot_cur->status)) &&
 586                             !(SLOT_LATCH(slot_cur->status)))
 587                                return 0;
 588                        break;
 589                case DISABLE:
 590                        if ((SLOT_PWRGD(slot_cur->status)) &&
 591                            (SLOT_PRESENT(slot_cur->status)) &&
 592                            !(SLOT_LATCH(slot_cur->status)))
 593                                return 0;
 594                        break;
 595                default:
 596                        break;
 597        }
 598        err("validate failed....\n");
 599        return -EINVAL;
 600}
 601
 602/****************************************************************************
 603 * This routine is for updating the data structures in the hotplug core
 604 * Parameters: struct slot
 605 * Returns: 0 or error
 606 ****************************************************************************/
 607int ibmphp_update_slot_info(struct slot *slot_cur)
 608{
 609        struct hotplug_slot_info *info;
 610        struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
 611        int rc;
 612        u8 bus_speed;
 613        u8 mode;
 614
 615        info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 616        if (!info) {
 617                err("out of system memory\n");
 618                return -ENOMEM;
 619        }
 620
 621        info->power_status = SLOT_PWRGD(slot_cur->status);
 622        info->attention_status = SLOT_ATTN(slot_cur->status,
 623                                                slot_cur->ext_status);
 624        info->latch_status = SLOT_LATCH(slot_cur->status);
 625        if (!SLOT_PRESENT(slot_cur->status)) {
 626                info->adapter_status = 0;
 627/*              info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
 628        } else {
 629                info->adapter_status = 1;
 630/*              get_max_adapter_speed_1(slot_cur->hotplug_slot,
 631                                        &info->max_adapter_speed_status, 0); */
 632        }
 633
 634        bus_speed = slot_cur->bus_on->current_speed;
 635        mode = slot_cur->bus_on->current_bus_mode;
 636
 637        switch (bus_speed) {
 638                case BUS_SPEED_33:
 639                        break;
 640                case BUS_SPEED_66:
 641                        if (mode == BUS_MODE_PCIX)
 642                                bus_speed += 0x01;
 643                        else if (mode == BUS_MODE_PCI)
 644                                ;
 645                        else
 646                                bus_speed = PCI_SPEED_UNKNOWN;
 647                        break;
 648                case BUS_SPEED_100:
 649                case BUS_SPEED_133:
 650                        bus_speed += 0x01;
 651                        break;
 652                default:
 653                        bus_speed = PCI_SPEED_UNKNOWN;
 654        }
 655
 656        bus->cur_bus_speed = bus_speed;
 657        // To do: bus_names
 658
 659        rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
 660        kfree(info);
 661        return rc;
 662}
 663
 664
 665/******************************************************************************
 666 * This function will return the pci_func, given bus and devfunc, or NULL.  It
 667 * is called from visit routines
 668 ******************************************************************************/
 669
 670static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
 671{
 672        struct pci_func *func_cur;
 673        struct slot *slot_cur;
 674        struct list_head *tmp;
 675        list_for_each(tmp, &ibmphp_slot_head) {
 676                slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
 677                if (slot_cur->func) {
 678                        func_cur = slot_cur->func;
 679                        while (func_cur) {
 680                                if ((func_cur->busno == busno) &&
 681                                                (func_cur->device == device) &&
 682                                                (func_cur->function == function))
 683                                        return func_cur;
 684                                func_cur = func_cur->next;
 685                        }
 686                }
 687        }
 688        return NULL;
 689}
 690
 691/*************************************************************
 692 * This routine frees up memory used by struct slot, including
 693 * the pointers to pci_func, bus, hotplug_slot, controller,
 694 * and deregistering from the hotplug core
 695 *************************************************************/
 696static void free_slots(void)
 697{
 698        struct slot *slot_cur;
 699        struct list_head *tmp;
 700        struct list_head *next;
 701
 702        debug("%s -- enter\n", __func__);
 703
 704        list_for_each_safe(tmp, next, &ibmphp_slot_head) {
 705                slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
 706                pci_hp_deregister(slot_cur->hotplug_slot);
 707        }
 708        debug("%s -- exit\n", __func__);
 709}
 710
 711static void ibm_unconfigure_device(struct pci_func *func)
 712{
 713        struct pci_dev *temp;
 714        u8 j;
 715
 716        debug("inside %s\n", __func__);
 717        debug("func->device = %x, func->function = %x\n",
 718                                        func->device, func->function);
 719        debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
 720
 721        pci_lock_rescan_remove();
 722
 723        for (j = 0; j < 0x08; j++) {
 724                temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
 725                if (temp) {
 726                        pci_stop_and_remove_bus_device(temp);
 727                        pci_dev_put(temp);
 728                }
 729        }
 730
 731        pci_dev_put(func->dev);
 732
 733        pci_unlock_rescan_remove();
 734}
 735
 736/*
 737 * The following function is to fix kernel bug regarding
 738 * getting bus entries, here we manually add those primary
 739 * bus entries to kernel bus structure whenever apply
 740 */
 741static u8 bus_structure_fixup(u8 busno)
 742{
 743        struct pci_bus *bus, *b;
 744        struct pci_dev *dev;
 745        u16 l;
 746
 747        if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
 748                return 1;
 749
 750        bus = kmalloc(sizeof(*bus), GFP_KERNEL);
 751        if (!bus) {
 752                err("%s - out of memory\n", __func__);
 753                return 1;
 754        }
 755        dev = kmalloc(sizeof(*dev), GFP_KERNEL);
 756        if (!dev) {
 757                kfree(bus);
 758                err("%s - out of memory\n", __func__);
 759                return 1;
 760        }
 761
 762        bus->number = busno;
 763        bus->ops = ibmphp_pci_bus->ops;
 764        dev->bus = bus;
 765        for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
 766                if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
 767                                        (l != 0x0000) && (l != 0xffff)) {
 768                        debug("%s - Inside bus_structure_fixup()\n",
 769                                                        __func__);
 770                        b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
 771                        if (!b)
 772                                continue;
 773
 774                        pci_bus_add_devices(b);
 775                        break;
 776                }
 777        }
 778
 779        kfree(dev);
 780        kfree(bus);
 781
 782        return 0;
 783}
 784
 785static int ibm_configure_device(struct pci_func *func)
 786{
 787        struct pci_bus *child;
 788        int num;
 789        int flag = 0;   /* this is to make sure we don't double scan the bus,
 790                                        for bridged devices primarily */
 791
 792        pci_lock_rescan_remove();
 793
 794        if (!(bus_structure_fixup(func->busno)))
 795                flag = 1;
 796        if (func->dev == NULL)
 797                func->dev = pci_get_bus_and_slot(func->busno,
 798                                PCI_DEVFN(func->device, func->function));
 799
 800        if (func->dev == NULL) {
 801                struct pci_bus *bus = pci_find_bus(0, func->busno);
 802                if (!bus)
 803                        goto out;
 804
 805                num = pci_scan_slot(bus,
 806                                PCI_DEVFN(func->device, func->function));
 807                if (num)
 808                        pci_bus_add_devices(bus);
 809
 810                func->dev = pci_get_bus_and_slot(func->busno,
 811                                PCI_DEVFN(func->device, func->function));
 812                if (func->dev == NULL) {
 813                        err("ERROR... : pci_dev still NULL\n");
 814                        goto out;
 815                }
 816        }
 817        if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
 818                pci_hp_add_bridge(func->dev);
 819                child = func->dev->subordinate;
 820                if (child)
 821                        pci_bus_add_devices(child);
 822        }
 823
 824 out:
 825        pci_unlock_rescan_remove();
 826        return 0;
 827}
 828
 829/*******************************************************
 830 * Returns whether the bus is empty or not
 831 *******************************************************/
 832static int is_bus_empty(struct slot *slot_cur)
 833{
 834        int rc;
 835        struct slot *tmp_slot;
 836        u8 i = slot_cur->bus_on->slot_min;
 837
 838        while (i <= slot_cur->bus_on->slot_max) {
 839                if (i == slot_cur->number) {
 840                        i++;
 841                        continue;
 842                }
 843                tmp_slot = ibmphp_get_slot_from_physical_num(i);
 844                if (!tmp_slot)
 845                        return 0;
 846                rc = slot_update(&tmp_slot);
 847                if (rc)
 848                        return 0;
 849                if (SLOT_PRESENT(tmp_slot->status) &&
 850                                        SLOT_PWRGD(tmp_slot->status))
 851                        return 0;
 852                i++;
 853        }
 854        return 1;
 855}
 856
 857/***********************************************************
 858 * If the HPC permits and the bus currently empty, tries to set the
 859 * bus speed and mode at the maximum card and bus capability
 860 * Parameters: slot
 861 * Returns: bus is set (0) or error code
 862 ***********************************************************/
 863static int set_bus(struct slot *slot_cur)
 864{
 865        int rc;
 866        u8 speed;
 867        u8 cmd = 0x0;
 868        int retval;
 869        static struct pci_device_id ciobx[] = {
 870                { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
 871                { },
 872        };
 873
 874        debug("%s - entry slot # %d\n", __func__, slot_cur->number);
 875        if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
 876                rc = slot_update(&slot_cur);
 877                if (rc)
 878                        return rc;
 879                speed = SLOT_SPEED(slot_cur->ext_status);
 880                debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
 881                switch (speed) {
 882                case HPC_SLOT_SPEED_33:
 883                        cmd = HPC_BUS_33CONVMODE;
 884                        break;
 885                case HPC_SLOT_SPEED_66:
 886                        if (SLOT_PCIX(slot_cur->ext_status)) {
 887                                if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
 888                                                (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
 889                                        cmd = HPC_BUS_66PCIXMODE;
 890                                else if (!SLOT_BUS_MODE(slot_cur->ext_status))
 891                                        /* if max slot/bus capability is 66 pci
 892                                        and there's no bus mode mismatch, then
 893                                        the adapter supports 66 pci */
 894                                        cmd = HPC_BUS_66CONVMODE;
 895                                else
 896                                        cmd = HPC_BUS_33CONVMODE;
 897                        } else {
 898                                if (slot_cur->supported_speed >= BUS_SPEED_66)
 899                                        cmd = HPC_BUS_66CONVMODE;
 900                                else
 901                                        cmd = HPC_BUS_33CONVMODE;
 902                        }
 903                        break;
 904                case HPC_SLOT_SPEED_133:
 905                        switch (slot_cur->supported_speed) {
 906                        case BUS_SPEED_33:
 907                                cmd = HPC_BUS_33CONVMODE;
 908                                break;
 909                        case BUS_SPEED_66:
 910                                if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
 911                                        cmd = HPC_BUS_66PCIXMODE;
 912                                else
 913                                        cmd = HPC_BUS_66CONVMODE;
 914                                break;
 915                        case BUS_SPEED_100:
 916                                cmd = HPC_BUS_100PCIXMODE;
 917                                break;
 918                        case BUS_SPEED_133:
 919                                /* This is to take care of the bug in CIOBX chip */
 920                                if (pci_dev_present(ciobx))
 921                                        ibmphp_hpc_writeslot(slot_cur,
 922                                                        HPC_BUS_100PCIXMODE);
 923                                cmd = HPC_BUS_133PCIXMODE;
 924                                break;
 925                        default:
 926                                err("Wrong bus speed\n");
 927                                return -ENODEV;
 928                        }
 929                        break;
 930                default:
 931                        err("wrong slot speed\n");
 932                        return -ENODEV;
 933                }
 934                debug("setting bus speed for slot %d, cmd %x\n",
 935                                                slot_cur->number, cmd);
 936                retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 937                if (retval) {
 938                        err("setting bus speed failed\n");
 939                        return retval;
 940                }
 941                if (CTLR_RESULT(slot_cur->ctrl->status)) {
 942                        err("command not completed successfully in set_bus\n");
 943                        return -EIO;
 944                }
 945        }
 946        /* This is for x440, once Brandon fixes the firmware,
 947        will not need this delay */
 948        msleep(1000);
 949        debug("%s -Exit\n", __func__);
 950        return 0;
 951}
 952
 953/* This routine checks the bus limitations that the slot is on from the BIOS.
 954 * This is used in deciding whether or not to power up the slot.
 955 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
 956 * same bus)
 957 * Parameters: slot
 958 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
 959 */
 960static int check_limitations(struct slot *slot_cur)
 961{
 962        u8 i;
 963        struct slot *tmp_slot;
 964        u8 count = 0;
 965        u8 limitation = 0;
 966
 967        for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
 968                tmp_slot = ibmphp_get_slot_from_physical_num(i);
 969                if (!tmp_slot)
 970                        return -ENODEV;
 971                if ((SLOT_PWRGD(tmp_slot->status)) &&
 972                                        !(SLOT_CONNECT(tmp_slot->status)))
 973                        count++;
 974        }
 975        get_cur_bus_info(&slot_cur);
 976        switch (slot_cur->bus_on->current_speed) {
 977        case BUS_SPEED_33:
 978                limitation = slot_cur->bus_on->slots_at_33_conv;
 979                break;
 980        case BUS_SPEED_66:
 981                if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
 982                        limitation = slot_cur->bus_on->slots_at_66_pcix;
 983                else
 984                        limitation = slot_cur->bus_on->slots_at_66_conv;
 985                break;
 986        case BUS_SPEED_100:
 987                limitation = slot_cur->bus_on->slots_at_100_pcix;
 988                break;
 989        case BUS_SPEED_133:
 990                limitation = slot_cur->bus_on->slots_at_133_pcix;
 991                break;
 992        }
 993
 994        if ((count + 1) > limitation)
 995                return -EINVAL;
 996        return 0;
 997}
 998
 999static inline void print_card_capability(struct slot *slot_cur)
1000{
1001        info("capability of the card is ");
1002        if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
1003                info("   133 MHz PCI-X\n");
1004        else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
1005                info("    66 MHz PCI-X\n");
1006        else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1007                info("    66 MHz PCI\n");
1008        else
1009                info("    33 MHz PCI\n");
1010
1011}
1012
1013/* This routine will power on the slot, configure the device(s) and find the
1014 * drivers for them.
1015 * Parameters: hotplug_slot
1016 * Returns: 0 or failure codes
1017 */
1018static int enable_slot(struct hotplug_slot *hs)
1019{
1020        int rc, i, rcpr;
1021        struct slot *slot_cur;
1022        u8 function;
1023        struct pci_func *tmp_func;
1024
1025        ibmphp_lock_operations();
1026
1027        debug("ENABLING SLOT........\n");
1028        slot_cur = hs->private;
1029
1030        rc = validate(slot_cur, ENABLE);
1031        if (rc) {
1032                err("validate function failed\n");
1033                goto error_nopower;
1034        }
1035
1036        attn_LED_blink(slot_cur);
1037
1038        rc = set_bus(slot_cur);
1039        if (rc) {
1040                err("was not able to set the bus\n");
1041                goto error_nopower;
1042        }
1043
1044        /*-----------------debugging------------------------------*/
1045        get_cur_bus_info(&slot_cur);
1046        debug("the current bus speed right after set_bus = %x\n",
1047                                        slot_cur->bus_on->current_speed);
1048        /*----------------------------------------------------------*/
1049
1050        rc = check_limitations(slot_cur);
1051        if (rc) {
1052                err("Adding this card exceeds the limitations of this bus.\n");
1053                err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1054                err("Try hot-adding into another bus\n");
1055                rc = -EINVAL;
1056                goto error_nopower;
1057        }
1058
1059        rc = power_on(slot_cur);
1060
1061        if (rc) {
1062                err("something wrong when powering up... please see below for details\n");
1063                /* need to turn off before on, otherwise, blinking overwrites */
1064                attn_off(slot_cur);
1065                attn_on(slot_cur);
1066                if (slot_update(&slot_cur)) {
1067                        attn_off(slot_cur);
1068                        attn_on(slot_cur);
1069                        rc = -ENODEV;
1070                        goto exit;
1071                }
1072                /* Check to see the error of why it failed */
1073                if ((SLOT_POWER(slot_cur->status)) &&
1074                                        !(SLOT_PWRGD(slot_cur->status)))
1075                        err("power fault occurred trying to power up\n");
1076                else if (SLOT_BUS_SPEED(slot_cur->status)) {
1077                        err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1078                        print_card_capability(slot_cur);
1079                } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1080                        err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1081                        print_card_capability(slot_cur);
1082                }
1083                ibmphp_update_slot_info(slot_cur);
1084                goto exit;
1085        }
1086        debug("after power_on\n");
1087        /*-----------------------debugging---------------------------*/
1088        get_cur_bus_info(&slot_cur);
1089        debug("the current bus speed right after power_on = %x\n",
1090                                        slot_cur->bus_on->current_speed);
1091        /*----------------------------------------------------------*/
1092
1093        rc = slot_update(&slot_cur);
1094        if (rc)
1095                goto error_power;
1096
1097        rc = -EINVAL;
1098        if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1099                err("power fault occurred trying to power up...\n");
1100                goto error_power;
1101        }
1102        if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1103                err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1104                print_card_capability(slot_cur);
1105                goto error_power;
1106        }
1107        /* Don't think this case will happen after above checks...
1108         * but just in case, for paranoia sake */
1109        if (!(SLOT_POWER(slot_cur->status))) {
1110                err("power on failed...\n");
1111                goto error_power;
1112        }
1113
1114        slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1115        if (!slot_cur->func) {
1116                /* We cannot do update_slot_info here, since no memory for
1117                 * kmalloc n.e.ways, and update_slot_info allocates some */
1118                err("out of system memory\n");
1119                rc = -ENOMEM;
1120                goto error_power;
1121        }
1122        slot_cur->func->busno = slot_cur->bus;
1123        slot_cur->func->device = slot_cur->device;
1124        for (i = 0; i < 4; i++)
1125                slot_cur->func->irq[i] = slot_cur->irq[i];
1126
1127        debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1128                                        slot_cur->bus, slot_cur->device);
1129
1130        if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1131                err("configure_card was unsuccessful...\n");
1132                /* true because don't need to actually deallocate resources,
1133                 * just remove references */
1134                ibmphp_unconfigure_card(&slot_cur, 1);
1135                debug("after unconfigure_card\n");
1136                slot_cur->func = NULL;
1137                rc = -ENOMEM;
1138                goto error_power;
1139        }
1140
1141        function = 0x00;
1142        do {
1143                tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1144                                                        function++);
1145                if (tmp_func && !(tmp_func->dev))
1146                        ibm_configure_device(tmp_func);
1147        } while (tmp_func);
1148
1149        attn_off(slot_cur);
1150        if (slot_update(&slot_cur)) {
1151                rc = -EFAULT;
1152                goto exit;
1153        }
1154        ibmphp_print_test();
1155        rc = ibmphp_update_slot_info(slot_cur);
1156exit:
1157        ibmphp_unlock_operations();
1158        return rc;
1159
1160error_nopower:
1161        attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1162        attn_on(slot_cur);
1163error_cont:
1164        rcpr = slot_update(&slot_cur);
1165        if (rcpr) {
1166                rc = rcpr;
1167                goto exit;
1168        }
1169        ibmphp_update_slot_info(slot_cur);
1170        goto exit;
1171
1172error_power:
1173        attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1174        attn_on(slot_cur);
1175        rcpr = power_off(slot_cur);
1176        if (rcpr) {
1177                rc = rcpr;
1178                goto exit;
1179        }
1180        goto error_cont;
1181}
1182
1183/**************************************************************
1184* HOT REMOVING ADAPTER CARD                                   *
1185* INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1186* OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1187*               DISABLE POWER ,                               *
1188**************************************************************/
1189static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1190{
1191        struct slot *slot = hotplug_slot->private;
1192        int rc;
1193
1194        ibmphp_lock_operations();
1195        rc = ibmphp_do_disable_slot(slot);
1196        ibmphp_unlock_operations();
1197        return rc;
1198}
1199
1200int ibmphp_do_disable_slot(struct slot *slot_cur)
1201{
1202        int rc;
1203        u8 flag;
1204
1205        debug("DISABLING SLOT...\n");
1206
1207        if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1208                return -ENODEV;
1209
1210        flag = slot_cur->flag;
1211        slot_cur->flag = 1;
1212
1213        if (flag == 1) {
1214                rc = validate(slot_cur, DISABLE);
1215                        /* checking if powered off already & valid slot # */
1216                if (rc)
1217                        goto error;
1218        }
1219        attn_LED_blink(slot_cur);
1220
1221        if (slot_cur->func == NULL) {
1222                /* We need this for functions that were there on bootup */
1223                slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1224                if (!slot_cur->func) {
1225                        err("out of system memory\n");
1226                        rc = -ENOMEM;
1227                        goto error;
1228                }
1229                slot_cur->func->busno = slot_cur->bus;
1230                slot_cur->func->device = slot_cur->device;
1231        }
1232
1233        ibm_unconfigure_device(slot_cur->func);
1234
1235        /*
1236         * If we got here from latch suddenly opening on operating card or
1237         * a power fault, there's no power to the card, so cannot
1238         * read from it to determine what resources it occupied.  This operation
1239         * is forbidden anyhow.  The best we can do is remove it from kernel
1240         * lists at least */
1241
1242        if (!flag) {
1243                attn_off(slot_cur);
1244                return 0;
1245        }
1246
1247        rc = ibmphp_unconfigure_card(&slot_cur, 0);
1248        slot_cur->func = NULL;
1249        debug("in disable_slot. after unconfigure_card\n");
1250        if (rc) {
1251                err("could not unconfigure card.\n");
1252                goto error;
1253        }
1254
1255        rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1256        if (rc)
1257                goto error;
1258
1259        attn_off(slot_cur);
1260        rc = slot_update(&slot_cur);
1261        if (rc)
1262                goto exit;
1263
1264        rc = ibmphp_update_slot_info(slot_cur);
1265        ibmphp_print_test();
1266exit:
1267        return rc;
1268
1269error:
1270        /*  Need to turn off if was blinking b4 */
1271        attn_off(slot_cur);
1272        attn_on(slot_cur);
1273        if (slot_update(&slot_cur)) {
1274                rc = -EFAULT;
1275                goto exit;
1276        }
1277        if (flag)
1278                ibmphp_update_slot_info(slot_cur);
1279        goto exit;
1280}
1281
1282struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1283        .set_attention_status =         set_attention_status,
1284        .enable_slot =                  enable_slot,
1285        .disable_slot =                 ibmphp_disable_slot,
1286        .hardware_test =                NULL,
1287        .get_power_status =             get_power_status,
1288        .get_attention_status =         get_attention_status,
1289        .get_latch_status =             get_latch_status,
1290        .get_adapter_status =           get_adapter_present,
1291/*      .get_max_adapter_speed =        get_max_adapter_speed,
1292        .get_bus_name_status =          get_bus_name,
1293*/
1294};
1295
1296static void ibmphp_unload(void)
1297{
1298        free_slots();
1299        debug("after slots\n");
1300        ibmphp_free_resources();
1301        debug("after resources\n");
1302        ibmphp_free_bus_info_queue();
1303        debug("after bus info\n");
1304        ibmphp_free_ebda_hpc_queue();
1305        debug("after ebda hpc\n");
1306        ibmphp_free_ebda_pci_rsrc_queue();
1307        debug("after ebda pci rsrc\n");
1308        kfree(ibmphp_pci_bus);
1309}
1310
1311static int __init ibmphp_init(void)
1312{
1313        struct pci_bus *bus;
1314        int i = 0;
1315        int rc = 0;
1316
1317        init_flag = 1;
1318
1319        info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1320
1321        ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1322        if (!ibmphp_pci_bus) {
1323                err("out of memory\n");
1324                rc = -ENOMEM;
1325                goto exit;
1326        }
1327
1328        bus = pci_find_bus(0, 0);
1329        if (!bus) {
1330                err("Can't find the root pci bus, can not continue\n");
1331                rc = -ENODEV;
1332                goto error;
1333        }
1334        memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1335
1336        ibmphp_debug = debug;
1337
1338        ibmphp_hpc_initvars();
1339
1340        for (i = 0; i < 16; i++)
1341                irqs[i] = 0;
1342
1343        rc = ibmphp_access_ebda();
1344        if (rc)
1345                goto error;
1346        debug("after ibmphp_access_ebda()\n");
1347
1348        rc = ibmphp_rsrc_init();
1349        if (rc)
1350                goto error;
1351        debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1352
1353        max_slots = get_max_slots();
1354
1355        rc = ibmphp_register_pci();
1356        if (rc)
1357                goto error;
1358
1359        if (init_ops()) {
1360                rc = -ENODEV;
1361                goto error;
1362        }
1363
1364        ibmphp_print_test();
1365        rc = ibmphp_hpc_start_poll_thread();
1366        if (rc)
1367                goto error;
1368
1369exit:
1370        return rc;
1371
1372error:
1373        ibmphp_unload();
1374        goto exit;
1375}
1376
1377static void __exit ibmphp_exit(void)
1378{
1379        ibmphp_hpc_stop_poll_thread();
1380        debug("after polling\n");
1381        ibmphp_unload();
1382        debug("done\n");
1383}
1384
1385module_init(ibmphp_init);
1386module_exit(ibmphp_exit);
1387