drivers/pci/hotplug/ibmphp_core.c

   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
  50 int ibmphp_debug;
  51
  52 static bool debug;
  53 module_param(debug, bool, S_IRUGO | S_IWUSR);
  54 MODULE_PARM_DESC (debug, "Debugging mode enabled or not");
  55 MODULE_LICENSE ("GPL");
  56 MODULE_DESCRIPTION (DRIVER_DESC);
  57
  58 struct pci_bus *ibmphp_pci_bus;
  59 static int max_slots;
  60
  61 static 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
  64 static int init_flag;
  65
  66 /*
  67 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
  68
  69 static 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 */
  74 static 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
 104 static 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
 115 static 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  */
 135 int 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
 204 static 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
 222 static 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
 239 static 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
 283 static 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
 314 static 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
 341 static 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
 367 static 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
 398 static 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 /*
 436 static 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
 474 static 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  ****************************************************************************/
 503 static 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  */
 566 static 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  ****************************************************************************/
 607 int 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
 670 static 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  *************************************************************/
 696 static 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
 711 static 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  */
 741 static u8 bus_structure_fixup(u8 busno)
 742 {
 743         struct pci_bus *bus;
 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                         pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
 771                         break;
 772                 }
 773         }
 774
 775         kfree(dev);
 776         kfree(bus);
 777
 778         return 0;
 779 }
 780
 781 static int ibm_configure_device(struct pci_func *func)
 782 {
 783         struct pci_bus *child;
 784         int num;
 785         int flag = 0;   /* this is to make sure we don't double scan the bus,
 786                                         for bridged devices primarily */
 787
 788         pci_lock_rescan_remove();
 789
 790         if (!(bus_structure_fixup(func->busno)))
 791                 flag = 1;
 792         if (func->dev == NULL)
 793                 func->dev = pci_get_bus_and_slot(func->busno,
 794                                 PCI_DEVFN(func->device, func->function));
 795
 796         if (func->dev == NULL) {
 797                 struct pci_bus *bus = pci_find_bus(0, func->busno);
 798                 if (!bus)
 799                         goto out;
 800
 801                 num = pci_scan_slot(bus,
 802                                 PCI_DEVFN(func->device, func->function));
 803                 if (num)
 804                         pci_bus_add_devices(bus);
 805
 806                 func->dev = pci_get_bus_and_slot(func->busno,
 807                                 PCI_DEVFN(func->device, func->function));
 808                 if (func->dev == NULL) {
 809                         err("ERROR... : pci_dev still NULL\n");
 810                         goto out;
 811                 }
 812         }
 813         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
 814                 pci_hp_add_bridge(func->dev);
 815                 child = func->dev->subordinate;
 816                 if (child)
 817                         pci_bus_add_devices(child);
 818         }
 819
 820  out:
 821         pci_unlock_rescan_remove();
 822         return 0;
 823 }
 824
 825 /*******************************************************
 826  * Returns whether the bus is empty or not
 827  *******************************************************/
 828 static int is_bus_empty(struct slot *slot_cur)
 829 {
 830         int rc;
 831         struct slot *tmp_slot;
 832         u8 i = slot_cur->bus_on->slot_min;
 833
 834         while (i <= slot_cur->bus_on->slot_max) {
 835                 if (i == slot_cur->number) {
 836                         i++;
 837                         continue;
 838                 }
 839                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
 840                 if (!tmp_slot)
 841                         return 0;
 842                 rc = slot_update(&tmp_slot);
 843                 if (rc)
 844                         return 0;
 845                 if (SLOT_PRESENT(tmp_slot->status) &&
 846                                         SLOT_PWRGD(tmp_slot->status))
 847                         return 0;
 848                 i++;
 849         }
 850         return 1;
 851 }
 852
 853 /***********************************************************
 854  * If the HPC permits and the bus currently empty, tries to set the
 855  * bus speed and mode at the maximum card and bus capability
 856  * Parameters: slot
 857  * Returns: bus is set (0) or error code
 858  ***********************************************************/
 859 static int set_bus(struct slot *slot_cur)
 860 {
 861         int rc;
 862         u8 speed;
 863         u8 cmd = 0x0;
 864         int retval;
 865         static struct pci_device_id ciobx[] = {
 866                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
 867                 { },
 868         };
 869
 870         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
 871         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
 872                 rc = slot_update(&slot_cur);
 873                 if (rc)
 874                         return rc;
 875                 speed = SLOT_SPEED(slot_cur->ext_status);
 876                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
 877                 switch (speed) {
 878                 case HPC_SLOT_SPEED_33:
 879                         cmd = HPC_BUS_33CONVMODE;
 880                         break;
 881                 case HPC_SLOT_SPEED_66:
 882                         if (SLOT_PCIX(slot_cur->ext_status)) {
 883                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
 884                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
 885                                         cmd = HPC_BUS_66PCIXMODE;
 886                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
 887                                         /* if max slot/bus capability is 66 pci
 888                                         and there's no bus mode mismatch, then
 889                                         the adapter supports 66 pci */
 890                                         cmd = HPC_BUS_66CONVMODE;
 891                                 else
 892                                         cmd = HPC_BUS_33CONVMODE;
 893                         } else {
 894                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
 895                                         cmd = HPC_BUS_66CONVMODE;
 896                                 else
 897                                         cmd = HPC_BUS_33CONVMODE;
 898                         }
 899                         break;
 900                 case HPC_SLOT_SPEED_133:
 901                         switch (slot_cur->supported_speed) {
 902                         case BUS_SPEED_33:
 903                                 cmd = HPC_BUS_33CONVMODE;
 904                                 break;
 905                         case BUS_SPEED_66:
 906                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
 907                                         cmd = HPC_BUS_66PCIXMODE;
 908                                 else
 909                                         cmd = HPC_BUS_66CONVMODE;
 910                                 break;
 911                         case BUS_SPEED_100:
 912                                 cmd = HPC_BUS_100PCIXMODE;
 913                                 break;
 914                         case BUS_SPEED_133:
 915                                 /* This is to take care of the bug in CIOBX chip */
 916                                 if (pci_dev_present(ciobx))
 917                                         ibmphp_hpc_writeslot(slot_cur,
 918                                                         HPC_BUS_100PCIXMODE);
 919                                 cmd = HPC_BUS_133PCIXMODE;
 920                                 break;
 921                         default:
 922                                 err("Wrong bus speed\n");
 923                                 return -ENODEV;
 924                         }
 925                         break;
 926                 default:
 927                         err("wrong slot speed\n");
 928                         return -ENODEV;
 929                 }
 930                 debug("setting bus speed for slot %d, cmd %x\n",
 931                                                 slot_cur->number, cmd);
 932                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 933                 if (retval) {
 934                         err("setting bus speed failed\n");
 935                         return retval;
 936                 }
 937                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
 938                         err("command not completed successfully in set_bus\n");
 939                         return -EIO;
 940                 }
 941         }
 942         /* This is for x440, once Brandon fixes the firmware,
 943         will not need this delay */
 944         msleep(1000);
 945         debug("%s -Exit\n", __func__);
 946         return 0;
 947 }
 948
 949 /* This routine checks the bus limitations that the slot is on from the BIOS.
 950  * This is used in deciding whether or not to power up the slot.
 951  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
 952  * same bus)
 953  * Parameters: slot
 954  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
 955  */
 956 static int check_limitations(struct slot *slot_cur)
 957 {
 958         u8 i;
 959         struct slot *tmp_slot;
 960         u8 count = 0;
 961         u8 limitation = 0;
 962
 963         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
 964                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
 965                 if (!tmp_slot)
 966                         return -ENODEV;
 967                 if ((SLOT_PWRGD(tmp_slot->status)) &&
 968                                         !(SLOT_CONNECT(tmp_slot->status)))
 969                         count++;
 970         }
 971         get_cur_bus_info(&slot_cur);
 972         switch (slot_cur->bus_on->current_speed) {
 973         case BUS_SPEED_33:
 974                 limitation = slot_cur->bus_on->slots_at_33_conv;
 975                 break;
 976         case BUS_SPEED_66:
 977                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
 978                         limitation = slot_cur->bus_on->slots_at_66_pcix;
 979                 else
 980                         limitation = slot_cur->bus_on->slots_at_66_conv;
 981                 break;
 982         case BUS_SPEED_100:
 983                 limitation = slot_cur->bus_on->slots_at_100_pcix;
 984                 break;
 985         case BUS_SPEED_133:
 986                 limitation = slot_cur->bus_on->slots_at_133_pcix;
 987                 break;
 988         }
 989
 990         if ((count + 1) > limitation)
 991                 return -EINVAL;
 992         return 0;
 993 }
 994
 995 static inline void print_card_capability(struct slot *slot_cur)
 996 {
 997         info("capability of the card is ");
 998         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
 999                 info("   133 MHz PCI-X\n");
1000         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
1001                 info("    66 MHz PCI-X\n");
1002         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1003                 info("    66 MHz PCI\n");
1004         else
1005                 info("    33 MHz PCI\n");
1006
1007 }
1008
1009 /* This routine will power on the slot, configure the device(s) and find the
1010  * drivers for them.
1011  * Parameters: hotplug_slot
1012  * Returns: 0 or failure codes
1013  */
1014 static int enable_slot(struct hotplug_slot *hs)
1015 {
1016         int rc, i, rcpr;
1017         struct slot *slot_cur;
1018         u8 function;
1019         struct pci_func *tmp_func;
1020
1021         ibmphp_lock_operations();
1022
1023         debug("ENABLING SLOT........\n");
1024         slot_cur = hs->private;
1025
1026         if ((rc = validate(slot_cur, ENABLE))) {
1027                 err("validate function failed\n");
1028                 goto error_nopower;
1029         }
1030
1031         attn_LED_blink(slot_cur);
1032
1033         rc = set_bus(slot_cur);
1034         if (rc) {
1035                 err("was not able to set the bus\n");
1036                 goto error_nopower;
1037         }
1038
1039         /*-----------------debugging------------------------------*/
1040         get_cur_bus_info(&slot_cur);
1041         debug("the current bus speed right after set_bus = %x\n",
1042                                         slot_cur->bus_on->current_speed);
1043         /*----------------------------------------------------------*/
1044
1045         rc = check_limitations(slot_cur);
1046         if (rc) {
1047                 err("Adding this card exceeds the limitations of this bus.\n");
1048                 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1049                 err("Try hot-adding into another bus\n");
1050                 rc = -EINVAL;
1051                 goto error_nopower;
1052         }
1053
1054         rc = power_on(slot_cur);
1055
1056         if (rc) {
1057                 err("something wrong when powering up... please see below for details\n");
1058                 /* need to turn off before on, otherwise, blinking overwrites */
1059                 attn_off(slot_cur);
1060                 attn_on(slot_cur);
1061                 if (slot_update(&slot_cur)) {
1062                         attn_off(slot_cur);
1063                         attn_on(slot_cur);
1064                         rc = -ENODEV;
1065                         goto exit;
1066                 }
1067                 /* Check to see the error of why it failed */
1068                 if ((SLOT_POWER(slot_cur->status)) &&
1069                                         !(SLOT_PWRGD(slot_cur->status)))
1070                         err("power fault occurred trying to power up\n");
1071                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1072                         err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1073                         print_card_capability(slot_cur);
1074                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1075                         err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1076                         print_card_capability(slot_cur);
1077                 }
1078                 ibmphp_update_slot_info(slot_cur);
1079                 goto exit;
1080         }
1081         debug("after power_on\n");
1082         /*-----------------------debugging---------------------------*/
1083         get_cur_bus_info(&slot_cur);
1084         debug("the current bus speed right after power_on = %x\n",
1085                                         slot_cur->bus_on->current_speed);
1086         /*----------------------------------------------------------*/
1087
1088         rc = slot_update(&slot_cur);
1089         if (rc)
1090                 goto error_power;
1091
1092         rc = -EINVAL;
1093         if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1094                 err("power fault occurred trying to power up...\n");
1095                 goto error_power;
1096         }
1097         if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1098                 err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1099                 print_card_capability(slot_cur);
1100                 goto error_power;
1101         }
1102         /* Don't think this case will happen after above checks...
1103          * but just in case, for paranoia sake */
1104         if (!(SLOT_POWER(slot_cur->status))) {
1105                 err("power on failed...\n");
1106                 goto error_power;
1107         }
1108
1109         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1110         if (!slot_cur->func) {
1111                 /* We cannot do update_slot_info here, since no memory for
1112                  * kmalloc n.e.ways, and update_slot_info allocates some */
1113                 err("out of system memory\n");
1114                 rc = -ENOMEM;
1115                 goto error_power;
1116         }
1117         slot_cur->func->busno = slot_cur->bus;
1118         slot_cur->func->device = slot_cur->device;
1119         for (i = 0; i < 4; i++)
1120                 slot_cur->func->irq[i] = slot_cur->irq[i];
1121
1122         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1123                                         slot_cur->bus, slot_cur->device);
1124
1125         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1126                 err("configure_card was unsuccessful...\n");
1127                 /* true because don't need to actually deallocate resources,
1128                  * just remove references */
1129                 ibmphp_unconfigure_card(&slot_cur, 1);
1130                 debug("after unconfigure_card\n");
1131                 slot_cur->func = NULL;
1132                 rc = -ENOMEM;
1133                 goto error_power;
1134         }
1135
1136         function = 0x00;
1137         do {
1138                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1139                                                         function++);
1140                 if (tmp_func && !(tmp_func->dev))
1141                         ibm_configure_device(tmp_func);
1142         } while (tmp_func);
1143
1144         attn_off(slot_cur);
1145         if (slot_update(&slot_cur)) {
1146                 rc = -EFAULT;
1147                 goto exit;
1148         }
1149         ibmphp_print_test();
1150         rc = ibmphp_update_slot_info(slot_cur);
1151 exit:
1152         ibmphp_unlock_operations();
1153         return rc;
1154
1155 error_nopower:
1156         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1157         attn_on(slot_cur);
1158 error_cont:
1159         rcpr = slot_update(&slot_cur);
1160         if (rcpr) {
1161                 rc = rcpr;
1162                 goto exit;
1163         }
1164         ibmphp_update_slot_info(slot_cur);
1165         goto exit;
1166
1167 error_power:
1168         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1169         attn_on(slot_cur);
1170         rcpr = power_off(slot_cur);
1171         if (rcpr) {
1172                 rc = rcpr;
1173                 goto exit;
1174         }
1175         goto error_cont;
1176 }
1177
1178 /**************************************************************
1179 * HOT REMOVING ADAPTER CARD                                   *
1180 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1181 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1182           DISABLE POWER ,                                    *
1183 **************************************************************/
1184 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1185 {
1186         struct slot *slot = hotplug_slot->private;
1187         int rc;
1188
1189         ibmphp_lock_operations();
1190         rc = ibmphp_do_disable_slot(slot);
1191         ibmphp_unlock_operations();
1192         return rc;
1193 }
1194
1195 int ibmphp_do_disable_slot(struct slot *slot_cur)
1196 {
1197         int rc;
1198         u8 flag;
1199
1200         debug("DISABLING SLOT...\n");
1201
1202         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) {
1203                 return -ENODEV;
1204         }
1205
1206         flag = slot_cur->flag;
1207         slot_cur->flag = 1;
1208
1209         if (flag == 1) {
1210                 rc = validate(slot_cur, DISABLE);
1211                         /* checking if powered off already & valid slot # */
1212                 if (rc)
1213                         goto error;
1214         }
1215         attn_LED_blink(slot_cur);
1216
1217         if (slot_cur->func == NULL) {
1218                 /* We need this for functions that were there on bootup */
1219                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1220                 if (!slot_cur->func) {
1221                         err("out of system memory\n");
1222                         rc = -ENOMEM;
1223                         goto error;
1224                 }
1225                 slot_cur->func->busno = slot_cur->bus;
1226                 slot_cur->func->device = slot_cur->device;
1227         }
1228
1229         ibm_unconfigure_device(slot_cur->func);
1230
1231         /*
1232          * If we got here from latch suddenly opening on operating card or
1233          * a power fault, there's no power to the card, so cannot
1234          * read from it to determine what resources it occupied.  This operation
1235          * is forbidden anyhow.  The best we can do is remove it from kernel
1236          * lists at least */
1237
1238         if (!flag) {
1239                 attn_off(slot_cur);
1240                 return 0;
1241         }
1242
1243         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1244         slot_cur->func = NULL;
1245         debug("in disable_slot. after unconfigure_card\n");
1246         if (rc) {
1247                 err("could not unconfigure card.\n");
1248                 goto error;
1249         }
1250
1251         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1252         if (rc)
1253                 goto error;
1254
1255         attn_off(slot_cur);
1256         rc = slot_update(&slot_cur);
1257         if (rc)
1258                 goto exit;
1259
1260         rc = ibmphp_update_slot_info(slot_cur);
1261         ibmphp_print_test();
1262 exit:
1263         return rc;
1264
1265 error:
1266         /*  Need to turn off if was blinking b4 */
1267         attn_off(slot_cur);
1268         attn_on(slot_cur);
1269         if (slot_update(&slot_cur)) {
1270                 rc = -EFAULT;
1271                 goto exit;
1272         }
1273         if (flag)
1274                 ibmphp_update_slot_info(slot_cur);
1275         goto exit;
1276 }
1277
1278 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1279         .set_attention_status =         set_attention_status,
1280         .enable_slot =                  enable_slot,
1281         .disable_slot =                 ibmphp_disable_slot,
1282         .hardware_test =                NULL,
1283         .get_power_status =             get_power_status,
1284         .get_attention_status =         get_attention_status,
1285         .get_latch_status =             get_latch_status,
1286         .get_adapter_status =           get_adapter_present,
1287 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1288         .get_bus_name_status =          get_bus_name,
1289 */
1290 };
1291
1292 static void ibmphp_unload(void)
1293 {
1294         free_slots();
1295         debug("after slots\n");
1296         ibmphp_free_resources();
1297         debug("after resources\n");
1298         ibmphp_free_bus_info_queue();
1299         debug("after bus info\n");
1300         ibmphp_free_ebda_hpc_queue();
1301         debug("after ebda hpc\n");
1302         ibmphp_free_ebda_pci_rsrc_queue();
1303         debug("after ebda pci rsrc\n");
1304         kfree(ibmphp_pci_bus);
1305 }
1306
1307 static int __init ibmphp_init(void)
1308 {
1309         struct pci_bus *bus;
1310         int i = 0;
1311         int rc = 0;
1312
1313         init_flag = 1;
1314
1315         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1316
1317         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1318         if (!ibmphp_pci_bus) {
1319                 err("out of memory\n");
1320                 rc = -ENOMEM;
1321                 goto exit;
1322         }
1323
1324         bus = pci_find_bus(0, 0);
1325         if (!bus) {
1326                 err("Can't find the root pci bus, can not continue\n");
1327                 rc = -ENODEV;
1328                 goto error;
1329         }
1330         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1331
1332         ibmphp_debug = debug;
1333
1334         ibmphp_hpc_initvars();
1335
1336         for (i = 0; i < 16; i++)
1337                 irqs[i] = 0;
1338
1339         if ((rc = ibmphp_access_ebda()))
1340                 goto error;
1341         debug("after ibmphp_access_ebda()\n");
1342
1343         if ((rc = ibmphp_rsrc_init()))
1344                 goto error;
1345         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1346
1347         max_slots = get_max_slots();
1348
1349         if ((rc = ibmphp_register_pci()))
1350                 goto error;
1351
1352         if (init_ops()) {
1353                 rc = -ENODEV;
1354                 goto error;
1355         }
1356
1357         ibmphp_print_test();
1358         if ((rc = ibmphp_hpc_start_poll_thread())) {
1359                 goto error;
1360         }
1361
1362 exit:
1363         return rc;
1364
1365 error:
1366         ibmphp_unload();
1367         goto exit;
1368 }
1369
1370 static void __exit ibmphp_exit(void)
1371 {
1372         ibmphp_hpc_stop_poll_thread();
1373         debug("after polling\n");
1374         ibmphp_unload();
1375         debug("done\n");
1376 }
1377
1378 module_init(ibmphp_init);
1379 module_exit(ibmphp_exit);