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