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