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