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 entries: %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 entries: %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                                rc = -ENOMEM;
 373                                goto out;
 374                        }
 375                        rio_table_ptr->ver_num = readb (io_mem + offset);
 376                        rio_table_ptr->scal_count = readb (io_mem + offset + 1);
 377                        rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
 378                        rio_table_ptr->offset = offset +3 ;
 379
 380                        debug("info about rio table hdr ---\n");
 381                        debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
 382                                rio_table_ptr->ver_num, rio_table_ptr->scal_count,
 383                                rio_table_ptr->riodev_count, rio_table_ptr->offset);
 384
 385                        rio_complete = 1;
 386                }
 387        }
 388
 389        if (!hs_complete && !rio_complete)
 390                goto error_nodev;
 391
 392        if (rio_table_ptr) {
 393                if (rio_complete && rio_table_ptr->ver_num == 3) {
 394                        rc = ebda_rio_table ();
 395                        if (rc)
 396                                goto out;
 397                }
 398        }
 399        rc = ebda_rsrc_controller ();
 400        if (rc)
 401                goto out;
 402
 403        rc = ebda_rsrc_rsrc ();
 404        goto out;
 405error_nodev:
 406        rc = -ENODEV;
 407out:
 408        iounmap (io_mem);
 409        return rc;
 410}
 411
 412/*
 413 * map info of scalability details and rio details from physical address
 414 */
 415static int __init ebda_rio_table (void)
 416{
 417        u16 offset;
 418        u8 i;
 419        struct rio_detail *rio_detail_ptr;
 420
 421        offset = rio_table_ptr->offset;
 422        offset += 12 * rio_table_ptr->scal_count;
 423
 424        // we do concern about rio details
 425        for (i = 0; i < rio_table_ptr->riodev_count; i++) {
 426                rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
 427                if (!rio_detail_ptr)
 428                        return -ENOMEM;
 429                rio_detail_ptr->rio_node_id = readb (io_mem + offset);
 430                rio_detail_ptr->bbar = readl (io_mem + offset + 1);
 431                rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
 432                rio_detail_ptr->owner_id = readb (io_mem + offset + 6);
 433                rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7);
 434                rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8);
 435                rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9);
 436                rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10);
 437                rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11);
 438                rio_detail_ptr->status = readb (io_mem + offset + 12);
 439                rio_detail_ptr->wpindex = readb (io_mem + offset + 13);
 440                rio_detail_ptr->chassis_num = readb (io_mem + offset + 14);
 441//              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);
 442                //create linked list of chassis
 443                if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
 444                        list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head);
 445                //create linked list of expansion box
 446                else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
 447                        list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head);
 448                else
 449                        // not in my concern
 450                        kfree (rio_detail_ptr);
 451                offset += 15;
 452        }
 453        print_lo_info ();
 454        print_vg_info ();
 455        return 0;
 456}
 457
 458/*
 459 * reorganizing linked list of chassis
 460 */
 461static struct opt_rio *search_opt_vg (u8 chassis_num)
 462{
 463        struct opt_rio *ptr;
 464        list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
 465                if (ptr->chassis_num == chassis_num)
 466                        return ptr;
 467        }
 468        return NULL;
 469}
 470
 471static int __init combine_wpg_for_chassis (void)
 472{
 473        struct opt_rio *opt_rio_ptr = NULL;
 474        struct rio_detail *rio_detail_ptr = NULL;
 475
 476        list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
 477                opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
 478                if (!opt_rio_ptr) {
 479                        opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
 480                        if (!opt_rio_ptr)
 481                                return -ENOMEM;
 482                        opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
 483                        opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
 484                        opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 485                        opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
 486                        list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head);
 487                } else {
 488                        opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 489                        opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
 490                }
 491        }
 492        print_opt_vg ();
 493        return 0;
 494}
 495
 496/*
 497 * reorganizing linked list of expansion box
 498 */
 499static struct opt_rio_lo *search_opt_lo (u8 chassis_num)
 500{
 501        struct opt_rio_lo *ptr;
 502        list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
 503                if (ptr->chassis_num == chassis_num)
 504                        return ptr;
 505        }
 506        return NULL;
 507}
 508
 509static int combine_wpg_for_expansion (void)
 510{
 511        struct opt_rio_lo *opt_rio_lo_ptr = NULL;
 512        struct rio_detail *rio_detail_ptr = NULL;
 513
 514        list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
 515                opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
 516                if (!opt_rio_lo_ptr) {
 517                        opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
 518                        if (!opt_rio_lo_ptr)
 519                                return -ENOMEM;
 520                        opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
 521                        opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
 522                        opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 523                        opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
 524                        opt_rio_lo_ptr->pack_count = 1;
 525
 526                        list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
 527                } else {
 528                        opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 529                        opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
 530                        opt_rio_lo_ptr->pack_count = 2;
 531                }
 532        }
 533        return 0;
 534}
 535
 536
 537/* Since we don't know the max slot number per each chassis, hence go
 538 * through the list of all chassis to find out the range
 539 * Arguments: slot_num, 1st slot number of the chassis we think we are on,
 540 * var (0 = chassis, 1 = expansion box)
 541 */
 542static int first_slot_num (u8 slot_num, u8 first_slot, u8 var)
 543{
 544        struct opt_rio *opt_vg_ptr = NULL;
 545        struct opt_rio_lo *opt_lo_ptr = NULL;
 546        int rc = 0;
 547
 548        if (!var) {
 549                list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 550                        if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
 551                                rc = -ENODEV;
 552                                break;
 553                        }
 554                }
 555        } else {
 556                list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 557                        if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
 558                                rc = -ENODEV;
 559                                break;
 560                        }
 561                }
 562        }
 563        return rc;
 564}
 565
 566static struct opt_rio_lo * find_rxe_num (u8 slot_num)
 567{
 568        struct opt_rio_lo *opt_lo_ptr;
 569
 570        list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 571                //check to see if this slot_num belongs to expansion box
 572                if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1)))
 573                        return opt_lo_ptr;
 574        }
 575        return NULL;
 576}
 577
 578static struct opt_rio * find_chassis_num (u8 slot_num)
 579{
 580        struct opt_rio *opt_vg_ptr;
 581
 582        list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 583                //check to see if this slot_num belongs to chassis
 584                if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0)))
 585                        return opt_vg_ptr;
 586        }
 587        return NULL;
 588}
 589
 590/* This routine will find out how many slots are in the chassis, so that
 591 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
 592 */
 593static u8 calculate_first_slot (u8 slot_num)
 594{
 595        u8 first_slot = 1;
 596        struct slot * slot_cur;
 597
 598        list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 599                if (slot_cur->ctrl) {
 600                        if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
 601                                first_slot = slot_cur->ctrl->ending_slot_num;
 602                }
 603        }
 604        return first_slot + 1;
 605
 606}
 607
 608#define SLOT_NAME_SIZE 30
 609
 610static char *create_file_name (struct slot * slot_cur)
 611{
 612        struct opt_rio *opt_vg_ptr = NULL;
 613        struct opt_rio_lo *opt_lo_ptr = NULL;
 614        static char str[SLOT_NAME_SIZE];
 615        int which = 0; /* rxe = 1, chassis = 0 */
 616        u8 number = 1; /* either chassis or rxe # */
 617        u8 first_slot = 1;
 618        u8 slot_num;
 619        u8 flag = 0;
 620
 621        if (!slot_cur) {
 622                err ("Structure passed is empty\n");
 623                return NULL;
 624        }
 625
 626        slot_num = slot_cur->number;
 627
 628        memset (str, 0, sizeof(str));
 629
 630        if (rio_table_ptr) {
 631                if (rio_table_ptr->ver_num == 3) {
 632                        opt_vg_ptr = find_chassis_num (slot_num);
 633                        opt_lo_ptr = find_rxe_num (slot_num);
 634                }
 635        }
 636        if (opt_vg_ptr) {
 637                if (opt_lo_ptr) {
 638                        if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
 639                                number = opt_lo_ptr->chassis_num;
 640                                first_slot = opt_lo_ptr->first_slot_num;
 641                                which = 1; /* it is RXE */
 642                        } else {
 643                                first_slot = opt_vg_ptr->first_slot_num;
 644                                number = opt_vg_ptr->chassis_num;
 645                                which = 0;
 646                        }
 647                } else {
 648                        first_slot = opt_vg_ptr->first_slot_num;
 649                        number = opt_vg_ptr->chassis_num;
 650                        which = 0;
 651                }
 652                ++flag;
 653        } else if (opt_lo_ptr) {
 654                number = opt_lo_ptr->chassis_num;
 655                first_slot = opt_lo_ptr->first_slot_num;
 656                which = 1;
 657                ++flag;
 658        } else if (rio_table_ptr) {
 659                if (rio_table_ptr->ver_num == 3) {
 660                        /* if both NULL and we DO have correct RIO table in BIOS */
 661                        return NULL;
 662                }
 663        }
 664        if (!flag) {
 665                if (slot_cur->ctrl->ctlr_type == 4) {
 666                        first_slot = calculate_first_slot (slot_num);
 667                        which = 1;
 668                } else {
 669                        which = 0;
 670                }
 671        }
 672
 673        sprintf(str, "%s%dslot%d",
 674                which == 0 ? "chassis" : "rxe",
 675                number, slot_num - first_slot + 1);
 676        return str;
 677}
 678
 679static int fillslotinfo(struct hotplug_slot *hotplug_slot)
 680{
 681        struct slot *slot;
 682        int rc = 0;
 683
 684        if (!hotplug_slot || !hotplug_slot->private)
 685                return -EINVAL;
 686
 687        slot = hotplug_slot->private;
 688        rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
 689        if (rc)
 690                return rc;
 691
 692        // power - enabled:1  not:0
 693        hotplug_slot->info->power_status = SLOT_POWER(slot->status);
 694
 695        // attention - off:0, on:1, blinking:2
 696        hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
 697
 698        // latch - open:1 closed:0
 699        hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
 700
 701        // pci board - present:1 not:0
 702        if (SLOT_PRESENT (slot->status))
 703                hotplug_slot->info->adapter_status = 1;
 704        else
 705                hotplug_slot->info->adapter_status = 0;
 706/*
 707        if (slot->bus_on->supported_bus_mode
 708                && (slot->bus_on->supported_speed == BUS_SPEED_66))
 709                hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
 710        else
 711                hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
 712*/
 713
 714        return rc;
 715}
 716
 717static void release_slot(struct hotplug_slot *hotplug_slot)
 718{
 719        struct slot *slot;
 720
 721        if (!hotplug_slot || !hotplug_slot->private)
 722                return;
 723
 724        slot = hotplug_slot->private;
 725        kfree(slot->hotplug_slot->info);
 726        kfree(slot->hotplug_slot);
 727        slot->ctrl = NULL;
 728        slot->bus_on = NULL;
 729
 730        /* we don't want to actually remove the resources, since free_resources will do just that */
 731        ibmphp_unconfigure_card(&slot, -1);
 732
 733        kfree (slot);
 734}
 735
 736static struct pci_driver ibmphp_driver;
 737
 738/*
 739 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
 740 * each hpc from physical address to a list of hot plug controllers based on
 741 * hpc descriptors.
 742 */
 743static int __init ebda_rsrc_controller (void)
 744{
 745        u16 addr, addr_slot, addr_bus;
 746        u8 ctlr_id, temp, bus_index;
 747        u16 ctlr, slot, bus;
 748        u16 slot_num, bus_num, index;
 749        struct hotplug_slot *hp_slot_ptr;
 750        struct controller *hpc_ptr;
 751        struct ebda_hpc_bus *bus_ptr;
 752        struct ebda_hpc_slot *slot_ptr;
 753        struct bus_info *bus_info_ptr1, *bus_info_ptr2;
 754        int rc;
 755        struct slot *tmp_slot;
 756        char name[SLOT_NAME_SIZE];
 757
 758        addr = hpc_list_ptr->phys_addr;
 759        for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
 760                bus_index = 1;
 761                ctlr_id = readb (io_mem + addr);
 762                addr += 1;
 763                slot_num = readb (io_mem + addr);
 764
 765                addr += 1;
 766                addr_slot = addr;       /* offset of slot structure */
 767                addr += (slot_num * 4);
 768
 769                bus_num = readb (io_mem + addr);
 770
 771                addr += 1;
 772                addr_bus = addr;        /* offset of bus */
 773                addr += (bus_num * 9);  /* offset of ctlr_type */
 774                temp = readb (io_mem + addr);
 775
 776                addr += 1;
 777                /* init hpc structure */
 778                hpc_ptr = alloc_ebda_hpc (slot_num, bus_num);
 779                if (!hpc_ptr ) {
 780                        rc = -ENOMEM;
 781                        goto error_no_hpc;
 782                }
 783                hpc_ptr->ctlr_id = ctlr_id;
 784                hpc_ptr->ctlr_relative_id = ctlr;
 785                hpc_ptr->slot_count = slot_num;
 786                hpc_ptr->bus_count = bus_num;
 787                debug ("now enter ctlr data structure ---\n");
 788                debug ("ctlr id: %x\n", ctlr_id);
 789                debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
 790                debug ("count of slots controlled by this ctlr: %x\n", slot_num);
 791                debug ("count of buses controlled by this ctlr: %x\n", bus_num);
 792
 793                /* init slot structure, fetch slot, bus, cap... */
 794                slot_ptr = hpc_ptr->slots;
 795                for (slot = 0; slot < slot_num; slot++) {
 796                        slot_ptr->slot_num = readb (io_mem + addr_slot);
 797                        slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num);
 798                        slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num);
 799                        slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num);
 800
 801                        // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
 802
 803                        bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
 804                        if (!bus_info_ptr2) {
 805                                bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
 806                                if (!bus_info_ptr1) {
 807                                        rc = -ENOMEM;
 808                                        goto error_no_hp_slot;
 809                                }
 810                                bus_info_ptr1->slot_min = slot_ptr->slot_num;
 811                                bus_info_ptr1->slot_max = slot_ptr->slot_num;
 812                                bus_info_ptr1->slot_count += 1;
 813                                bus_info_ptr1->busno = slot_ptr->slot_bus_num;
 814                                bus_info_ptr1->index = bus_index++;
 815                                bus_info_ptr1->current_speed = 0xff;
 816                                bus_info_ptr1->current_bus_mode = 0xff;
 817
 818                                bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
 819
 820                                list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head);
 821
 822                        } else {
 823                                bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num);
 824                                bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num);
 825                                bus_info_ptr2->slot_count += 1;
 826
 827                        }
 828
 829                        // end of creating the bus_info linked list
 830
 831                        slot_ptr++;
 832                        addr_slot += 1;
 833                }
 834
 835                /* init bus structure */
 836                bus_ptr = hpc_ptr->buses;
 837                for (bus = 0; bus < bus_num; bus++) {
 838                        bus_ptr->bus_num = readb (io_mem + addr_bus + bus);
 839                        bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus);
 840                        bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1);
 841
 842                        bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2);
 843
 844                        bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3);
 845
 846                        bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4);
 847
 848                        bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num);
 849                        if (bus_info_ptr2) {
 850                                bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
 851                                bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
 852                                bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
 853                                bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
 854                                bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
 855                        }
 856                        bus_ptr++;
 857                }
 858
 859                hpc_ptr->ctlr_type = temp;
 860
 861                switch (hpc_ptr->ctlr_type) {
 862                        case 1:
 863                                hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr);
 864                                hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
 865                                hpc_ptr->irq = readb (io_mem + addr + 2);
 866                                addr += 3;
 867                                debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
 868                                        hpc_ptr->u.pci_ctlr.bus,
 869                                        hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
 870                                break;
 871
 872                        case 0:
 873                                hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr);
 874                                hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2);
 875                                if (!request_region (hpc_ptr->u.isa_ctlr.io_start,
 876                                                     (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
 877                                                     "ibmphp")) {
 878                                        rc = -ENODEV;
 879                                        goto error_no_hp_slot;
 880                                }
 881                                hpc_ptr->irq = readb (io_mem + addr + 4);
 882                                addr += 5;
 883                                break;
 884
 885                        case 2:
 886                        case 4:
 887                                hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr);
 888                                hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4);
 889                                hpc_ptr->irq = readb (io_mem + addr + 5);
 890                                addr += 6;
 891                                break;
 892                        default:
 893                                rc = -ENODEV;
 894                                goto error_no_hp_slot;
 895                }
 896
 897                //reorganize chassis' linked list
 898                combine_wpg_for_chassis ();
 899                combine_wpg_for_expansion ();
 900                hpc_ptr->revision = 0xff;
 901                hpc_ptr->options = 0xff;
 902                hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
 903                hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
 904
 905                // register slots with hpc core as well as create linked list of ibm slot
 906                for (index = 0; index < hpc_ptr->slot_count; index++) {
 907
 908                        hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
 909                        if (!hp_slot_ptr) {
 910                                rc = -ENOMEM;
 911                                goto error_no_hp_slot;
 912                        }
 913
 914                        hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 915                        if (!hp_slot_ptr->info) {
 916                                rc = -ENOMEM;
 917                                goto error_no_hp_info;
 918                        }
 919
 920                        tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
 921                        if (!tmp_slot) {
 922                                rc = -ENOMEM;
 923                                goto error_no_slot;
 924                        }
 925
 926                        tmp_slot->flag = 1;
 927
 928                        tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
 929                        if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
 930                                tmp_slot->supported_speed =  3;
 931                        else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
 932                                tmp_slot->supported_speed =  2;
 933                        else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
 934                                tmp_slot->supported_speed =  1;
 935
 936                        if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
 937                                tmp_slot->supported_bus_mode = 1;
 938                        else
 939                                tmp_slot->supported_bus_mode = 0;
 940
 941
 942                        tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
 943
 944                        bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num);
 945                        if (!bus_info_ptr1) {
 946                                kfree(tmp_slot);
 947                                rc = -ENODEV;
 948                                goto error;
 949                        }
 950                        tmp_slot->bus_on = bus_info_ptr1;
 951                        bus_info_ptr1 = NULL;
 952                        tmp_slot->ctrl = hpc_ptr;
 953
 954                        tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
 955                        tmp_slot->number = hpc_ptr->slots[index].slot_num;
 956                        tmp_slot->hotplug_slot = hp_slot_ptr;
 957
 958                        hp_slot_ptr->private = tmp_slot;
 959                        hp_slot_ptr->release = release_slot;
 960
 961                        rc = fillslotinfo(hp_slot_ptr);
 962                        if (rc)
 963                                goto error;
 964
 965                        rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private);
 966                        if (rc)
 967                                goto error;
 968                        hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
 969
 970                        // end of registering ibm slot with hotplug core
 971
 972                        list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
 973                }
 974
 975                print_bus_info ();
 976                list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head );
 977
 978        }                       /* each hpc  */
 979
 980        list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
 981                snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
 982                pci_hp_register(tmp_slot->hotplug_slot,
 983                        pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
 984        }
 985
 986        print_ebda_hpc ();
 987        print_ibm_slot ();
 988        return 0;
 989
 990error:
 991        kfree (hp_slot_ptr->private);
 992error_no_slot:
 993        kfree (hp_slot_ptr->info);
 994error_no_hp_info:
 995        kfree (hp_slot_ptr);
 996error_no_hp_slot:
 997        free_ebda_hpc (hpc_ptr);
 998error_no_hpc:
 999        iounmap (io_mem);
1000        return rc;
1001}
1002
1003/*
1004 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
1005 * pfm from the physical addr to a list of resource.
1006 */
1007static int __init ebda_rsrc_rsrc (void)
1008{
1009        u16 addr;
1010        short rsrc;
1011        u8 type, rsrc_type;
1012        struct ebda_pci_rsrc *rsrc_ptr;
1013
1014        addr = rsrc_list_ptr->phys_addr;
1015        debug ("now entering rsrc land\n");
1016        debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1017
1018        for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1019                type = readb (io_mem + addr);
1020
1021                addr += 1;
1022                rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1023
1024                if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1025                        rsrc_ptr = alloc_ebda_pci_rsrc ();
1026                        if (!rsrc_ptr) {
1027                                iounmap (io_mem);
1028                                return -ENOMEM;
1029                        }
1030                        rsrc_ptr->rsrc_type = type;
1031
1032                        rsrc_ptr->bus_num = readb (io_mem + addr);
1033                        rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1034                        rsrc_ptr->start_addr = readw (io_mem + addr + 2);
1035                        rsrc_ptr->end_addr = readw (io_mem + addr + 4);
1036                        addr += 6;
1037
1038                        debug ("rsrc from io type ----\n");
1039                        debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1040                                rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1041
1042                        list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1043                }
1044
1045                if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1046                        rsrc_ptr = alloc_ebda_pci_rsrc ();
1047                        if (!rsrc_ptr ) {
1048                                iounmap (io_mem);
1049                                return -ENOMEM;
1050                        }
1051                        rsrc_ptr->rsrc_type = type;
1052
1053                        rsrc_ptr->bus_num = readb (io_mem + addr);
1054                        rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1055                        rsrc_ptr->start_addr = readl (io_mem + addr + 2);
1056                        rsrc_ptr->end_addr = readl (io_mem + addr + 6);
1057                        addr += 10;
1058
1059                        debug ("rsrc from mem or pfm ---\n");
1060                        debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1061                                rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1062
1063                        list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1064                }
1065        }
1066        kfree (rsrc_list_ptr);
1067        rsrc_list_ptr = NULL;
1068        print_ebda_pci_rsrc ();
1069        return 0;
1070}
1071
1072u16 ibmphp_get_total_controllers (void)
1073{
1074        return hpc_list_ptr->num_ctlrs;
1075}
1076
1077struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num)
1078{
1079        struct slot *slot;
1080
1081        list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1082                if (slot->number == physical_num)
1083                        return slot;
1084        }
1085        return NULL;
1086}
1087
1088/* To find:
1089 *      - the smallest slot number
1090 *      - the largest slot number
1091 *      - the total number of the slots based on each bus
1092 *        (if only one slot per bus slot_min = slot_max )
1093 */
1094struct bus_info *ibmphp_find_same_bus_num (u32 num)
1095{
1096        struct bus_info *ptr;
1097
1098        list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1099                if (ptr->busno == num)
1100                         return ptr;
1101        }
1102        return NULL;
1103}
1104
1105/*  Finding relative bus number, in order to map corresponding
1106 *  bus register
1107 */
1108int ibmphp_get_bus_index (u8 num)
1109{
1110        struct bus_info *ptr;
1111
1112        list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1113                if (ptr->busno == num)
1114                        return ptr->index;
1115        }
1116        return -ENODEV;
1117}
1118
1119void ibmphp_free_bus_info_queue (void)
1120{
1121        struct bus_info *bus_info;
1122        struct list_head *list;
1123        struct list_head *next;
1124
1125        list_for_each_safe (list, next, &bus_info_head ) {
1126                bus_info = list_entry (list, struct bus_info, bus_info_list);
1127                kfree (bus_info);
1128        }
1129}
1130
1131void ibmphp_free_ebda_hpc_queue (void)
1132{
1133        struct controller *controller = NULL;
1134        struct list_head *list;
1135        struct list_head *next;
1136        int pci_flag = 0;
1137
1138        list_for_each_safe (list, next, &ebda_hpc_head) {
1139                controller = list_entry (list, struct controller, ebda_hpc_list);
1140                if (controller->ctlr_type == 0)
1141                        release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1142                else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1143                        ++pci_flag;
1144                        pci_unregister_driver (&ibmphp_driver);
1145                }
1146                free_ebda_hpc (controller);
1147        }
1148}
1149
1150void ibmphp_free_ebda_pci_rsrc_queue (void)
1151{
1152        struct ebda_pci_rsrc *resource;
1153        struct list_head *list;
1154        struct list_head *next;
1155
1156        list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
1157                resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
1158                kfree (resource);
1159                resource = NULL;
1160        }
1161}
1162
1163static struct pci_device_id id_table[] = {
1164        {
1165                .vendor         = PCI_VENDOR_ID_IBM,
1166                .device         = HPC_DEVICE_ID,
1167                .subvendor      = PCI_VENDOR_ID_IBM,
1168                .subdevice      = HPC_SUBSYSTEM_ID,
1169                .class          = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1170        }, {}
1171};
1172
1173MODULE_DEVICE_TABLE(pci, id_table);
1174
1175static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
1176static struct pci_driver ibmphp_driver = {
1177        .name           = "ibmphp",
1178        .id_table       = id_table,
1179        .probe          = ibmphp_probe,
1180};
1181
1182int ibmphp_register_pci (void)
1183{
1184        struct controller *ctrl;
1185        int rc = 0;
1186
1187        list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1188                if (ctrl->ctlr_type == 1) {
1189                        rc = pci_register_driver(&ibmphp_driver);
1190                        break;
1191                }
1192        }
1193        return rc;
1194}
1195static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
1196{
1197        struct controller *ctrl;
1198
1199        debug ("inside ibmphp_probe\n");
1200
1201        list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1202                if (ctrl->ctlr_type == 1) {
1203                        if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1204                                ctrl->ctrl_dev = dev;
1205                                debug ("found device!!!\n");
1206                                debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1207                                return 0;
1208                        }
1209                }
1210        }
1211        return -ENODEV;
1212}
1213
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