drivers/pci/hotplug/ibmphp

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This source file includes following definitions.
alloc_ebda_hpc_list
alloc_ebda_hpc
free_ebda_hpc
alloc_ebda_rsrc_list
alloc_ebda_pci_rsrc
print_bus_info
print_lo_info
print_vg_info
print_ebda_pci_rsrc
print_ibm_slot
print_opt_vg
print_ebda_hpc
ibmphp_access_ebda
ebda_rio_table
search_opt_vg
combine_wpg_for_chassis
search_opt_lo
combine_wpg_for_expansion
first_slot_num
find_rxe_num
find_chassis_num
calculate_first_slot
create_file_name
fillslotinfo
ebda_rsrc_controller
ebda_rsrc_rsrc
ibmphp_get_total_controllers
ibmphp_get_slot_from_physical_num
ibmphp_find_same_bus_num
ibmphp_get_bus_index
ibmphp_free_bus_info_queue
ibmphp_free_ebda_hpc_queue
ibmphp_free_ebda_pci_rsrc_queue
ibmphp_register_pci
ibmphp_probe
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * IBM Hot Plug Controller Driver
   4  *
   5  * Written By: Tong Yu, IBM Corporation
   6  *
   7  * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
   8  * Copyright (C) 2001-2003 IBM Corp.
   9  *
  10  * All rights reserved.
  11  *
  12  * Send feedback to <gregkh@us.ibm.com>
  13  *
  14  */
  15 
  16 #include <linux/module.h>
  17 #include <linux/errno.h>
  18 #include <linux/mm.h>
  19 #include <linux/slab.h>
  20 #include <linux/pci.h>
  21 #include <linux/list.h>
  22 #include <linux/init.h>
  23 #include "ibmphp.h"
  24 
  25 /*
  26  * POST builds data blocks(in this data block definition, a char-1
  27  * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
  28  * BIOS Data Area which describe the configuration of the hot-plug
  29  * controllers and resources used by the PCI Hot-Plug devices.
  30  *
  31  * This file walks EBDA, maps data block from physical addr,
  32  * reconstruct linked lists about all system resource(MEM, PFM, IO)
  33  * already assigned by POST, as well as linked lists about hot plug
  34  * controllers (ctlr#, slot#, bus&slot features...)
  35  */
  36 
  37 /* Global lists */
  38 LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
  39 LIST_HEAD(ibmphp_slot_head);
  40 
  41 /* Local variables */
  42 static struct ebda_hpc_list *hpc_list_ptr;
  43 static struct ebda_rsrc_list *rsrc_list_ptr;
  44 static struct rio_table_hdr *rio_table_ptr = NULL;
  45 static LIST_HEAD(ebda_hpc_head);
  46 static LIST_HEAD(bus_info_head);
  47 static LIST_HEAD(rio_vg_head);
  48 static LIST_HEAD(rio_lo_head);
  49 static LIST_HEAD(opt_vg_head);
  50 static LIST_HEAD(opt_lo_head);
  51 static void __iomem *io_mem;
  52 
  53 /* Local functions */
  54 static int ebda_rsrc_controller(void);
  55 static int ebda_rsrc_rsrc(void);
  56 static int ebda_rio_table(void);
  57 
  58 static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
  59 {
  60         return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
  61 }
  62 
  63 static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
  64 {
  65         struct controller *controller;
  66         struct ebda_hpc_slot *slots;
  67         struct ebda_hpc_bus *buses;
  68 
  69         controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
  70         if (!controller)
  71                 goto error;
  72 
  73         slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
  74         if (!slots)
  75                 goto error_contr;
  76         controller->slots = slots;
  77 
  78         buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
  79         if (!buses)
  80                 goto error_slots;
  81         controller->buses = buses;
  82 
  83         return controller;
  84 error_slots:
  85         kfree(controller->slots);
  86 error_contr:
  87         kfree(controller);
  88 error:
  89         return NULL;
  90 }
  91 
  92 static void free_ebda_hpc(struct controller *controller)
  93 {
  94         kfree(controller->slots);
  95         kfree(controller->buses);
  96         kfree(controller);
  97 }
  98 
  99 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
 100 {
 101         return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
 102 }
 103 
 104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
 105 {
 106         return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
 107 }
 108 
 109 static void __init print_bus_info(void)
 110 {
 111         struct bus_info *ptr;
 112 
 113         list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
 114                 debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
 115                 debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
 116                 debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
 117                 debug("%s - bus# = %x\n", __func__, ptr->busno);
 118                 debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
 119                 debug("%s - controller_id = %x\n", __func__, ptr->controller_id);
 120 
 121                 debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
 122                 debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
 123                 debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
 124                 debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
 125                 debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
 126 
 127         }
 128 }
 129 
 130 static void print_lo_info(void)
 131 {
 132         struct rio_detail *ptr;
 133         debug("print_lo_info ----\n");
 134         list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
 135                 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
 136                 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
 137                 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
 138                 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
 139                 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
 140                 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
 141 
 142         }
 143 }
 144 
 145 static void print_vg_info(void)
 146 {
 147         struct rio_detail *ptr;
 148         debug("%s ---\n", __func__);
 149         list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
 150                 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
 151                 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
 152                 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
 153                 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
 154                 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
 155                 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
 156 
 157         }
 158 }
 159 
 160 static void __init print_ebda_pci_rsrc(void)
 161 {
 162         struct ebda_pci_rsrc *ptr;
 163 
 164         list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
 165                 debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
 166                         __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
 167         }
 168 }
 169 
 170 static void __init print_ibm_slot(void)
 171 {
 172         struct slot *ptr;
 173 
 174         list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
 175                 debug("%s - slot_number: %x\n", __func__, ptr->number);
 176         }
 177 }
 178 
 179 static void __init print_opt_vg(void)
 180 {
 181         struct opt_rio *ptr;
 182         debug("%s ---\n", __func__);
 183         list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
 184                 debug("%s - rio_type %x\n", __func__, ptr->rio_type);
 185                 debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
 186                 debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
 187                 debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
 188         }
 189 }
 190 
 191 static void __init print_ebda_hpc(void)
 192 {
 193         struct controller *hpc_ptr;
 194         u16 index;
 195 
 196         list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
 197                 for (index = 0; index < hpc_ptr->slot_count; index++) {
 198                         debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
 199                         debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
 200                         debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
 201                         debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
 202                 }
 203 
 204                 for (index = 0; index < hpc_ptr->bus_count; index++)
 205                         debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
 206 
 207                 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
 208                 switch (hpc_ptr->ctlr_type) {
 209                 case 1:
 210                         debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
 211                         debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
 212                         debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
 213                         break;
 214 
 215                 case 0:
 216                         debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
 217                         debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
 218                         debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
 219                         break;
 220 
 221                 case 2:
 222                 case 4:
 223                         debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
 224                         debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
 225                         debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
 226                         break;
 227                 }
 228         }
 229 }
 230 
 231 int __init ibmphp_access_ebda(void)
 232 {
 233         u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
 234         u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
 235         int rc = 0;
 236 
 237 
 238         rio_complete = 0;
 239         hs_complete = 0;
 240 
 241         io_mem = ioremap((0x40 << 4) + 0x0e, 2);
 242         if (!io_mem)
 243                 return -ENOMEM;
 244         ebda_seg = readw(io_mem);
 245         iounmap(io_mem);
 246         debug("returned ebda segment: %x\n", ebda_seg);
 247 
 248         io_mem = ioremap(ebda_seg<<4, 1);
 249         if (!io_mem)
 250                 return -ENOMEM;
 251         ebda_sz = readb(io_mem);
 252         iounmap(io_mem);
 253         debug("ebda size: %d(KiB)\n", ebda_sz);
 254         if (ebda_sz == 0)
 255                 return -ENOMEM;
 256 
 257         io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
 258         if (!io_mem)
 259                 return -ENOMEM;
 260         next_offset = 0x180;
 261 
 262         for (;;) {
 263                 offset = next_offset;
 264 
 265                 /* Make sure what we read is still in the mapped section */
 266                 if (WARN(offset > (ebda_sz * 1024 - 4),
 267                          "ibmphp_ebda: next read is beyond ebda_sz\n"))
 268                         break;
 269 
 270                 next_offset = readw(io_mem + offset);   /* offset of next blk */
 271 
 272                 offset += 2;
 273                 if (next_offset == 0)   /* 0 indicate it's last blk */
 274                         break;
 275                 blk_id = readw(io_mem + offset);        /* this blk id */
 276 
 277                 offset += 2;
 278                 /* check if it is hot swap block or rio block */
 279                 if (blk_id != 0x4853 && blk_id != 0x4752)
 280                         continue;
 281                 /* found hs table */
 282                 if (blk_id == 0x4853) {
 283                         debug("now enter hot swap block---\n");
 284                         debug("hot blk id: %x\n", blk_id);
 285                         format = readb(io_mem + offset);
 286 
 287                         offset += 1;
 288                         if (format != 4)
 289                                 goto error_nodev;
 290                         debug("hot blk format: %x\n", format);
 291                         /* hot swap sub blk */
 292                         base = offset;
 293 
 294                         sub_addr = base;
 295                         re = readw(io_mem + sub_addr);  /* next sub blk */
 296 
 297                         sub_addr += 2;
 298                         rc_id = readw(io_mem + sub_addr);       /* sub blk id */
 299 
 300                         sub_addr += 2;
 301                         if (rc_id != 0x5243)
 302                                 goto error_nodev;
 303                         /* rc sub blk signature  */
 304                         num_ctlrs = readb(io_mem + sub_addr);
 305 
 306                         sub_addr += 1;
 307                         hpc_list_ptr = alloc_ebda_hpc_list();
 308                         if (!hpc_list_ptr) {
 309                                 rc = -ENOMEM;
 310                                 goto out;
 311                         }
 312                         hpc_list_ptr->format = format;
 313                         hpc_list_ptr->num_ctlrs = num_ctlrs;
 314                         hpc_list_ptr->phys_addr = sub_addr;     /*  offset of RSRC_CONTROLLER blk */
 315                         debug("info about hpc descriptor---\n");
 316                         debug("hot blk format: %x\n", format);
 317                         debug("num of controller: %x\n", num_ctlrs);
 318                         debug("offset of hpc data structure entries: %x\n ", sub_addr);
 319 
 320                         sub_addr = base + re;   /* re sub blk */
 321                         /* FIXME: rc is never used/checked */
 322                         rc = readw(io_mem + sub_addr);  /* next sub blk */
 323 
 324                         sub_addr += 2;
 325                         re_id = readw(io_mem + sub_addr);       /* sub blk id */
 326 
 327                         sub_addr += 2;
 328                         if (re_id != 0x5245)
 329                                 goto error_nodev;
 330 
 331                         /* signature of re */
 332                         num_entries = readw(io_mem + sub_addr);
 333 
 334                         sub_addr += 2;  /* offset of RSRC_ENTRIES blk */
 335                         rsrc_list_ptr = alloc_ebda_rsrc_list();
 336                         if (!rsrc_list_ptr) {
 337                                 rc = -ENOMEM;
 338                                 goto out;
 339                         }
 340                         rsrc_list_ptr->format = format;
 341                         rsrc_list_ptr->num_entries = num_entries;
 342                         rsrc_list_ptr->phys_addr = sub_addr;
 343 
 344                         debug("info about rsrc descriptor---\n");
 345                         debug("format: %x\n", format);
 346                         debug("num of rsrc: %x\n", num_entries);
 347                         debug("offset of rsrc data structure entries: %x\n ", sub_addr);
 348 
 349                         hs_complete = 1;
 350                 } else {
 351                 /* found rio table, blk_id == 0x4752 */
 352                         debug("now enter io table ---\n");
 353                         debug("rio blk id: %x\n", blk_id);
 354 
 355                         rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
 356                         if (!rio_table_ptr) {
 357                                 rc = -ENOMEM;
 358                                 goto out;
 359                         }
 360                         rio_table_ptr->ver_num = readb(io_mem + offset);
 361                         rio_table_ptr->scal_count = readb(io_mem + offset + 1);
 362                         rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
 363                         rio_table_ptr->offset = offset + 3 ;
 364 
 365                         debug("info about rio table hdr ---\n");
 366                         debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
 367                                 rio_table_ptr->ver_num, rio_table_ptr->scal_count,
 368                                 rio_table_ptr->riodev_count, rio_table_ptr->offset);
 369 
 370                         rio_complete = 1;
 371                 }
 372         }
 373 
 374         if (!hs_complete && !rio_complete)
 375                 goto error_nodev;
 376 
 377         if (rio_table_ptr) {
 378                 if (rio_complete && rio_table_ptr->ver_num == 3) {
 379                         rc = ebda_rio_table();
 380                         if (rc)
 381                                 goto out;
 382                 }
 383         }
 384         rc = ebda_rsrc_controller();
 385         if (rc)
 386                 goto out;
 387 
 388         rc = ebda_rsrc_rsrc();
 389         goto out;
 390 error_nodev:
 391         rc = -ENODEV;
 392 out:
 393         iounmap(io_mem);
 394         return rc;
 395 }
 396 
 397 /*
 398  * map info of scalability details and rio details from physical address
 399  */
 400 static int __init ebda_rio_table(void)
 401 {
 402         u16 offset;
 403         u8 i;
 404         struct rio_detail *rio_detail_ptr;
 405 
 406         offset = rio_table_ptr->offset;
 407         offset += 12 * rio_table_ptr->scal_count;
 408 
 409         // we do concern about rio details
 410         for (i = 0; i < rio_table_ptr->riodev_count; i++) {
 411                 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
 412                 if (!rio_detail_ptr)
 413                         return -ENOMEM;
 414                 rio_detail_ptr->rio_node_id = readb(io_mem + offset);
 415                 rio_detail_ptr->bbar = readl(io_mem + offset + 1);
 416                 rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
 417                 rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
 418                 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
 419                 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
 420                 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
 421                 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
 422                 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
 423                 rio_detail_ptr->status = readb(io_mem + offset + 12);
 424                 rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
 425                 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
 426 //              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);
 427                 //create linked list of chassis
 428                 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
 429                         list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
 430                 //create linked list of expansion box
 431                 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
 432                         list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
 433                 else
 434                         // not in my concern
 435                         kfree(rio_detail_ptr);
 436                 offset += 15;
 437         }
 438         print_lo_info();
 439         print_vg_info();
 440         return 0;
 441 }
 442 
 443 /*
 444  * reorganizing linked list of chassis
 445  */
 446 static struct opt_rio *search_opt_vg(u8 chassis_num)
 447 {
 448         struct opt_rio *ptr;
 449         list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
 450                 if (ptr->chassis_num == chassis_num)
 451                         return ptr;
 452         }
 453         return NULL;
 454 }
 455 
 456 static int __init combine_wpg_for_chassis(void)
 457 {
 458         struct opt_rio *opt_rio_ptr = NULL;
 459         struct rio_detail *rio_detail_ptr = NULL;
 460 
 461         list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
 462                 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
 463                 if (!opt_rio_ptr) {
 464                         opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
 465                         if (!opt_rio_ptr)
 466                                 return -ENOMEM;
 467                         opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
 468                         opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
 469                         opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 470                         opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
 471                         list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
 472                 } else {
 473                         opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 474                         opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
 475                 }
 476         }
 477         print_opt_vg();
 478         return 0;
 479 }
 480 
 481 /*
 482  * reorganizing linked list of expansion box
 483  */
 484 static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
 485 {
 486         struct opt_rio_lo *ptr;
 487         list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
 488                 if (ptr->chassis_num == chassis_num)
 489                         return ptr;
 490         }
 491         return NULL;
 492 }
 493 
 494 static int combine_wpg_for_expansion(void)
 495 {
 496         struct opt_rio_lo *opt_rio_lo_ptr = NULL;
 497         struct rio_detail *rio_detail_ptr = NULL;
 498 
 499         list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
 500                 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
 501                 if (!opt_rio_lo_ptr) {
 502                         opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
 503                         if (!opt_rio_lo_ptr)
 504                                 return -ENOMEM;
 505                         opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
 506                         opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
 507                         opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
 508                         opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
 509                         opt_rio_lo_ptr->pack_count = 1;
 510 
 511                         list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
 512                 } else {
 513                         opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
 514                         opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
 515                         opt_rio_lo_ptr->pack_count = 2;
 516                 }
 517         }
 518         return 0;
 519 }
 520 
 521 
 522 /* Since we don't know the max slot number per each chassis, hence go
 523  * through the list of all chassis to find out the range
 524  * Arguments: slot_num, 1st slot number of the chassis we think we are on,
 525  * var (0 = chassis, 1 = expansion box)
 526  */
 527 static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
 528 {
 529         struct opt_rio *opt_vg_ptr = NULL;
 530         struct opt_rio_lo *opt_lo_ptr = NULL;
 531         int rc = 0;
 532 
 533         if (!var) {
 534                 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 535                         if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
 536                                 rc = -ENODEV;
 537                                 break;
 538                         }
 539                 }
 540         } else {
 541                 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 542                         if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
 543                                 rc = -ENODEV;
 544                                 break;
 545                         }
 546                 }
 547         }
 548         return rc;
 549 }
 550 
 551 static struct opt_rio_lo *find_rxe_num(u8 slot_num)
 552 {
 553         struct opt_rio_lo *opt_lo_ptr;
 554 
 555         list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
 556                 //check to see if this slot_num belongs to expansion box
 557                 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
 558                         return opt_lo_ptr;
 559         }
 560         return NULL;
 561 }
 562 
 563 static struct opt_rio *find_chassis_num(u8 slot_num)
 564 {
 565         struct opt_rio *opt_vg_ptr;
 566 
 567         list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
 568                 //check to see if this slot_num belongs to chassis
 569                 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
 570                         return opt_vg_ptr;
 571         }
 572         return NULL;
 573 }
 574 
 575 /* This routine will find out how many slots are in the chassis, so that
 576  * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
 577  */
 578 static u8 calculate_first_slot(u8 slot_num)
 579 {
 580         u8 first_slot = 1;
 581         struct slot *slot_cur;
 582 
 583         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 584                 if (slot_cur->ctrl) {
 585                         if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
 586                                 first_slot = slot_cur->ctrl->ending_slot_num;
 587                 }
 588         }
 589         return first_slot + 1;
 590 
 591 }
 592 
 593 #define SLOT_NAME_SIZE 30
 594 
 595 static char *create_file_name(struct slot *slot_cur)
 596 {
 597         struct opt_rio *opt_vg_ptr = NULL;
 598         struct opt_rio_lo *opt_lo_ptr = NULL;
 599         static char str[SLOT_NAME_SIZE];
 600         int which = 0; /* rxe = 1, chassis = 0 */
 601         u8 number = 1; /* either chassis or rxe # */
 602         u8 first_slot = 1;
 603         u8 slot_num;
 604         u8 flag = 0;
 605 
 606         if (!slot_cur) {
 607                 err("Structure passed is empty\n");
 608                 return NULL;
 609         }
 610 
 611         slot_num = slot_cur->number;
 612 
 613         memset(str, 0, sizeof(str));
 614 
 615         if (rio_table_ptr) {
 616                 if (rio_table_ptr->ver_num == 3) {
 617                         opt_vg_ptr = find_chassis_num(slot_num);
 618                         opt_lo_ptr = find_rxe_num(slot_num);
 619                 }
 620         }
 621         if (opt_vg_ptr) {
 622                 if (opt_lo_ptr) {
 623                         if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
 624                                 number = opt_lo_ptr->chassis_num;
 625                                 first_slot = opt_lo_ptr->first_slot_num;
 626                                 which = 1; /* it is RXE */
 627                         } else {
 628                                 first_slot = opt_vg_ptr->first_slot_num;
 629                                 number = opt_vg_ptr->chassis_num;
 630                                 which = 0;
 631                         }
 632                 } else {
 633                         first_slot = opt_vg_ptr->first_slot_num;
 634                         number = opt_vg_ptr->chassis_num;
 635                         which = 0;
 636                 }
 637                 ++flag;
 638         } else if (opt_lo_ptr) {
 639                 number = opt_lo_ptr->chassis_num;
 640                 first_slot = opt_lo_ptr->first_slot_num;
 641                 which = 1;
 642                 ++flag;
 643         } else if (rio_table_ptr) {
 644                 if (rio_table_ptr->ver_num == 3) {
 645                         /* if both NULL and we DO have correct RIO table in BIOS */
 646                         return NULL;
 647                 }
 648         }
 649         if (!flag) {
 650                 if (slot_cur->ctrl->ctlr_type == 4) {
 651                         first_slot = calculate_first_slot(slot_num);
 652                         which = 1;
 653                 } else {
 654                         which = 0;
 655                 }
 656         }
 657 
 658         sprintf(str, "%s%dslot%d",
 659                 which == 0 ? "chassis" : "rxe",
 660                 number, slot_num - first_slot + 1);
 661         return str;
 662 }
 663 
 664 static int fillslotinfo(struct hotplug_slot *hotplug_slot)
 665 {
 666         struct slot *slot;
 667         int rc = 0;
 668 
 669         slot = to_slot(hotplug_slot);
 670         rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
 671         return rc;
 672 }
 673 
 674 static struct pci_driver ibmphp_driver;
 675 
 676 /*
 677  * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
 678  * each hpc from physical address to a list of hot plug controllers based on
 679  * hpc descriptors.
 680  */
 681 static int __init ebda_rsrc_controller(void)
 682 {
 683         u16 addr, addr_slot, addr_bus;
 684         u8 ctlr_id, temp, bus_index;
 685         u16 ctlr, slot, bus;
 686         u16 slot_num, bus_num, index;
 687         struct controller *hpc_ptr;
 688         struct ebda_hpc_bus *bus_ptr;
 689         struct ebda_hpc_slot *slot_ptr;
 690         struct bus_info *bus_info_ptr1, *bus_info_ptr2;
 691         int rc;
 692         struct slot *tmp_slot;
 693         char name[SLOT_NAME_SIZE];
 694 
 695         addr = hpc_list_ptr->phys_addr;
 696         for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
 697                 bus_index = 1;
 698                 ctlr_id = readb(io_mem + addr);
 699                 addr += 1;
 700                 slot_num = readb(io_mem + addr);
 701 
 702                 addr += 1;
 703                 addr_slot = addr;       /* offset of slot structure */
 704                 addr += (slot_num * 4);
 705 
 706                 bus_num = readb(io_mem + addr);
 707 
 708                 addr += 1;
 709                 addr_bus = addr;        /* offset of bus */
 710                 addr += (bus_num * 9);  /* offset of ctlr_type */
 711                 temp = readb(io_mem + addr);
 712 
 713                 addr += 1;
 714                 /* init hpc structure */
 715                 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
 716                 if (!hpc_ptr) {
 717                         rc = -ENOMEM;
 718                         goto error_no_hpc;
 719                 }
 720                 hpc_ptr->ctlr_id = ctlr_id;
 721                 hpc_ptr->ctlr_relative_id = ctlr;
 722                 hpc_ptr->slot_count = slot_num;
 723                 hpc_ptr->bus_count = bus_num;
 724                 debug("now enter ctlr data structure ---\n");
 725                 debug("ctlr id: %x\n", ctlr_id);
 726                 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
 727                 debug("count of slots controlled by this ctlr: %x\n", slot_num);
 728                 debug("count of buses controlled by this ctlr: %x\n", bus_num);
 729 
 730                 /* init slot structure, fetch slot, bus, cap... */
 731                 slot_ptr = hpc_ptr->slots;
 732                 for (slot = 0; slot < slot_num; slot++) {
 733                         slot_ptr->slot_num = readb(io_mem + addr_slot);
 734                         slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
 735                         slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
 736                         slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
 737 
 738                         // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
 739 
 740                         bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
 741                         if (!bus_info_ptr2) {
 742                                 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
 743                                 if (!bus_info_ptr1) {
 744                                         rc = -ENOMEM;
 745                                         goto error_no_slot;
 746                                 }
 747                                 bus_info_ptr1->slot_min = slot_ptr->slot_num;
 748                                 bus_info_ptr1->slot_max = slot_ptr->slot_num;
 749                                 bus_info_ptr1->slot_count += 1;
 750                                 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
 751                                 bus_info_ptr1->index = bus_index++;
 752                                 bus_info_ptr1->current_speed = 0xff;
 753                                 bus_info_ptr1->current_bus_mode = 0xff;
 754 
 755                                 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
 756 
 757                                 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
 758 
 759                         } else {
 760                                 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
 761                                 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
 762                                 bus_info_ptr2->slot_count += 1;
 763 
 764                         }
 765 
 766                         // end of creating the bus_info linked list
 767 
 768                         slot_ptr++;
 769                         addr_slot += 1;
 770                 }
 771 
 772                 /* init bus structure */
 773                 bus_ptr = hpc_ptr->buses;
 774                 for (bus = 0; bus < bus_num; bus++) {
 775                         bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
 776                         bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
 777                         bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
 778 
 779                         bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
 780 
 781                         bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
 782 
 783                         bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
 784 
 785                         bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
 786                         if (bus_info_ptr2) {
 787                                 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
 788                                 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
 789                                 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
 790                                 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
 791                                 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
 792                         }
 793                         bus_ptr++;
 794                 }
 795 
 796                 hpc_ptr->ctlr_type = temp;
 797 
 798                 switch (hpc_ptr->ctlr_type) {
 799                         case 1:
 800                                 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
 801                                 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
 802                                 hpc_ptr->irq = readb(io_mem + addr + 2);
 803                                 addr += 3;
 804                                 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
 805                                         hpc_ptr->u.pci_ctlr.bus,
 806                                         hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
 807                                 break;
 808 
 809                         case 0:
 810                                 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
 811                                 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
 812                                 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
 813                                                      (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
 814                                                      "ibmphp")) {
 815                                         rc = -ENODEV;
 816                                         goto error_no_slot;
 817                                 }
 818                                 hpc_ptr->irq = readb(io_mem + addr + 4);
 819                                 addr += 5;
 820                                 break;
 821 
 822                         case 2:
 823                         case 4:
 824                                 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
 825                                 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
 826                                 hpc_ptr->irq = readb(io_mem + addr + 5);
 827                                 addr += 6;
 828                                 break;
 829                         default:
 830                                 rc = -ENODEV;
 831                                 goto error_no_slot;
 832                 }
 833 
 834                 //reorganize chassis' linked list
 835                 combine_wpg_for_chassis();
 836                 combine_wpg_for_expansion();
 837                 hpc_ptr->revision = 0xff;
 838                 hpc_ptr->options = 0xff;
 839                 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
 840                 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
 841 
 842                 // register slots with hpc core as well as create linked list of ibm slot
 843                 for (index = 0; index < hpc_ptr->slot_count; index++) {
 844                         tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
 845                         if (!tmp_slot) {
 846                                 rc = -ENOMEM;
 847                                 goto error_no_slot;
 848                         }
 849 
 850                         tmp_slot->flag = 1;
 851 
 852                         tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
 853                         if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
 854                                 tmp_slot->supported_speed =  3;
 855                         else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
 856                                 tmp_slot->supported_speed =  2;
 857                         else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
 858                                 tmp_slot->supported_speed =  1;
 859 
 860                         if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
 861                                 tmp_slot->supported_bus_mode = 1;
 862                         else
 863                                 tmp_slot->supported_bus_mode = 0;
 864 
 865 
 866                         tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
 867 
 868                         bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
 869                         if (!bus_info_ptr1) {
 870                                 rc = -ENODEV;
 871                                 goto error;
 872                         }
 873                         tmp_slot->bus_on = bus_info_ptr1;
 874                         bus_info_ptr1 = NULL;
 875                         tmp_slot->ctrl = hpc_ptr;
 876 
 877                         tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
 878                         tmp_slot->number = hpc_ptr->slots[index].slot_num;
 879 
 880                         rc = fillslotinfo(&tmp_slot->hotplug_slot);
 881                         if (rc)
 882                                 goto error;
 883 
 884                         rc = ibmphp_init_devno(&tmp_slot);
 885                         if (rc)
 886                                 goto error;
 887                         tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops;
 888 
 889                         // end of registering ibm slot with hotplug core
 890 
 891                         list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head);
 892                 }
 893 
 894                 print_bus_info();
 895                 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
 896 
 897         }                       /* each hpc  */
 898 
 899         list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
 900                 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
 901                 pci_hp_register(&tmp_slot->hotplug_slot,
 902                         pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
 903         }
 904 
 905         print_ebda_hpc();
 906         print_ibm_slot();
 907         return 0;
 908 
 909 error:
 910         kfree(tmp_slot);
 911 error_no_slot:
 912         free_ebda_hpc(hpc_ptr);
 913 error_no_hpc:
 914         iounmap(io_mem);
 915         return rc;
 916 }
 917 
 918 /*
 919  * map info (bus, devfun, start addr, end addr..) of i/o, memory,
 920  * pfm from the physical addr to a list of resource.
 921  */
 922 static int __init ebda_rsrc_rsrc(void)
 923 {
 924         u16 addr;
 925         short rsrc;
 926         u8 type, rsrc_type;
 927         struct ebda_pci_rsrc *rsrc_ptr;
 928 
 929         addr = rsrc_list_ptr->phys_addr;
 930         debug("now entering rsrc land\n");
 931         debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
 932 
 933         for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
 934                 type = readb(io_mem + addr);
 935 
 936                 addr += 1;
 937                 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
 938 
 939                 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
 940                         rsrc_ptr = alloc_ebda_pci_rsrc();
 941                         if (!rsrc_ptr) {
 942                                 iounmap(io_mem);
 943                                 return -ENOMEM;
 944                         }
 945                         rsrc_ptr->rsrc_type = type;
 946 
 947                         rsrc_ptr->bus_num = readb(io_mem + addr);
 948                         rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
 949                         rsrc_ptr->start_addr = readw(io_mem + addr + 2);
 950                         rsrc_ptr->end_addr = readw(io_mem + addr + 4);
 951                         addr += 6;
 952 
 953                         debug("rsrc from io type ----\n");
 954                         debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
 955                                 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
 956 
 957                         list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
 958                 }
 959 
 960                 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
 961                         rsrc_ptr = alloc_ebda_pci_rsrc();
 962                         if (!rsrc_ptr) {
 963                                 iounmap(io_mem);
 964                                 return -ENOMEM;
 965                         }
 966                         rsrc_ptr->rsrc_type = type;
 967 
 968                         rsrc_ptr->bus_num = readb(io_mem + addr);
 969                         rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
 970                         rsrc_ptr->start_addr = readl(io_mem + addr + 2);
 971                         rsrc_ptr->end_addr = readl(io_mem + addr + 6);
 972                         addr += 10;
 973 
 974                         debug("rsrc from mem or pfm ---\n");
 975                         debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
 976                                 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
 977 
 978                         list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
 979                 }
 980         }
 981         kfree(rsrc_list_ptr);
 982         rsrc_list_ptr = NULL;
 983         print_ebda_pci_rsrc();
 984         return 0;
 985 }
 986 
 987 u16 ibmphp_get_total_controllers(void)
 988 {
 989         return hpc_list_ptr->num_ctlrs;
 990 }
 991 
 992 struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
 993 {
 994         struct slot *slot;
 995 
 996         list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
 997                 if (slot->number == physical_num)
 998                         return slot;
 999         }
1000         return NULL;
1001 }
1002 
1003 /* To find:
1004  *      - the smallest slot number
1005  *      - the largest slot number
1006  *      - the total number of the slots based on each bus
1007  *        (if only one slot per bus slot_min = slot_max )
1008  */
1009 struct bus_info *ibmphp_find_same_bus_num(u32 num)
1010 {
1011         struct bus_info *ptr;
1012 
1013         list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1014                 if (ptr->busno == num)
1015                          return ptr;
1016         }
1017         return NULL;
1018 }
1019 
1020 /*  Finding relative bus number, in order to map corresponding
1021  *  bus register
1022  */
1023 int ibmphp_get_bus_index(u8 num)
1024 {
1025         struct bus_info *ptr;
1026 
1027         list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1028                 if (ptr->busno == num)
1029                         return ptr->index;
1030         }
1031         return -ENODEV;
1032 }
1033 
1034 void ibmphp_free_bus_info_queue(void)
1035 {
1036         struct bus_info *bus_info, *next;
1037 
1038         list_for_each_entry_safe(bus_info, next, &bus_info_head,
1039                                  bus_info_list) {
1040                 kfree (bus_info);
1041         }
1042 }
1043 
1044 void ibmphp_free_ebda_hpc_queue(void)
1045 {
1046         struct controller *controller = NULL, *next;
1047         int pci_flag = 0;
1048 
1049         list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1050                                  ebda_hpc_list) {
1051                 if (controller->ctlr_type == 0)
1052                         release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1053                 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1054                         ++pci_flag;
1055                         pci_unregister_driver(&ibmphp_driver);
1056                 }
1057                 free_ebda_hpc(controller);
1058         }
1059 }
1060 
1061 void ibmphp_free_ebda_pci_rsrc_queue(void)
1062 {
1063         struct ebda_pci_rsrc *resource, *next;
1064 
1065         list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1066                                  ebda_pci_rsrc_list) {
1067                 kfree (resource);
1068                 resource = NULL;
1069         }
1070 }
1071 
1072 static const struct pci_device_id id_table[] = {
1073         {
1074                 .vendor         = PCI_VENDOR_ID_IBM,
1075                 .device         = HPC_DEVICE_ID,
1076                 .subvendor      = PCI_VENDOR_ID_IBM,
1077                 .subdevice      = HPC_SUBSYSTEM_ID,
1078                 .class          = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1079         }, {}
1080 };
1081 
1082 MODULE_DEVICE_TABLE(pci, id_table);
1083 
1084 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1085 static struct pci_driver ibmphp_driver = {
1086         .name           = "ibmphp",
1087         .id_table       = id_table,
1088         .probe          = ibmphp_probe,
1089 };
1090 
1091 int ibmphp_register_pci(void)
1092 {
1093         struct controller *ctrl;
1094         int rc = 0;
1095 
1096         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1097                 if (ctrl->ctlr_type == 1) {
1098                         rc = pci_register_driver(&ibmphp_driver);
1099                         break;
1100                 }
1101         }
1102         return rc;
1103 }
1104 static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1105 {
1106         struct controller *ctrl;
1107 
1108         debug("inside ibmphp_probe\n");
1109 
1110         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1111                 if (ctrl->ctlr_type == 1) {
1112                         if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1113                                 ctrl->ctrl_dev = dev;
1114                                 debug("found device!!!\n");
1115                                 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1116                                 return 0;
1117                         }
1118                 }
1119         }
1120         return -ENODEV;
1121 }
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root/drivers/pci/hotplug/ibmphp_ebda.c

DEFINITIONS
