drivers/pci/hotplug/ibmphp

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This source file includes following definitions.
get_cur_bus_info
slot_update
get_max_slots
ibmphp_init_devno
power_on
power_off
set_attention_status
get_attention_status
get_latch_status
get_power_status
get_adapter_present
get_max_bus_speed
init_ops
validate
ibmphp_update_slot_info
ibm_slot_find
free_slots
ibm_unconfigure_device
bus_structure_fixup
ibm_configure_device
is_bus_empty
set_bus
check_limitations
print_card_capability
enable_slot
ibmphp_disable_slot
ibmphp_do_disable_slot
ibmphp_unload
ibmphp_init
ibmphp_exit
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * IBM Hot Plug Controller Driver
   4  *
   5  * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
   6  *
   7  * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
   8  * Copyright (C) 2001-2003 IBM Corp.
   9  *
  10  * All rights reserved.
  11  *
  12  * Send feedback to <gregkh@us.ibm.com>
  13  *
  14  */
  15 
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/pci.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/delay.h>
  22 #include <linux/wait.h>
  23 #include "../pci.h"
  24 #include <asm/pci_x86.h>                /* for struct irq_routing_table */
  25 #include <asm/io_apic.h>
  26 #include "ibmphp.h"
  27 
  28 #define attn_on(sl)  ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
  29 #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
  30 #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
  31 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
  32 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
  33 
  34 #define DRIVER_VERSION  "0.6"
  35 #define DRIVER_DESC     "IBM Hot Plug PCI Controller Driver"
  36 
  37 int ibmphp_debug;
  38 
  39 static bool debug;
  40 module_param(debug, bool, S_IRUGO | S_IWUSR);
  41 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  42 MODULE_LICENSE("GPL");
  43 MODULE_DESCRIPTION(DRIVER_DESC);
  44 
  45 struct pci_bus *ibmphp_pci_bus;
  46 static int max_slots;
  47 
  48 static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
  49                          * tables don't provide default info for empty slots */
  50 
  51 static int init_flag;
  52 
  53 /*
  54 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
  55 
  56 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
  57 {
  58         return get_max_adapter_speed_1 (hs, value, 1);
  59 }
  60 */
  61 static inline int get_cur_bus_info(struct slot **sl)
  62 {
  63         int rc = 1;
  64         struct slot *slot_cur = *sl;
  65 
  66         debug("options = %x\n", slot_cur->ctrl->options);
  67         debug("revision = %x\n", slot_cur->ctrl->revision);
  68 
  69         if (READ_BUS_STATUS(slot_cur->ctrl))
  70                 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
  71 
  72         if (rc)
  73                 return rc;
  74 
  75         slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
  76         if (READ_BUS_MODE(slot_cur->ctrl))
  77                 slot_cur->bus_on->current_bus_mode =
  78                                 CURRENT_BUS_MODE(slot_cur->busstatus);
  79         else
  80                 slot_cur->bus_on->current_bus_mode = 0xFF;
  81 
  82         debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
  83                         slot_cur->busstatus,
  84                         slot_cur->bus_on->current_speed,
  85                         slot_cur->bus_on->current_bus_mode);
  86 
  87         *sl = slot_cur;
  88         return 0;
  89 }
  90 
  91 static inline int slot_update(struct slot **sl)
  92 {
  93         int rc;
  94         rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
  95         if (rc)
  96                 return rc;
  97         if (!init_flag)
  98                 rc = get_cur_bus_info(sl);
  99         return rc;
 100 }
 101 
 102 static int __init get_max_slots(void)
 103 {
 104         struct slot *slot_cur;
 105         u8 slot_count = 0;
 106 
 107         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 108                 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
 109                 slot_count = max(slot_count, slot_cur->number);
 110         }
 111         return slot_count;
 112 }
 113 
 114 /* This routine will put the correct slot->device information per slot.  It's
 115  * called from initialization of the slot structures. It will also assign
 116  * interrupt numbers per each slot.
 117  * Parameters: struct slot
 118  * Returns 0 or errors
 119  */
 120 int ibmphp_init_devno(struct slot **cur_slot)
 121 {
 122         struct irq_routing_table *rtable;
 123         int len;
 124         int loop;
 125         int i;
 126 
 127         rtable = pcibios_get_irq_routing_table();
 128         if (!rtable) {
 129                 err("no BIOS routing table...\n");
 130                 return -ENOMEM;
 131         }
 132 
 133         len = (rtable->size - sizeof(struct irq_routing_table)) /
 134                         sizeof(struct irq_info);
 135 
 136         if (!len) {
 137                 kfree(rtable);
 138                 return -1;
 139         }
 140         for (loop = 0; loop < len; loop++) {
 141                 if ((*cur_slot)->number == rtable->slots[loop].slot &&
 142                     (*cur_slot)->bus == rtable->slots[loop].bus) {
 143                         (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
 144                         for (i = 0; i < 4; i++)
 145                                 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
 146                                                 (int) (*cur_slot)->device, i);
 147 
 148                         debug("(*cur_slot)->irq[0] = %x\n",
 149                                         (*cur_slot)->irq[0]);
 150                         debug("(*cur_slot)->irq[1] = %x\n",
 151                                         (*cur_slot)->irq[1]);
 152                         debug("(*cur_slot)->irq[2] = %x\n",
 153                                         (*cur_slot)->irq[2]);
 154                         debug("(*cur_slot)->irq[3] = %x\n",
 155                                         (*cur_slot)->irq[3]);
 156 
 157                         debug("rtable->exclusive_irqs = %x\n",
 158                                         rtable->exclusive_irqs);
 159                         debug("rtable->slots[loop].irq[0].bitmap = %x\n",
 160                                         rtable->slots[loop].irq[0].bitmap);
 161                         debug("rtable->slots[loop].irq[1].bitmap = %x\n",
 162                                         rtable->slots[loop].irq[1].bitmap);
 163                         debug("rtable->slots[loop].irq[2].bitmap = %x\n",
 164                                         rtable->slots[loop].irq[2].bitmap);
 165                         debug("rtable->slots[loop].irq[3].bitmap = %x\n",
 166                                         rtable->slots[loop].irq[3].bitmap);
 167 
 168                         debug("rtable->slots[loop].irq[0].link = %x\n",
 169                                         rtable->slots[loop].irq[0].link);
 170                         debug("rtable->slots[loop].irq[1].link = %x\n",
 171                                         rtable->slots[loop].irq[1].link);
 172                         debug("rtable->slots[loop].irq[2].link = %x\n",
 173                                         rtable->slots[loop].irq[2].link);
 174                         debug("rtable->slots[loop].irq[3].link = %x\n",
 175                                         rtable->slots[loop].irq[3].link);
 176                         debug("end of init_devno\n");
 177                         kfree(rtable);
 178                         return 0;
 179                 }
 180         }
 181 
 182         kfree(rtable);
 183         return -1;
 184 }
 185 
 186 static inline int power_on(struct slot *slot_cur)
 187 {
 188         u8 cmd = HPC_SLOT_ON;
 189         int retval;
 190 
 191         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 192         if (retval) {
 193                 err("power on failed\n");
 194                 return retval;
 195         }
 196         if (CTLR_RESULT(slot_cur->ctrl->status)) {
 197                 err("command not completed successfully in power_on\n");
 198                 return -EIO;
 199         }
 200         msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
 201         return 0;
 202 }
 203 
 204 static inline int power_off(struct slot *slot_cur)
 205 {
 206         u8 cmd = HPC_SLOT_OFF;
 207         int retval;
 208 
 209         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 210         if (retval) {
 211                 err("power off failed\n");
 212                 return retval;
 213         }
 214         if (CTLR_RESULT(slot_cur->ctrl->status)) {
 215                 err("command not completed successfully in power_off\n");
 216                 retval = -EIO;
 217         }
 218         return retval;
 219 }
 220 
 221 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
 222 {
 223         int rc = 0;
 224         struct slot *pslot;
 225         u8 cmd = 0x00;     /* avoid compiler warning */
 226 
 227         debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
 228                         (ulong) hotplug_slot, value);
 229         ibmphp_lock_operations();
 230 
 231 
 232         if (hotplug_slot) {
 233                 switch (value) {
 234                 case HPC_SLOT_ATTN_OFF:
 235                         cmd = HPC_SLOT_ATTNOFF;
 236                         break;
 237                 case HPC_SLOT_ATTN_ON:
 238                         cmd = HPC_SLOT_ATTNON;
 239                         break;
 240                 case HPC_SLOT_ATTN_BLINK:
 241                         cmd = HPC_SLOT_BLINKLED;
 242                         break;
 243                 default:
 244                         rc = -ENODEV;
 245                         err("set_attention_status - Error : invalid input [%x]\n",
 246                                         value);
 247                         break;
 248                 }
 249                 if (rc == 0) {
 250                         pslot = to_slot(hotplug_slot);
 251                         rc = ibmphp_hpc_writeslot(pslot, cmd);
 252                 }
 253         } else
 254                 rc = -ENODEV;
 255 
 256         ibmphp_unlock_operations();
 257 
 258         debug("set_attention_status - Exit rc[%d]\n", rc);
 259         return rc;
 260 }
 261 
 262 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 263 {
 264         int rc = -ENODEV;
 265         struct slot *pslot;
 266         struct slot myslot;
 267 
 268         debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 269                                         (ulong) hotplug_slot, (ulong) value);
 270 
 271         ibmphp_lock_operations();
 272         if (hotplug_slot) {
 273                 pslot = to_slot(hotplug_slot);
 274                 memcpy(&myslot, pslot, sizeof(struct slot));
 275                 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 276                                          &myslot.status);
 277                 if (!rc)
 278                         rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS,
 279                                                  &myslot.ext_status);
 280                 if (!rc)
 281                         *value = SLOT_ATTN(myslot.status, myslot.ext_status);
 282         }
 283 
 284         ibmphp_unlock_operations();
 285         debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
 286         return rc;
 287 }
 288 
 289 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 290 {
 291         int rc = -ENODEV;
 292         struct slot *pslot;
 293         struct slot myslot;
 294 
 295         debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 296                                         (ulong) hotplug_slot, (ulong) value);
 297         ibmphp_lock_operations();
 298         if (hotplug_slot) {
 299                 pslot = to_slot(hotplug_slot);
 300                 memcpy(&myslot, pslot, sizeof(struct slot));
 301                 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 302                                          &myslot.status);
 303                 if (!rc)
 304                         *value = SLOT_LATCH(myslot.status);
 305         }
 306 
 307         ibmphp_unlock_operations();
 308         debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
 309                         rc, rc, *value);
 310         return rc;
 311 }
 312 
 313 
 314 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 315 {
 316         int rc = -ENODEV;
 317         struct slot *pslot;
 318         struct slot myslot;
 319 
 320         debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 321                                         (ulong) hotplug_slot, (ulong) value);
 322         ibmphp_lock_operations();
 323         if (hotplug_slot) {
 324                 pslot = to_slot(hotplug_slot);
 325                 memcpy(&myslot, pslot, sizeof(struct slot));
 326                 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 327                                          &myslot.status);
 328                 if (!rc)
 329                         *value = SLOT_PWRGD(myslot.status);
 330         }
 331 
 332         ibmphp_unlock_operations();
 333         debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
 334                         rc, rc, *value);
 335         return rc;
 336 }
 337 
 338 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
 339 {
 340         int rc = -ENODEV;
 341         struct slot *pslot;
 342         u8 present;
 343         struct slot myslot;
 344 
 345         debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 346                                         (ulong) hotplug_slot, (ulong) value);
 347         ibmphp_lock_operations();
 348         if (hotplug_slot) {
 349                 pslot = to_slot(hotplug_slot);
 350                 memcpy(&myslot, pslot, sizeof(struct slot));
 351                 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 352                                          &myslot.status);
 353                 if (!rc) {
 354                         present = SLOT_PRESENT(myslot.status);
 355                         if (present == HPC_SLOT_EMPTY)
 356                                 *value = 0;
 357                         else
 358                                 *value = 1;
 359                 }
 360         }
 361 
 362         ibmphp_unlock_operations();
 363         debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
 364         return rc;
 365 }
 366 
 367 static int get_max_bus_speed(struct slot *slot)
 368 {
 369         int rc = 0;
 370         u8 mode = 0;
 371         enum pci_bus_speed speed;
 372         struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus;
 373 
 374         debug("%s - Entry slot[%p]\n", __func__, slot);
 375 
 376         ibmphp_lock_operations();
 377         mode = slot->supported_bus_mode;
 378         speed = slot->supported_speed;
 379         ibmphp_unlock_operations();
 380 
 381         switch (speed) {
 382         case BUS_SPEED_33:
 383                 break;
 384         case BUS_SPEED_66:
 385                 if (mode == BUS_MODE_PCIX)
 386                         speed += 0x01;
 387                 break;
 388         case BUS_SPEED_100:
 389         case BUS_SPEED_133:
 390                 speed += 0x01;
 391                 break;
 392         default:
 393                 /* Note (will need to change): there would be soon 256, 512 also */
 394                 rc = -ENODEV;
 395         }
 396 
 397         if (!rc)
 398                 bus->max_bus_speed = speed;
 399 
 400         debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
 401         return rc;
 402 }
 403 
 404 /*
 405 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
 406 {
 407         int rc = -ENODEV;
 408         struct slot *pslot;
 409         struct slot myslot;
 410 
 411         debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
 412                                                 (ulong)hotplug_slot, (ulong) value);
 413 
 414         if (flag)
 415                 ibmphp_lock_operations();
 416 
 417         if (hotplug_slot && value) {
 418                 pslot = hotplug_slot->private;
 419                 if (pslot) {
 420                         memcpy(&myslot, pslot, sizeof(struct slot));
 421                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
 422                                                 &(myslot.status));
 423 
 424                         if (!(SLOT_LATCH (myslot.status)) &&
 425                                         (SLOT_PRESENT (myslot.status))) {
 426                                 rc = ibmphp_hpc_readslot(pslot,
 427                                                 READ_EXTSLOTSTATUS,
 428                                                 &(myslot.ext_status));
 429                                 if (!rc)
 430                                         *value = SLOT_SPEED(myslot.ext_status);
 431                         } else
 432                                 *value = MAX_ADAPTER_NONE;
 433                 }
 434         }
 435 
 436         if (flag)
 437                 ibmphp_unlock_operations();
 438 
 439         debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
 440         return rc;
 441 }
 442 
 443 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
 444 {
 445         int rc = -ENODEV;
 446         struct slot *pslot = NULL;
 447 
 448         debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
 449 
 450         ibmphp_lock_operations();
 451 
 452         if (hotplug_slot) {
 453                 pslot = hotplug_slot->private;
 454                 if (pslot) {
 455                         rc = 0;
 456                         snprintf(value, 100, "Bus %x", pslot->bus);
 457                 }
 458         } else
 459                 rc = -ENODEV;
 460 
 461         ibmphp_unlock_operations();
 462         debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
 463         return rc;
 464 }
 465 */
 466 
 467 /****************************************************************************
 468  * This routine will initialize the ops data structure used in the validate
 469  * function. It will also power off empty slots that are powered on since BIOS
 470  * leaves those on, albeit disconnected
 471  ****************************************************************************/
 472 static int __init init_ops(void)
 473 {
 474         struct slot *slot_cur;
 475         int retval;
 476         int rc;
 477 
 478         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 479                 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
 480                                                         slot_cur->number);
 481                 if (slot_cur->ctrl->revision == 0xFF)
 482                         if (get_ctrl_revision(slot_cur,
 483                                                 &slot_cur->ctrl->revision))
 484                                 return -1;
 485 
 486                 if (slot_cur->bus_on->current_speed == 0xFF)
 487                         if (get_cur_bus_info(&slot_cur))
 488                                 return -1;
 489                 get_max_bus_speed(slot_cur);
 490 
 491                 if (slot_cur->ctrl->options == 0xFF)
 492                         if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
 493                                 return -1;
 494 
 495                 retval = slot_update(&slot_cur);
 496                 if (retval)
 497                         return retval;
 498 
 499                 debug("status = %x\n", slot_cur->status);
 500                 debug("ext_status = %x\n", slot_cur->ext_status);
 501                 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
 502                 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
 503                 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
 504 
 505                 if ((SLOT_PWRGD(slot_cur->status)) &&
 506                     !(SLOT_PRESENT(slot_cur->status)) &&
 507                     !(SLOT_LATCH(slot_cur->status))) {
 508                         debug("BEFORE POWER OFF COMMAND\n");
 509                                 rc = power_off(slot_cur);
 510                                 if (rc)
 511                                         return rc;
 512 
 513         /*              retval = slot_update(&slot_cur);
 514          *              if (retval)
 515          *                      return retval;
 516          *              ibmphp_update_slot_info(slot_cur);
 517          */
 518                 }
 519         }
 520         init_flag = 0;
 521         return 0;
 522 }
 523 
 524 /* This operation will check whether the slot is within the bounds and
 525  * the operation is valid to perform on that slot
 526  * Parameters: slot, operation
 527  * Returns: 0 or error codes
 528  */
 529 static int validate(struct slot *slot_cur, int opn)
 530 {
 531         int number;
 532         int retval;
 533 
 534         if (!slot_cur)
 535                 return -ENODEV;
 536         number = slot_cur->number;
 537         if ((number > max_slots) || (number < 0))
 538                 return -EBADSLT;
 539         debug("slot_number in validate is %d\n", slot_cur->number);
 540 
 541         retval = slot_update(&slot_cur);
 542         if (retval)
 543                 return retval;
 544 
 545         switch (opn) {
 546                 case ENABLE:
 547                         if (!(SLOT_PWRGD(slot_cur->status)) &&
 548                              (SLOT_PRESENT(slot_cur->status)) &&
 549                              !(SLOT_LATCH(slot_cur->status)))
 550                                 return 0;
 551                         break;
 552                 case DISABLE:
 553                         if ((SLOT_PWRGD(slot_cur->status)) &&
 554                             (SLOT_PRESENT(slot_cur->status)) &&
 555                             !(SLOT_LATCH(slot_cur->status)))
 556                                 return 0;
 557                         break;
 558                 default:
 559                         break;
 560         }
 561         err("validate failed....\n");
 562         return -EINVAL;
 563 }
 564 
 565 /****************************************************************************
 566  * This routine is for updating the data structures in the hotplug core
 567  * Parameters: struct slot
 568  * Returns: 0 or error
 569  ****************************************************************************/
 570 int ibmphp_update_slot_info(struct slot *slot_cur)
 571 {
 572         struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus;
 573         u8 bus_speed;
 574         u8 mode;
 575 
 576         bus_speed = slot_cur->bus_on->current_speed;
 577         mode = slot_cur->bus_on->current_bus_mode;
 578 
 579         switch (bus_speed) {
 580                 case BUS_SPEED_33:
 581                         break;
 582                 case BUS_SPEED_66:
 583                         if (mode == BUS_MODE_PCIX)
 584                                 bus_speed += 0x01;
 585                         else if (mode == BUS_MODE_PCI)
 586                                 ;
 587                         else
 588                                 bus_speed = PCI_SPEED_UNKNOWN;
 589                         break;
 590                 case BUS_SPEED_100:
 591                 case BUS_SPEED_133:
 592                         bus_speed += 0x01;
 593                         break;
 594                 default:
 595                         bus_speed = PCI_SPEED_UNKNOWN;
 596         }
 597 
 598         bus->cur_bus_speed = bus_speed;
 599         // To do: bus_names
 600 
 601         return 0;
 602 }
 603 
 604 
 605 /******************************************************************************
 606  * This function will return the pci_func, given bus and devfunc, or NULL.  It
 607  * is called from visit routines
 608  ******************************************************************************/
 609 
 610 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
 611 {
 612         struct pci_func *func_cur;
 613         struct slot *slot_cur;
 614         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 615                 if (slot_cur->func) {
 616                         func_cur = slot_cur->func;
 617                         while (func_cur) {
 618                                 if ((func_cur->busno == busno) &&
 619                                                 (func_cur->device == device) &&
 620                                                 (func_cur->function == function))
 621                                         return func_cur;
 622                                 func_cur = func_cur->next;
 623                         }
 624                 }
 625         }
 626         return NULL;
 627 }
 628 
 629 /*************************************************************
 630  * This routine frees up memory used by struct slot, including
 631  * the pointers to pci_func, bus, hotplug_slot, controller,
 632  * and deregistering from the hotplug core
 633  *************************************************************/
 634 static void free_slots(void)
 635 {
 636         struct slot *slot_cur, *next;
 637 
 638         debug("%s -- enter\n", __func__);
 639 
 640         list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
 641                                  ibm_slot_list) {
 642                 pci_hp_del(&slot_cur->hotplug_slot);
 643                 slot_cur->ctrl = NULL;
 644                 slot_cur->bus_on = NULL;
 645 
 646                 /*
 647                  * We don't want to actually remove the resources,
 648                  * since ibmphp_free_resources() will do just that.
 649                  */
 650                 ibmphp_unconfigure_card(&slot_cur, -1);
 651 
 652                 pci_hp_destroy(&slot_cur->hotplug_slot);
 653                 kfree(slot_cur);
 654         }
 655         debug("%s -- exit\n", __func__);
 656 }
 657 
 658 static void ibm_unconfigure_device(struct pci_func *func)
 659 {
 660         struct pci_dev *temp;
 661         u8 j;
 662 
 663         debug("inside %s\n", __func__);
 664         debug("func->device = %x, func->function = %x\n",
 665                                         func->device, func->function);
 666         debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
 667 
 668         pci_lock_rescan_remove();
 669 
 670         for (j = 0; j < 0x08; j++) {
 671                 temp = pci_get_domain_bus_and_slot(0, func->busno,
 672                                                    (func->device << 3) | j);
 673                 if (temp) {
 674                         pci_stop_and_remove_bus_device(temp);
 675                         pci_dev_put(temp);
 676                 }
 677         }
 678 
 679         pci_dev_put(func->dev);
 680 
 681         pci_unlock_rescan_remove();
 682 }
 683 
 684 /*
 685  * The following function is to fix kernel bug regarding
 686  * getting bus entries, here we manually add those primary
 687  * bus entries to kernel bus structure whenever apply
 688  */
 689 static u8 bus_structure_fixup(u8 busno)
 690 {
 691         struct pci_bus *bus, *b;
 692         struct pci_dev *dev;
 693         u16 l;
 694 
 695         if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
 696                 return 1;
 697 
 698         bus = kmalloc(sizeof(*bus), GFP_KERNEL);
 699         if (!bus)
 700                 return 1;
 701 
 702         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
 703         if (!dev) {
 704                 kfree(bus);
 705                 return 1;
 706         }
 707 
 708         bus->number = busno;
 709         bus->ops = ibmphp_pci_bus->ops;
 710         dev->bus = bus;
 711         for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
 712                 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
 713                                         (l != 0x0000) && (l != 0xffff)) {
 714                         debug("%s - Inside bus_structure_fixup()\n",
 715                                                         __func__);
 716                         b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
 717                         if (!b)
 718                                 continue;
 719 
 720                         pci_bus_add_devices(b);
 721                         break;
 722                 }
 723         }
 724 
 725         kfree(dev);
 726         kfree(bus);
 727 
 728         return 0;
 729 }
 730 
 731 static int ibm_configure_device(struct pci_func *func)
 732 {
 733         struct pci_bus *child;
 734         int num;
 735         int flag = 0;   /* this is to make sure we don't double scan the bus,
 736                                         for bridged devices primarily */
 737 
 738         pci_lock_rescan_remove();
 739 
 740         if (!(bus_structure_fixup(func->busno)))
 741                 flag = 1;
 742         if (func->dev == NULL)
 743                 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
 744                                 PCI_DEVFN(func->device, func->function));
 745 
 746         if (func->dev == NULL) {
 747                 struct pci_bus *bus = pci_find_bus(0, func->busno);
 748                 if (!bus)
 749                         goto out;
 750 
 751                 num = pci_scan_slot(bus,
 752                                 PCI_DEVFN(func->device, func->function));
 753                 if (num)
 754                         pci_bus_add_devices(bus);
 755 
 756                 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
 757                                 PCI_DEVFN(func->device, func->function));
 758                 if (func->dev == NULL) {
 759                         err("ERROR... : pci_dev still NULL\n");
 760                         goto out;
 761                 }
 762         }
 763         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
 764                 pci_hp_add_bridge(func->dev);
 765                 child = func->dev->subordinate;
 766                 if (child)
 767                         pci_bus_add_devices(child);
 768         }
 769 
 770  out:
 771         pci_unlock_rescan_remove();
 772         return 0;
 773 }
 774 
 775 /*******************************************************
 776  * Returns whether the bus is empty or not
 777  *******************************************************/
 778 static int is_bus_empty(struct slot *slot_cur)
 779 {
 780         int rc;
 781         struct slot *tmp_slot;
 782         u8 i = slot_cur->bus_on->slot_min;
 783 
 784         while (i <= slot_cur->bus_on->slot_max) {
 785                 if (i == slot_cur->number) {
 786                         i++;
 787                         continue;
 788                 }
 789                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
 790                 if (!tmp_slot)
 791                         return 0;
 792                 rc = slot_update(&tmp_slot);
 793                 if (rc)
 794                         return 0;
 795                 if (SLOT_PRESENT(tmp_slot->status) &&
 796                                         SLOT_PWRGD(tmp_slot->status))
 797                         return 0;
 798                 i++;
 799         }
 800         return 1;
 801 }
 802 
 803 /***********************************************************
 804  * If the HPC permits and the bus currently empty, tries to set the
 805  * bus speed and mode at the maximum card and bus capability
 806  * Parameters: slot
 807  * Returns: bus is set (0) or error code
 808  ***********************************************************/
 809 static int set_bus(struct slot *slot_cur)
 810 {
 811         int rc;
 812         u8 speed;
 813         u8 cmd = 0x0;
 814         int retval;
 815         static const struct pci_device_id ciobx[] = {
 816                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
 817                 { },
 818         };
 819 
 820         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
 821         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
 822                 rc = slot_update(&slot_cur);
 823                 if (rc)
 824                         return rc;
 825                 speed = SLOT_SPEED(slot_cur->ext_status);
 826                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
 827                 switch (speed) {
 828                 case HPC_SLOT_SPEED_33:
 829                         cmd = HPC_BUS_33CONVMODE;
 830                         break;
 831                 case HPC_SLOT_SPEED_66:
 832                         if (SLOT_PCIX(slot_cur->ext_status)) {
 833                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
 834                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
 835                                         cmd = HPC_BUS_66PCIXMODE;
 836                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
 837                                         /* if max slot/bus capability is 66 pci
 838                                         and there's no bus mode mismatch, then
 839                                         the adapter supports 66 pci */
 840                                         cmd = HPC_BUS_66CONVMODE;
 841                                 else
 842                                         cmd = HPC_BUS_33CONVMODE;
 843                         } else {
 844                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
 845                                         cmd = HPC_BUS_66CONVMODE;
 846                                 else
 847                                         cmd = HPC_BUS_33CONVMODE;
 848                         }
 849                         break;
 850                 case HPC_SLOT_SPEED_133:
 851                         switch (slot_cur->supported_speed) {
 852                         case BUS_SPEED_33:
 853                                 cmd = HPC_BUS_33CONVMODE;
 854                                 break;
 855                         case BUS_SPEED_66:
 856                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
 857                                         cmd = HPC_BUS_66PCIXMODE;
 858                                 else
 859                                         cmd = HPC_BUS_66CONVMODE;
 860                                 break;
 861                         case BUS_SPEED_100:
 862                                 cmd = HPC_BUS_100PCIXMODE;
 863                                 break;
 864                         case BUS_SPEED_133:
 865                                 /* This is to take care of the bug in CIOBX chip */
 866                                 if (pci_dev_present(ciobx))
 867                                         ibmphp_hpc_writeslot(slot_cur,
 868                                                         HPC_BUS_100PCIXMODE);
 869                                 cmd = HPC_BUS_133PCIXMODE;
 870                                 break;
 871                         default:
 872                                 err("Wrong bus speed\n");
 873                                 return -ENODEV;
 874                         }
 875                         break;
 876                 default:
 877                         err("wrong slot speed\n");
 878                         return -ENODEV;
 879                 }
 880                 debug("setting bus speed for slot %d, cmd %x\n",
 881                                                 slot_cur->number, cmd);
 882                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
 883                 if (retval) {
 884                         err("setting bus speed failed\n");
 885                         return retval;
 886                 }
 887                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
 888                         err("command not completed successfully in set_bus\n");
 889                         return -EIO;
 890                 }
 891         }
 892         /* This is for x440, once Brandon fixes the firmware,
 893         will not need this delay */
 894         msleep(1000);
 895         debug("%s -Exit\n", __func__);
 896         return 0;
 897 }
 898 
 899 /* This routine checks the bus limitations that the slot is on from the BIOS.
 900  * This is used in deciding whether or not to power up the slot.
 901  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
 902  * same bus)
 903  * Parameters: slot
 904  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
 905  */
 906 static int check_limitations(struct slot *slot_cur)
 907 {
 908         u8 i;
 909         struct slot *tmp_slot;
 910         u8 count = 0;
 911         u8 limitation = 0;
 912 
 913         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
 914                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
 915                 if (!tmp_slot)
 916                         return -ENODEV;
 917                 if ((SLOT_PWRGD(tmp_slot->status)) &&
 918                                         !(SLOT_CONNECT(tmp_slot->status)))
 919                         count++;
 920         }
 921         get_cur_bus_info(&slot_cur);
 922         switch (slot_cur->bus_on->current_speed) {
 923         case BUS_SPEED_33:
 924                 limitation = slot_cur->bus_on->slots_at_33_conv;
 925                 break;
 926         case BUS_SPEED_66:
 927                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
 928                         limitation = slot_cur->bus_on->slots_at_66_pcix;
 929                 else
 930                         limitation = slot_cur->bus_on->slots_at_66_conv;
 931                 break;
 932         case BUS_SPEED_100:
 933                 limitation = slot_cur->bus_on->slots_at_100_pcix;
 934                 break;
 935         case BUS_SPEED_133:
 936                 limitation = slot_cur->bus_on->slots_at_133_pcix;
 937                 break;
 938         }
 939 
 940         if ((count + 1) > limitation)
 941                 return -EINVAL;
 942         return 0;
 943 }
 944 
 945 static inline void print_card_capability(struct slot *slot_cur)
 946 {
 947         info("capability of the card is ");
 948         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
 949                 info("   133 MHz PCI-X\n");
 950         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
 951                 info("    66 MHz PCI-X\n");
 952         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
 953                 info("    66 MHz PCI\n");
 954         else
 955                 info("    33 MHz PCI\n");
 956 
 957 }
 958 
 959 /* This routine will power on the slot, configure the device(s) and find the
 960  * drivers for them.
 961  * Parameters: hotplug_slot
 962  * Returns: 0 or failure codes
 963  */
 964 static int enable_slot(struct hotplug_slot *hs)
 965 {
 966         int rc, i, rcpr;
 967         struct slot *slot_cur;
 968         u8 function;
 969         struct pci_func *tmp_func;
 970 
 971         ibmphp_lock_operations();
 972 
 973         debug("ENABLING SLOT........\n");
 974         slot_cur = to_slot(hs);
 975 
 976         rc = validate(slot_cur, ENABLE);
 977         if (rc) {
 978                 err("validate function failed\n");
 979                 goto error_nopower;
 980         }
 981 
 982         attn_LED_blink(slot_cur);
 983 
 984         rc = set_bus(slot_cur);
 985         if (rc) {
 986                 err("was not able to set the bus\n");
 987                 goto error_nopower;
 988         }
 989 
 990         /*-----------------debugging------------------------------*/
 991         get_cur_bus_info(&slot_cur);
 992         debug("the current bus speed right after set_bus = %x\n",
 993                                         slot_cur->bus_on->current_speed);
 994         /*----------------------------------------------------------*/
 995 
 996         rc = check_limitations(slot_cur);
 997         if (rc) {
 998                 err("Adding this card exceeds the limitations of this bus.\n");
 999                 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1000                 err("Try hot-adding into another bus\n");
1001                 rc = -EINVAL;
1002                 goto error_nopower;
1003         }
1004 
1005         rc = power_on(slot_cur);
1006 
1007         if (rc) {
1008                 err("something wrong when powering up... please see below for details\n");
1009                 /* need to turn off before on, otherwise, blinking overwrites */
1010                 attn_off(slot_cur);
1011                 attn_on(slot_cur);
1012                 if (slot_update(&slot_cur)) {
1013                         attn_off(slot_cur);
1014                         attn_on(slot_cur);
1015                         rc = -ENODEV;
1016                         goto exit;
1017                 }
1018                 /* Check to see the error of why it failed */
1019                 if ((SLOT_POWER(slot_cur->status)) &&
1020                                         !(SLOT_PWRGD(slot_cur->status)))
1021                         err("power fault occurred trying to power up\n");
1022                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1023                         err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1024                         print_card_capability(slot_cur);
1025                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1026                         err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1027                         print_card_capability(slot_cur);
1028                 }
1029                 ibmphp_update_slot_info(slot_cur);
1030                 goto exit;
1031         }
1032         debug("after power_on\n");
1033         /*-----------------------debugging---------------------------*/
1034         get_cur_bus_info(&slot_cur);
1035         debug("the current bus speed right after power_on = %x\n",
1036                                         slot_cur->bus_on->current_speed);
1037         /*----------------------------------------------------------*/
1038 
1039         rc = slot_update(&slot_cur);
1040         if (rc)
1041                 goto error_power;
1042 
1043         rc = -EINVAL;
1044         if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1045                 err("power fault occurred trying to power up...\n");
1046                 goto error_power;
1047         }
1048         if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1049                 err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1050                 print_card_capability(slot_cur);
1051                 goto error_power;
1052         }
1053         /* Don't think this case will happen after above checks...
1054          * but just in case, for paranoia sake */
1055         if (!(SLOT_POWER(slot_cur->status))) {
1056                 err("power on failed...\n");
1057                 goto error_power;
1058         }
1059 
1060         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1061         if (!slot_cur->func) {
1062                 /* do update_slot_info here? */
1063                 rc = -ENOMEM;
1064                 goto error_power;
1065         }
1066         slot_cur->func->busno = slot_cur->bus;
1067         slot_cur->func->device = slot_cur->device;
1068         for (i = 0; i < 4; i++)
1069                 slot_cur->func->irq[i] = slot_cur->irq[i];
1070 
1071         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1072                                         slot_cur->bus, slot_cur->device);
1073 
1074         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1075                 err("configure_card was unsuccessful...\n");
1076                 /* true because don't need to actually deallocate resources,
1077                  * just remove references */
1078                 ibmphp_unconfigure_card(&slot_cur, 1);
1079                 debug("after unconfigure_card\n");
1080                 slot_cur->func = NULL;
1081                 rc = -ENOMEM;
1082                 goto error_power;
1083         }
1084 
1085         function = 0x00;
1086         do {
1087                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1088                                                         function++);
1089                 if (tmp_func && !(tmp_func->dev))
1090                         ibm_configure_device(tmp_func);
1091         } while (tmp_func);
1092 
1093         attn_off(slot_cur);
1094         if (slot_update(&slot_cur)) {
1095                 rc = -EFAULT;
1096                 goto exit;
1097         }
1098         ibmphp_print_test();
1099         rc = ibmphp_update_slot_info(slot_cur);
1100 exit:
1101         ibmphp_unlock_operations();
1102         return rc;
1103 
1104 error_nopower:
1105         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1106         attn_on(slot_cur);
1107 error_cont:
1108         rcpr = slot_update(&slot_cur);
1109         if (rcpr) {
1110                 rc = rcpr;
1111                 goto exit;
1112         }
1113         ibmphp_update_slot_info(slot_cur);
1114         goto exit;
1115 
1116 error_power:
1117         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1118         attn_on(slot_cur);
1119         rcpr = power_off(slot_cur);
1120         if (rcpr) {
1121                 rc = rcpr;
1122                 goto exit;
1123         }
1124         goto error_cont;
1125 }
1126 
1127 /**************************************************************
1128 * HOT REMOVING ADAPTER CARD                                   *
1129 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1130 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1131 *               DISABLE POWER ,                               *
1132 **************************************************************/
1133 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1134 {
1135         struct slot *slot = to_slot(hotplug_slot);
1136         int rc;
1137 
1138         ibmphp_lock_operations();
1139         rc = ibmphp_do_disable_slot(slot);
1140         ibmphp_unlock_operations();
1141         return rc;
1142 }
1143 
1144 int ibmphp_do_disable_slot(struct slot *slot_cur)
1145 {
1146         int rc;
1147         u8 flag;
1148 
1149         debug("DISABLING SLOT...\n");
1150 
1151         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1152                 return -ENODEV;
1153 
1154         flag = slot_cur->flag;
1155         slot_cur->flag = 1;
1156 
1157         if (flag == 1) {
1158                 rc = validate(slot_cur, DISABLE);
1159                         /* checking if powered off already & valid slot # */
1160                 if (rc)
1161                         goto error;
1162         }
1163         attn_LED_blink(slot_cur);
1164 
1165         if (slot_cur->func == NULL) {
1166                 /* We need this for functions that were there on bootup */
1167                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1168                 if (!slot_cur->func) {
1169                         rc = -ENOMEM;
1170                         goto error;
1171                 }
1172                 slot_cur->func->busno = slot_cur->bus;
1173                 slot_cur->func->device = slot_cur->device;
1174         }
1175 
1176         ibm_unconfigure_device(slot_cur->func);
1177 
1178         /*
1179          * If we got here from latch suddenly opening on operating card or
1180          * a power fault, there's no power to the card, so cannot
1181          * read from it to determine what resources it occupied.  This operation
1182          * is forbidden anyhow.  The best we can do is remove it from kernel
1183          * lists at least */
1184 
1185         if (!flag) {
1186                 attn_off(slot_cur);
1187                 return 0;
1188         }
1189 
1190         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1191         slot_cur->func = NULL;
1192         debug("in disable_slot. after unconfigure_card\n");
1193         if (rc) {
1194                 err("could not unconfigure card.\n");
1195                 goto error;
1196         }
1197 
1198         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1199         if (rc)
1200                 goto error;
1201 
1202         attn_off(slot_cur);
1203         rc = slot_update(&slot_cur);
1204         if (rc)
1205                 goto exit;
1206 
1207         rc = ibmphp_update_slot_info(slot_cur);
1208         ibmphp_print_test();
1209 exit:
1210         return rc;
1211 
1212 error:
1213         /*  Need to turn off if was blinking b4 */
1214         attn_off(slot_cur);
1215         attn_on(slot_cur);
1216         if (slot_update(&slot_cur)) {
1217                 rc = -EFAULT;
1218                 goto exit;
1219         }
1220         if (flag)
1221                 ibmphp_update_slot_info(slot_cur);
1222         goto exit;
1223 }
1224 
1225 const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1226         .set_attention_status =         set_attention_status,
1227         .enable_slot =                  enable_slot,
1228         .disable_slot =                 ibmphp_disable_slot,
1229         .hardware_test =                NULL,
1230         .get_power_status =             get_power_status,
1231         .get_attention_status =         get_attention_status,
1232         .get_latch_status =             get_latch_status,
1233         .get_adapter_status =           get_adapter_present,
1234 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1235         .get_bus_name_status =          get_bus_name,
1236 */
1237 };
1238 
1239 static void ibmphp_unload(void)
1240 {
1241         free_slots();
1242         debug("after slots\n");
1243         ibmphp_free_resources();
1244         debug("after resources\n");
1245         ibmphp_free_bus_info_queue();
1246         debug("after bus info\n");
1247         ibmphp_free_ebda_hpc_queue();
1248         debug("after ebda hpc\n");
1249         ibmphp_free_ebda_pci_rsrc_queue();
1250         debug("after ebda pci rsrc\n");
1251         kfree(ibmphp_pci_bus);
1252 }
1253 
1254 static int __init ibmphp_init(void)
1255 {
1256         struct pci_bus *bus;
1257         int i = 0;
1258         int rc = 0;
1259 
1260         init_flag = 1;
1261 
1262         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1263 
1264         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1265         if (!ibmphp_pci_bus) {
1266                 rc = -ENOMEM;
1267                 goto exit;
1268         }
1269 
1270         bus = pci_find_bus(0, 0);
1271         if (!bus) {
1272                 err("Can't find the root pci bus, can not continue\n");
1273                 rc = -ENODEV;
1274                 goto error;
1275         }
1276         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1277 
1278         ibmphp_debug = debug;
1279 
1280         for (i = 0; i < 16; i++)
1281                 irqs[i] = 0;
1282 
1283         rc = ibmphp_access_ebda();
1284         if (rc)
1285                 goto error;
1286         debug("after ibmphp_access_ebda()\n");
1287 
1288         rc = ibmphp_rsrc_init();
1289         if (rc)
1290                 goto error;
1291         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1292 
1293         max_slots = get_max_slots();
1294 
1295         rc = ibmphp_register_pci();
1296         if (rc)
1297                 goto error;
1298 
1299         if (init_ops()) {
1300                 rc = -ENODEV;
1301                 goto error;
1302         }
1303 
1304         ibmphp_print_test();
1305         rc = ibmphp_hpc_start_poll_thread();
1306         if (rc)
1307                 goto error;
1308 
1309 exit:
1310         return rc;
1311 
1312 error:
1313         ibmphp_unload();
1314         goto exit;
1315 }
1316 
1317 static void __exit ibmphp_exit(void)
1318 {
1319         ibmphp_hpc_stop_poll_thread();
1320         debug("after polling\n");
1321         ibmphp_unload();
1322         debug("done\n");
1323 }
1324 
1325 module_init(ibmphp_init);
1326 module_exit(ibmphp_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/pci/hotplug/ibmphp_core.c

DEFINITIONS
