linux/drivers/pci/hotplug/ibmphp_ebda.c
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   1/*
   2 * IBM Hot Plug Controller Driver
   3 *
   4 * Written By: Tong Yu, 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/module.h>
  31#include <linux/errno.h>
  32#include <linux/mm.h>
  33#include <linux/slab.h>
  34#include <linux/pci.h>
  35#include <linux/list.h>
  36#include <linux/init.h>
  37#include "ibmphp.h"
  38
  39/*
  40 * POST builds data blocks(in this data block definition, a char-1
  41 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
  42 * BIOS Data Area which describe the configuration of the hot-plug
  43 * controllers and resources used by the PCI Hot-Plug devices.
  44 *
  45 * This file walks EBDA, maps data block from physical addr,
  46 * reconstruct linked lists about all system resource(MEM, PFM, IO)
  47 * already assigned by POST, as well as linked lists about hot plug
  48 * controllers (ctlr#, slot#, bus&slot features...)
  49 */
  50
  51/* Global lists */
  52LIST_HEAD (ibmphp_ebda_pci_rsrc_head);
  53LIST_HEAD (ibmphp_slot_head);
  54
  55/* Local variables */
  56static struct ebda_hpc_list *hpc_list_ptr;
  57static struct ebda_rsrc_list *rsrc_list_ptr;
  58static struct rio_table_hdr *rio_table_ptr = NULL;
  59static LIST_HEAD (ebda_hpc_head);
  60static LIST_HEAD (bus_info_head);
  61static LIST_HEAD (rio_vg_head);
  62static LIST_HEAD (rio_lo_head);
  63static LIST_HEAD (opt_vg_head);
  64static LIST_HEAD (opt_lo_head);
  65static void __iomem *io_mem;
  66
  67/* Local functions */
  68static int ebda_rsrc_controller (void);
  69static int ebda_rsrc_rsrc (void);
  70static int ebda_rio_table (void);
  71
  72static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void)
  73{
  74        return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
  75}
  76
  77static struct controller *alloc_ebda_hpc (u32 slot_count, u32 bus_count)
  78{
  79        struct controller *controller;
  80        struct ebda_hpc_slot *slots;
  81        struct ebda_hpc_bus *buses;
  82
  83        controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
  84        if (!controller)
  85                goto error;
  86
  87        slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
  88        if (!slots)
  89                goto error_contr;
  90        controller->slots = slots;
  91
  92        buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
  93        if (!buses)
  94                goto error_slots;
  95        controller->buses = buses;
  96
  97        return controller;
  98error_slots:
  99        kfree(controller->slots);
 100error_contr:
 101        kfree(controller);
 102error:
 103        return NULL;
 104}
 105
 106static void free_ebda_hpc (struct controller *controller)
 107{
 108        kfree (controller->slots);
 109        kfree (controller->buses);
 110        kfree (controller);
 111}
 112
 113static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void)
 114{
 115        return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
 116}
 117
 118static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void)
 119{
 120        return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
 121}
 122
 123static void __init print_bus_info (void)
 124{
 125        struct bus_info *ptr;
 126        
 127        list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
 128                debug ("%s - slot_min = %x\n", __func__, ptr->slot_min);
 129                debug ("%s - slot_max = %x\n", __func__, ptr->slot_max);
 130                debug ("%s - slot_count = %x\n", __func__, ptr->slot_count);
 131                debug ("%s - bus# = %x\n", __func__, ptr->busno);
 132                debug ("%s - current_speed = %x\n", __func__, ptr->current_speed);
 133                debug ("%s - controller_id = %x\n", __func__, ptr->controller_id);
 134                
 135                debug ("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
 136                debug ("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
 137                debug ("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
 138                debug ("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
 139                debug ("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
 140
 141        }
 142}
 143
 144static void print_lo_info (void)
 145{
 146        struct rio_detail *ptr;
 147        debug ("print_lo_info ----\n"); 
 148        list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
 149                debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
 150                debug ("%s - rio_type = %x\n", __func__, ptr->rio_type);
 151                debug ("%s - owner_id = %x\n", __func__, ptr->owner_id);
 152                debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
 153                debug ("%s - wpindex = %x\n", __func__, ptr->wpindex);
 154                debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
 155
 156        }
 157}
 158
 159static void print_vg_info (void)
 160{
 161        struct rio_detail *ptr;
 162        debug ("%s ---\n", __func__);
 163        list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
 164                debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
 165                debug ("%s - rio_type = %x\n", __func__, ptr->rio_type);
 166                debug ("%s - owner_id = %x\n", __func__, ptr->owner_id);
 167                debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
 168                debug ("%s - wpindex = %x\n", __func__, ptr->wpindex);
 169                debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
 170
 171        }
 172}
 173
 174static void __init print_ebda_pci_rsrc (void)
 175{
 176        struct ebda_pci_rsrc *ptr;
 177
 178        list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
 179                debug ("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
 180                        __func__, ptr->rsrc_type ,ptr->bus_num, ptr->dev_fun,ptr->start_addr, ptr->end_addr);
 181        }
 182}
 183
 184static void __init print_ibm_slot (void)
 185{
 186        struct slot *ptr;
 187
 188        list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
 189                debug ("%s - slot_number: %x\n", __func__, ptr->number);
 190        }
 191}
 192
 193static void __init print_opt_vg (void)
 194{
 195        struct opt_rio *ptr;
 196        debug ("%s ---\n", __func__);
 197        list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
 198                debug ("%s - rio_type %x\n", __func__, ptr->rio_type);
 199                debug ("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
 200                debug ("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
 201                debug ("%s - middle_num: %x\n", __func__, ptr->middle_num);
 202        }
 203}
 204
 205static void __init print_ebda_hpc (void)
 206{
 207        struct controller *hpc_ptr;
 208        u16 index;
 209
 210        list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
 211                for (index = 0; index < hpc_ptr->slot_count; index++) {
 212                        debug ("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
 213                        debug ("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
 214                        debug ("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
 215                        debug ("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
 216                }
 217
 218                for (index = 0; index < hpc_ptr->bus_count; index++) {
 219                        debug ("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
 220                }
 221
 222                debug ("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
 223                switch (hpc_ptr->ctlr_type) {
 224                case 1:
 225                        debug ("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
 226                        debug ("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
 227                        debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
 228                        break;
 229
 230                case 0:
 231                        debug ("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
 232                        debug ("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
 233                        debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
 234                        break;
 235
 236                case 2:
 237                case 4:
 238                        debug ("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
 239                        debug ("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
 240                        debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
 241                        break;
 242                }
 243        }
 244}
 245
 246int __init ibmphp_access_ebda (void)
 247{
 248        u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
 249        u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
 250        int rc = 0;
 251
 252
 253        rio_complete = 0;
 254        hs_complete = 0;
 255
 256        io_mem = ioremap ((0x40 << 4) + 0x0e, 2);
 257        if (!io_mem )
 258                return -ENOMEM;
 259        ebda_seg = readw (io_mem);
 260        iounmap (io_mem);
 261        debug ("returned ebda segment: %x\n", ebda_seg);
 262        
 263        io_mem = ioremap(ebda_seg<<4, 1);
 264        if (!io_mem)
 265                return -ENOMEM;
 266        ebda_sz = readb(io_mem);
 267        iounmap(io_mem);
 268        debug("ebda size: %d(KiB)\n", ebda_sz);
 269        if (ebda_sz == 0)
 270                return -ENOMEM;
 271
 272        io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
 273        if (!io_mem )
 274                return -ENOMEM;
 275        next_offset = 0x180;
 276
 277        for (;;) {
 278                offset = next_offset;
 279
 280                /* Make sure what we read is still in the mapped section */
 281                if (WARN(offset > (ebda_sz * 1024 - 4),
 282                         "ibmphp_ebda: next read is beyond ebda_sz\n"))
 283                        break;
 284
 285                next_offset = readw (io_mem + offset);  /* offset of next blk */
 286
 287                offset += 2;
 288                if (next_offset == 0)   /* 0 indicate it's last blk */
 289                        break;
 290                blk_id = readw (io_mem + offset);       /* this blk id */
 291
 292                offset += 2;
 293                /* check if it is hot swap block or rio block */
 294                if (blk_id != 0x4853 && blk_id != 0x4752)
 295                        continue;
 296                /* found hs table */
 297                if (blk_id == 0x4853) {
 298                        debug ("now enter hot swap block---\n");
 299                        debug ("hot blk id: %x\n", blk_id);
 300                        format = readb (io_mem + offset);
 301
 302                        offset += 1;
 303                        if (format != 4)
 304                                goto error_nodev;
 305                        debug ("hot blk format: %x\n", format);
 306                        /* hot swap sub blk */
 307                        base = offset;
 308
 309                        sub_addr = base;
 310                        re = readw (io_mem + sub_addr); /* next sub blk */
 311
 312                        sub_addr += 2;
 313                        rc_id = readw (io_mem + sub_addr);      /* sub blk id */
 314
 315                        sub_addr += 2;
 316                        if (rc_id != 0x5243)
 317                                goto error_nodev;
 318                        /* rc sub blk signature  */
 319                        num_ctlrs = readb (io_mem + sub_addr);
 320
 321                        sub_addr += 1;
 322                        hpc_list_ptr = alloc_ebda_hpc_list ();
 323                        if (!hpc_list_ptr) {
 324                                rc = -ENOMEM;
 325                                goto out;
 326                        }
 327                        hpc_list_ptr->format = format;
 328                        hpc_list_ptr->num_ctlrs = num_ctlrs;
 329                        hpc_list_ptr->phys_addr = sub_addr;     /*  offset of RSRC_CONTROLLER blk */
 330                        debug ("info about hpc descriptor---\n");
 331                        debug ("hot blk format: %x\n", format);
 332                        debug ("num of controller: %x\n", num_ctlrs);
 333                        debug ("offset of hpc data structure enteries: %x\n ", sub_addr);
 334
 335                        sub_addr = base + re;   /* re sub blk */
 336                        /* FIXME: rc is never used/checked */
 337                        rc = readw (io_mem + sub_addr); /* next sub blk */
 338
 339                        sub_addr += 2;
 340                        re_id = readw (io_mem + sub_addr);      /* sub blk id */
 341
 342                        sub_addr += 2;
 343                        if (re_id != 0x5245)
 344                                goto error_nodev;
 345
 346                        /* signature of re */
 347                        num_entries = readw (io_mem + sub_addr);
 348
 349                        sub_addr += 2;  /* offset of RSRC_ENTRIES blk */
 350                        rsrc_list_ptr = alloc_ebda_rsrc_list ();
 351                        if (!rsrc_list_ptr ) {
 352                                rc = -ENOMEM;
 353                                goto out;
 354                        }
 355                        rsrc_list_ptr->format = format;
 356                        rsrc_list_ptr->num_entries = num_entries;
 357                        rsrc_list_ptr->phys_addr = sub_addr;
 358
 359                        debug ("info about rsrc descriptor---\n");
 360                        debug ("format: %x\n", format);
 361                        debug ("num of rsrc: %x\n", num_entries);
 362                        debug ("offset of rsrc data structure enteries: %x\n ", sub_addr);
 363
 364                        hs_complete = 1;
 365                } else {
 366                /* found rio table, blk_id == 0x4752 */
 367                        debug ("now enter io table ---\n");
 368                        debug ("rio blk id: %x\n", blk_id);
 369
 370                        rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
 371                        if (!rio_table_ptr)
 372                                return -ENOMEM; 
 373                        rio_table_ptr->ver_num = readb (io_mem + offset);
 374                        rio_table_ptr->scal_count = readb (io_mem + offset + 1);
 375                        rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
 376                        rio_table_ptr->offset = offset +3 ;
 377                        
 378                        debug("info about rio table hdr ---\n");
 379                        debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
 380                                rio_table_ptr->ver_num, rio_table_ptr->scal_count,
 381                                rio_table_ptr->riodev_count, rio_table_ptr->offset);
 382
 383                        rio_complete = 1;
 384                }
 385        }
 386
 387        if (!hs_complete && !rio_complete)
 388                goto error_nodev;
 389
 390        if (rio_table_ptr) {
 391                if (rio_complete && rio_table_ptr->ver_num == 3) {
 392                        rc = ebda_rio_table ();
 393                        if (rc)
 394                                goto out;
 395                }
 396        }
 397        rc = ebda_rsrc_controller ();
 398        if (rc)
 399                goto out;
 400
 401        rc = ebda_rsrc_rsrc ();
 402        goto out;
 403error_nodev:
 404        rc = -ENODEV;
 405out:
 406        iounmap (io_mem);
 407        return rc;
 408}
 409
 410/*
 411 * map info of scalability details and rio details from physical address
 412 */
 413static int __init ebda_rio_table (void)
 414{
 415        u16 offset;
 416        u8 i;
 417        struct rio_detail *rio_detail_ptr;
 418
 419        offset = rio_table_ptr->offset;
 420        offset += 12 * rio_table_ptr->scal_count;
 421
 422        // we do concern about rio details
 423        for (i = 0; i < rio_table_ptr->riodev_count; i++) {
 424                rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
 425                if (!rio_detail_ptr)
 426                        return -ENOMEM;
 427                rio_detail_ptr->rio_node_id = readb (io_mem + offset);
 428                rio_detail_ptr->bbar = readl (io_mem + offset + 1);
 429                rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
 430                rio_detail_ptr->owner_id = readb (io_mem + offset + 6);
 431                rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7);
 432                rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8);
 433                rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9);
 434                rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10);
 435                rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11);
 436                rio_detail_ptr->status = readb (io_mem + offset + 12);
 437                rio_detail_ptr->wpindex = readb (io_mem + offset + 13);
 438                rio_detail_ptr->chassis_num = readb (io_mem + offset + 14);
 439//              debug ("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
 440                //create linked list of chassis
 441                if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5) 
 442                        list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head);
 443                //create linked list of expansion box                           
 444                else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7) 
 445                        list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head);
 446                else 
 447                        // not in my concern
 448                        kfree (rio_detail_ptr);
 449                offset += 15;
 450        }
 451        print_lo_info ();
 452        print_vg_info ();
 453        return 0;
 454}
 455
 456/*
 457 * reorganizing linked list of chassis   
 458 */
 459static struct opt_rio *search_opt_vg (u8 chassis_num)
 460{
 461        struct opt_rio *ptr;
 462        list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
 463                if (ptr->chassis_num == chassis_num)
 464                        return ptr;
 465        }               
 466        return NULL;
 467}
 468
 469static int __init combine_wpg_for_chassis (void)
 470{
 471        struct opt_rio *opt_rio_ptr = NULL;
 472        struct rio_detail *rio_detail_ptr = NULL;
 473        
 474        list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
 475                opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
 476                if (!opt_rio_ptr) {
 477                        opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
 478                        if (!opt_rio_ptr)
 479                                return -ENOMEM;
 480                        opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
 481                        opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
 482                        opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 483                        opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
 484                        list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head);
 485                } else {        
 486                        opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 487                        opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
 488                }       
 489        }
 490        print_opt_vg ();
 491        return 0;       
 492}       
 493
 494/*
 495 * reorganizing linked list of expansion box
 496 */
 497static struct opt_rio_lo *search_opt_lo (u8 chassis_num)
 498{
 499        struct opt_rio_lo *ptr;
 500        list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
 501                if (ptr->chassis_num == chassis_num)
 502                        return ptr;
 503        }               
 504        return NULL;
 505}
 506
 507static int combine_wpg_for_expansion (void)
 508{
 509        struct opt_rio_lo *opt_rio_lo_ptr = NULL;
 510        struct rio_detail *rio_detail_ptr = NULL;
 511        
 512        list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
 513                opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
 514                if (!opt_rio_lo_ptr) {
 515                        opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
 516                        if (!opt_rio_lo_ptr)
 517                                return -ENOMEM;
 518                        opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
 519                        opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
 520                        opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 521                        opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
 522                        opt_rio_lo_ptr->pack_count = 1;
 523                        
 524                        list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
 525                } else {        
 526                        opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 527                        opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
 528                        opt_rio_lo_ptr->pack_count = 2;
 529                }       
 530        }
 531        return 0;       
 532}
 533        
 534
 535/* Since we don't know the max slot number per each chassis, hence go
 536 * through the list of all chassis to find out the range
 537 * Arguments: slot_num, 1st slot number of the chassis we think we are on, 
 538 * var (0 = chassis, 1 = expansion box) 
 539 */
 540static int first_slot_num (u8 slot_num, u8 first_slot, u8 var)
 541{
 542        struct opt_rio *opt_vg_ptr = NULL;
 543        struct opt_rio_lo *opt_lo_ptr = NULL;
 544        int rc = 0;
 545
 546        if (!var) {
 547                list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 548                        if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) { 
 549                                rc = -ENODEV;
 550                                break;
 551                        }
 552                }
 553        } else {
 554                list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 555                        if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
 556                                rc = -ENODEV;
 557                                break;
 558                        }
 559                }
 560        }
 561        return rc;
 562}
 563
 564static struct opt_rio_lo * find_rxe_num (u8 slot_num)
 565{
 566        struct opt_rio_lo *opt_lo_ptr;
 567
 568        list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 569                //check to see if this slot_num belongs to expansion box
 570                if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1))) 
 571                        return opt_lo_ptr;
 572        }
 573        return NULL;
 574}
 575
 576static struct opt_rio * find_chassis_num (u8 slot_num)
 577{
 578        struct opt_rio *opt_vg_ptr;
 579
 580        list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 581                //check to see if this slot_num belongs to chassis 
 582                if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0))) 
 583                        return opt_vg_ptr;
 584        }
 585        return NULL;
 586}
 587
 588/* This routine will find out how many slots are in the chassis, so that
 589 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
 590 */
 591static u8 calculate_first_slot (u8 slot_num)
 592{
 593        u8 first_slot = 1;
 594        struct slot * slot_cur;
 595        
 596        list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 597                if (slot_cur->ctrl) {
 598                        if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num)) 
 599                                first_slot = slot_cur->ctrl->ending_slot_num;
 600                }
 601        }                       
 602        return first_slot + 1;
 603
 604}
 605
 606#define SLOT_NAME_SIZE 30
 607
 608static char *create_file_name (struct slot * slot_cur)
 609{
 610        struct opt_rio *opt_vg_ptr = NULL;
 611        struct opt_rio_lo *opt_lo_ptr = NULL;
 612        static char str[SLOT_NAME_SIZE];
 613        int which = 0; /* rxe = 1, chassis = 0 */
 614        u8 number = 1; /* either chassis or rxe # */
 615        u8 first_slot = 1;
 616        u8 slot_num;
 617        u8 flag = 0;
 618
 619        if (!slot_cur) {
 620                err ("Structure passed is empty\n");
 621                return NULL;
 622        }
 623        
 624        slot_num = slot_cur->number;
 625
 626        memset (str, 0, sizeof(str));
 627        
 628        if (rio_table_ptr) {
 629                if (rio_table_ptr->ver_num == 3) {
 630                        opt_vg_ptr = find_chassis_num (slot_num);
 631                        opt_lo_ptr = find_rxe_num (slot_num);
 632                }
 633        }
 634        if (opt_vg_ptr) {
 635                if (opt_lo_ptr) {
 636                        if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
 637                                number = opt_lo_ptr->chassis_num;
 638                                first_slot = opt_lo_ptr->first_slot_num;
 639                                which = 1; /* it is RXE */
 640                        } else {
 641                                first_slot = opt_vg_ptr->first_slot_num;
 642                                number = opt_vg_ptr->chassis_num;
 643                                which = 0;
 644                        }
 645                } else {
 646                        first_slot = opt_vg_ptr->first_slot_num;
 647                        number = opt_vg_ptr->chassis_num;
 648                        which = 0;
 649                }
 650                ++flag;
 651        } else if (opt_lo_ptr) {
 652                number = opt_lo_ptr->chassis_num;
 653                first_slot = opt_lo_ptr->first_slot_num;
 654                which = 1;
 655                ++flag;
 656        } else if (rio_table_ptr) {
 657                if (rio_table_ptr->ver_num == 3) {
 658                        /* if both NULL and we DO have correct RIO table in BIOS */
 659                        return NULL;
 660                }
 661        } 
 662        if (!flag) {
 663                if (slot_cur->ctrl->ctlr_type == 4) {
 664                        first_slot = calculate_first_slot (slot_num);
 665                        which = 1;
 666                } else {
 667                        which = 0;
 668                }
 669        }
 670
 671        sprintf(str, "%s%dslot%d",
 672                which == 0 ? "chassis" : "rxe",
 673                number, slot_num - first_slot + 1);
 674        return str;
 675}
 676
 677static int fillslotinfo(struct hotplug_slot *hotplug_slot)
 678{
 679        struct slot *slot;
 680        int rc = 0;
 681
 682        if (!hotplug_slot || !hotplug_slot->private)
 683                return -EINVAL;
 684
 685        slot = hotplug_slot->private;
 686        rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
 687        if (rc)
 688                return rc;
 689
 690        // power - enabled:1  not:0
 691        hotplug_slot->info->power_status = SLOT_POWER(slot->status);
 692
 693        // attention - off:0, on:1, blinking:2
 694        hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
 695
 696        // latch - open:1 closed:0
 697        hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
 698
 699        // pci board - present:1 not:0
 700        if (SLOT_PRESENT (slot->status))
 701                hotplug_slot->info->adapter_status = 1;
 702        else
 703                hotplug_slot->info->adapter_status = 0;
 704/*
 705        if (slot->bus_on->supported_bus_mode
 706                && (slot->bus_on->supported_speed == BUS_SPEED_66))
 707                hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
 708        else
 709                hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
 710*/
 711
 712        return rc;
 713}
 714
 715static void release_slot(struct hotplug_slot *hotplug_slot)
 716{
 717        struct slot *slot;
 718
 719        if (!hotplug_slot || !hotplug_slot->private)
 720                return;
 721
 722        slot = hotplug_slot->private;
 723        kfree(slot->hotplug_slot->info);
 724        kfree(slot->hotplug_slot);
 725        slot->ctrl = NULL;
 726        slot->bus_on = NULL;
 727
 728        /* we don't want to actually remove the resources, since free_resources will do just that */
 729        ibmphp_unconfigure_card(&slot, -1);
 730
 731        kfree (slot);
 732}
 733
 734static struct pci_driver ibmphp_driver;
 735
 736/*
 737 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
 738 * each hpc from physical address to a list of hot plug controllers based on
 739 * hpc descriptors.
 740 */
 741static int __init ebda_rsrc_controller (void)
 742{
 743        u16 addr, addr_slot, addr_bus;
 744        u8 ctlr_id, temp, bus_index;
 745        u16 ctlr, slot, bus;
 746        u16 slot_num, bus_num, index;
 747        struct hotplug_slot *hp_slot_ptr;
 748        struct controller *hpc_ptr;
 749        struct ebda_hpc_bus *bus_ptr;
 750        struct ebda_hpc_slot *slot_ptr;
 751        struct bus_info *bus_info_ptr1, *bus_info_ptr2;
 752        int rc;
 753        struct slot *tmp_slot;
 754        char name[SLOT_NAME_SIZE];
 755
 756        addr = hpc_list_ptr->phys_addr;
 757        for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
 758                bus_index = 1;
 759                ctlr_id = readb (io_mem + addr);
 760                addr += 1;
 761                slot_num = readb (io_mem + addr);
 762
 763                addr += 1;
 764                addr_slot = addr;       /* offset of slot structure */
 765                addr += (slot_num * 4);
 766
 767                bus_num = readb (io_mem + addr);
 768
 769                addr += 1;
 770                addr_bus = addr;        /* offset of bus */
 771                addr += (bus_num * 9);  /* offset of ctlr_type */
 772                temp = readb (io_mem + addr);
 773
 774                addr += 1;
 775                /* init hpc structure */
 776                hpc_ptr = alloc_ebda_hpc (slot_num, bus_num);
 777                if (!hpc_ptr ) {
 778                        rc = -ENOMEM;
 779                        goto error_no_hpc;
 780                }
 781                hpc_ptr->ctlr_id = ctlr_id;
 782                hpc_ptr->ctlr_relative_id = ctlr;
 783                hpc_ptr->slot_count = slot_num;
 784                hpc_ptr->bus_count = bus_num;
 785                debug ("now enter ctlr data struture ---\n");
 786                debug ("ctlr id: %x\n", ctlr_id);
 787                debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
 788                debug ("count of slots controlled by this ctlr: %x\n", slot_num);
 789                debug ("count of buses controlled by this ctlr: %x\n", bus_num);
 790
 791                /* init slot structure, fetch slot, bus, cap... */
 792                slot_ptr = hpc_ptr->slots;
 793                for (slot = 0; slot < slot_num; slot++) {
 794                        slot_ptr->slot_num = readb (io_mem + addr_slot);
 795                        slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num);
 796                        slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num);
 797                        slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num);
 798
 799                        // create bus_info lined list --- if only one slot per bus: slot_min = slot_max 
 800
 801                        bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
 802                        if (!bus_info_ptr2) {
 803                                bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
 804                                if (!bus_info_ptr1) {
 805                                        rc = -ENOMEM;
 806                                        goto error_no_hp_slot;
 807                                }
 808                                bus_info_ptr1->slot_min = slot_ptr->slot_num;
 809                                bus_info_ptr1->slot_max = slot_ptr->slot_num;
 810                                bus_info_ptr1->slot_count += 1;
 811                                bus_info_ptr1->busno = slot_ptr->slot_bus_num;
 812                                bus_info_ptr1->index = bus_index++;
 813                                bus_info_ptr1->current_speed = 0xff;
 814                                bus_info_ptr1->current_bus_mode = 0xff;
 815                                
 816                                bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
 817                                
 818                                list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head);
 819
 820                        } else {
 821                                bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num);
 822                                bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num);
 823                                bus_info_ptr2->slot_count += 1;
 824
 825                        }
 826
 827                        // end of creating the bus_info linked list
 828
 829                        slot_ptr++;
 830                        addr_slot += 1;
 831                }
 832
 833                /* init bus structure */
 834                bus_ptr = hpc_ptr->buses;
 835                for (bus = 0; bus < bus_num; bus++) {
 836                        bus_ptr->bus_num = readb (io_mem + addr_bus + bus);
 837                        bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus);
 838                        bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1);
 839
 840                        bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2);
 841
 842                        bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3);
 843
 844                        bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4);
 845
 846                        bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num);
 847                        if (bus_info_ptr2) {
 848                                bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
 849                                bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
 850                                bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
 851                                bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
 852                                bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 
 853                        }
 854                        bus_ptr++;
 855                }
 856
 857                hpc_ptr->ctlr_type = temp;
 858
 859                switch (hpc_ptr->ctlr_type) {
 860                        case 1:
 861                                hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr);
 862                                hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
 863                                hpc_ptr->irq = readb (io_mem + addr + 2);
 864                                addr += 3;
 865                                debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 
 866                                        hpc_ptr->u.pci_ctlr.bus,
 867                                        hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
 868                                break;
 869
 870                        case 0:
 871                                hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr);
 872                                hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2);
 873                                if (!request_region (hpc_ptr->u.isa_ctlr.io_start,
 874                                                     (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
 875                                                     "ibmphp")) {
 876                                        rc = -ENODEV;
 877                                        goto error_no_hp_slot;
 878                                }
 879                                hpc_ptr->irq = readb (io_mem + addr + 4);
 880                                addr += 5;
 881                                break;
 882
 883                        case 2:
 884                        case 4:
 885                                hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr);
 886                                hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4);
 887                                hpc_ptr->irq = readb (io_mem + addr + 5);
 888                                addr += 6;
 889                                break;
 890                        default:
 891                                rc = -ENODEV;
 892                                goto error_no_hp_slot;
 893                }
 894
 895                //reorganize chassis' linked list
 896                combine_wpg_for_chassis ();
 897                combine_wpg_for_expansion ();
 898                hpc_ptr->revision = 0xff;
 899                hpc_ptr->options = 0xff;
 900                hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
 901                hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
 902
 903                // register slots with hpc core as well as create linked list of ibm slot
 904                for (index = 0; index < hpc_ptr->slot_count; index++) {
 905
 906                        hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
 907                        if (!hp_slot_ptr) {
 908                                rc = -ENOMEM;
 909                                goto error_no_hp_slot;
 910                        }
 911
 912                        hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 913                        if (!hp_slot_ptr->info) {
 914                                rc = -ENOMEM;
 915                                goto error_no_hp_info;
 916                        }
 917
 918                        tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
 919                        if (!tmp_slot) {
 920                                rc = -ENOMEM;
 921                                goto error_no_slot;
 922                        }
 923
 924                        tmp_slot->flag = 1;
 925
 926                        tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
 927                        if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
 928                                tmp_slot->supported_speed =  3;
 929                        else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
 930                                tmp_slot->supported_speed =  2;
 931                        else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
 932                                tmp_slot->supported_speed =  1;
 933                                
 934                        if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
 935                                tmp_slot->supported_bus_mode = 1;
 936                        else
 937                                tmp_slot->supported_bus_mode = 0;
 938
 939
 940                        tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
 941
 942                        bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num);
 943                        if (!bus_info_ptr1) {
 944                                kfree(tmp_slot);
 945                                rc = -ENODEV;
 946                                goto error;
 947                        }
 948                        tmp_slot->bus_on = bus_info_ptr1;
 949                        bus_info_ptr1 = NULL;
 950                        tmp_slot->ctrl = hpc_ptr;
 951
 952                        tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
 953                        tmp_slot->number = hpc_ptr->slots[index].slot_num;
 954                        tmp_slot->hotplug_slot = hp_slot_ptr;
 955
 956                        hp_slot_ptr->private = tmp_slot;
 957                        hp_slot_ptr->release = release_slot;
 958
 959                        rc = fillslotinfo(hp_slot_ptr);
 960                        if (rc)
 961                                goto error;
 962
 963                        rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private);
 964                        if (rc)
 965                                goto error;
 966                        hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
 967
 968                        // end of registering ibm slot with hotplug core
 969
 970                        list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
 971                }
 972
 973                print_bus_info ();
 974                list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head );
 975
 976        }                       /* each hpc  */
 977
 978        list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
 979                snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
 980                pci_hp_register(tmp_slot->hotplug_slot,
 981                        pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
 982        }
 983
 984        print_ebda_hpc ();
 985        print_ibm_slot ();
 986        return 0;
 987
 988error:
 989        kfree (hp_slot_ptr->private);
 990error_no_slot:
 991        kfree (hp_slot_ptr->info);
 992error_no_hp_info:
 993        kfree (hp_slot_ptr);
 994error_no_hp_slot:
 995        free_ebda_hpc (hpc_ptr);
 996error_no_hpc:
 997        iounmap (io_mem);
 998        return rc;
 999}
1000
1001/* 
1002 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
1003 * pfm from the physical addr to a list of resource.
1004 */
1005static int __init ebda_rsrc_rsrc (void)
1006{
1007        u16 addr;
1008        short rsrc;
1009        u8 type, rsrc_type;
1010        struct ebda_pci_rsrc *rsrc_ptr;
1011
1012        addr = rsrc_list_ptr->phys_addr;
1013        debug ("now entering rsrc land\n");
1014        debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1015
1016        for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1017                type = readb (io_mem + addr);
1018
1019                addr += 1;
1020                rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1021
1022                if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1023                        rsrc_ptr = alloc_ebda_pci_rsrc ();
1024                        if (!rsrc_ptr) {
1025                                iounmap (io_mem);
1026                                return -ENOMEM;
1027                        }
1028                        rsrc_ptr->rsrc_type = type;
1029
1030                        rsrc_ptr->bus_num = readb (io_mem + addr);
1031                        rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1032                        rsrc_ptr->start_addr = readw (io_mem + addr + 2);
1033                        rsrc_ptr->end_addr = readw (io_mem + addr + 4);
1034                        addr += 6;
1035
1036                        debug ("rsrc from io type ----\n");
1037                        debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1038                                rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1039
1040                        list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1041                }
1042
1043                if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1044                        rsrc_ptr = alloc_ebda_pci_rsrc ();
1045                        if (!rsrc_ptr ) {
1046                                iounmap (io_mem);
1047                                return -ENOMEM;
1048                        }
1049                        rsrc_ptr->rsrc_type = type;
1050
1051                        rsrc_ptr->bus_num = readb (io_mem + addr);
1052                        rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1053                        rsrc_ptr->start_addr = readl (io_mem + addr + 2);
1054                        rsrc_ptr->end_addr = readl (io_mem + addr + 6);
1055                        addr += 10;
1056
1057                        debug ("rsrc from mem or pfm ---\n");
1058                        debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
1059                                rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1060
1061                        list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1062                }
1063        }
1064        kfree (rsrc_list_ptr);
1065        rsrc_list_ptr = NULL;
1066        print_ebda_pci_rsrc ();
1067        return 0;
1068}
1069
1070u16 ibmphp_get_total_controllers (void)
1071{
1072        return hpc_list_ptr->num_ctlrs;
1073}
1074
1075struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num)
1076{
1077        struct slot *slot;
1078
1079        list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1080                if (slot->number == physical_num)
1081                        return slot;
1082        }
1083        return NULL;
1084}
1085
1086/* To find:
1087 *      - the smallest slot number
1088 *      - the largest slot number
1089 *      - the total number of the slots based on each bus
1090 *        (if only one slot per bus slot_min = slot_max )
1091 */
1092struct bus_info *ibmphp_find_same_bus_num (u32 num)
1093{
1094        struct bus_info *ptr;
1095
1096        list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1097                if (ptr->busno == num) 
1098                         return ptr;
1099        }
1100        return NULL;
1101}
1102
1103/*  Finding relative bus number, in order to map corresponding
1104 *  bus register
1105 */
1106int ibmphp_get_bus_index (u8 num)
1107{
1108        struct bus_info *ptr;
1109
1110        list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1111                if (ptr->busno == num)  
1112                        return ptr->index;
1113        }
1114        return -ENODEV;
1115}
1116
1117void ibmphp_free_bus_info_queue (void)
1118{
1119        struct bus_info *bus_info;
1120        struct list_head *list;
1121        struct list_head *next;
1122
1123        list_for_each_safe (list, next, &bus_info_head ) {
1124                bus_info = list_entry (list, struct bus_info, bus_info_list);
1125                kfree (bus_info);
1126        }
1127}
1128
1129void ibmphp_free_ebda_hpc_queue (void)
1130{
1131        struct controller *controller = NULL;
1132        struct list_head *list;
1133        struct list_head *next;
1134        int pci_flag = 0;
1135
1136        list_for_each_safe (list, next, &ebda_hpc_head) {
1137                controller = list_entry (list, struct controller, ebda_hpc_list);
1138                if (controller->ctlr_type == 0)
1139                        release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1140                else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1141                        ++pci_flag;
1142                        pci_unregister_driver (&ibmphp_driver);
1143                }
1144                free_ebda_hpc (controller);
1145        }
1146}
1147
1148void ibmphp_free_ebda_pci_rsrc_queue (void)
1149{
1150        struct ebda_pci_rsrc *resource;
1151        struct list_head *list;
1152        struct list_head *next;
1153
1154        list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
1155                resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
1156                kfree (resource);
1157                resource = NULL;
1158        }
1159}
1160
1161static struct pci_device_id id_table[] = {
1162        {
1163                .vendor         = PCI_VENDOR_ID_IBM,
1164                .device         = HPC_DEVICE_ID,
1165                .subvendor      = PCI_VENDOR_ID_IBM,
1166                .subdevice      = HPC_SUBSYSTEM_ID,
1167                .class          = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1168        }, {}
1169};              
1170
1171MODULE_DEVICE_TABLE(pci, id_table);
1172
1173static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
1174static struct pci_driver ibmphp_driver = {
1175        .name           = "ibmphp",
1176        .id_table       = id_table,
1177        .probe          = ibmphp_probe,
1178};
1179
1180int ibmphp_register_pci (void)
1181{
1182        struct controller *ctrl;
1183        int rc = 0;
1184
1185        list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1186                if (ctrl->ctlr_type == 1) {
1187                        rc = pci_register_driver(&ibmphp_driver);
1188                        break;
1189                }
1190        }
1191        return rc;
1192}
1193static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
1194{
1195        struct controller *ctrl;
1196
1197        debug ("inside ibmphp_probe\n");
1198        
1199        list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1200                if (ctrl->ctlr_type == 1) {
1201                        if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1202                                ctrl->ctrl_dev = dev;
1203                                debug ("found device!!!\n");
1204                                debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1205                                return 0;
1206                        }
1207                }
1208        }
1209        return -ENODEV;
1210}
1211
1212