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 */
  38LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
  39LIST_HEAD(ibmphp_slot_head);
  40
  41/* Local variables */
  42static struct ebda_hpc_list *hpc_list_ptr;
  43static struct ebda_rsrc_list *rsrc_list_ptr;
  44static struct rio_table_hdr *rio_table_ptr = NULL;
  45static LIST_HEAD(ebda_hpc_head);
  46static LIST_HEAD(bus_info_head);
  47static LIST_HEAD(rio_vg_head);
  48static LIST_HEAD(rio_lo_head);
  49static LIST_HEAD(opt_vg_head);
  50static LIST_HEAD(opt_lo_head);
  51static void __iomem *io_mem;
  52
  53/* Local functions */
  54static int ebda_rsrc_controller(void);
  55static int ebda_rsrc_rsrc(void);
  56static int ebda_rio_table(void);
  57
  58static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
  59{
  60	return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
  61}
  62
  63static 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;
  84error_slots:
  85	kfree(controller->slots);
  86error_contr:
  87	kfree(controller);
  88error:
  89	return NULL;
  90}
  91
  92static void free_ebda_hpc(struct controller *controller)
  93{
  94	kfree(controller->slots);
  95	kfree(controller->buses);
  96	kfree(controller);
  97}
  98
  99static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
 100{
 101	return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
 102}
 103
 104static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
 105{
 106	return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
 107}
 108
 109static 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
 130static 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
 145static 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
 160static 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
 170static 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
 179static 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
 191static 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
 231int __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;
 390error_nodev:
 391	rc = -ENODEV;
 392out:
 393	iounmap(io_mem);
 394	return rc;
 395}
 396
 397/*
 398 * map info of scalability details and rio details from physical address
 399 */
 400static 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 */
 446static 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
 456static 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 */
 484static 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
 494static 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 */
 527static 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
 551static 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
 563static 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 */
 578static 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
 595static 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
 664static int fillslotinfo(struct hotplug_slot *hotplug_slot)
 665{
 666	struct slot *slot;
 667	int rc = 0;
 668
 669	if (!hotplug_slot || !hotplug_slot->private)
 670		return -EINVAL;
 671
 672	slot = hotplug_slot->private;
 673	rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
 674	if (rc)
 675		return rc;
 676
 677	// power - enabled:1  not:0
 678	hotplug_slot->info->power_status = SLOT_POWER(slot->status);
 679
 680	// attention - off:0, on:1, blinking:2
 681	hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
 682
 683	// latch - open:1 closed:0
 684	hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
 685
 686	// pci board - present:1 not:0
 687	if (SLOT_PRESENT(slot->status))
 688		hotplug_slot->info->adapter_status = 1;
 689	else
 690		hotplug_slot->info->adapter_status = 0;
 691/*
 692	if (slot->bus_on->supported_bus_mode
 693		&& (slot->bus_on->supported_speed == BUS_SPEED_66))
 694		hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
 695	else
 696		hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
 697*/
 698
 699	return rc;
 700}
 701
 702static void release_slot(struct hotplug_slot *hotplug_slot)
 703{
 704	struct slot *slot;
 705
 706	if (!hotplug_slot || !hotplug_slot->private)
 707		return;
 708
 709	slot = hotplug_slot->private;
 710	kfree(slot->hotplug_slot->info);
 711	kfree(slot->hotplug_slot);
 712	slot->ctrl = NULL;
 713	slot->bus_on = NULL;
 714
 715	/* we don't want to actually remove the resources, since free_resources will do just that */
 716	ibmphp_unconfigure_card(&slot, -1);
 717
 718	kfree(slot);
 719}
 720
 721static struct pci_driver ibmphp_driver;
 722
 723/*
 724 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
 725 * each hpc from physical address to a list of hot plug controllers based on
 726 * hpc descriptors.
 727 */
 728static int __init ebda_rsrc_controller(void)
 729{
 730	u16 addr, addr_slot, addr_bus;
 731	u8 ctlr_id, temp, bus_index;
 732	u16 ctlr, slot, bus;
 733	u16 slot_num, bus_num, index;
 734	struct hotplug_slot *hp_slot_ptr;
 735	struct controller *hpc_ptr;
 736	struct ebda_hpc_bus *bus_ptr;
 737	struct ebda_hpc_slot *slot_ptr;
 738	struct bus_info *bus_info_ptr1, *bus_info_ptr2;
 739	int rc;
 740	struct slot *tmp_slot;
 741	char name[SLOT_NAME_SIZE];
 742
 743	addr = hpc_list_ptr->phys_addr;
 744	for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
 745		bus_index = 1;
 746		ctlr_id = readb(io_mem + addr);
 747		addr += 1;
 748		slot_num = readb(io_mem + addr);
 749
 750		addr += 1;
 751		addr_slot = addr;	/* offset of slot structure */
 752		addr += (slot_num * 4);
 753
 754		bus_num = readb(io_mem + addr);
 755
 756		addr += 1;
 757		addr_bus = addr;	/* offset of bus */
 758		addr += (bus_num * 9);	/* offset of ctlr_type */
 759		temp = readb(io_mem + addr);
 760
 761		addr += 1;
 762		/* init hpc structure */
 763		hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
 764		if (!hpc_ptr) {
 765			rc = -ENOMEM;
 766			goto error_no_hpc;
 767		}
 768		hpc_ptr->ctlr_id = ctlr_id;
 769		hpc_ptr->ctlr_relative_id = ctlr;
 770		hpc_ptr->slot_count = slot_num;
 771		hpc_ptr->bus_count = bus_num;
 772		debug("now enter ctlr data structure ---\n");
 773		debug("ctlr id: %x\n", ctlr_id);
 774		debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
 775		debug("count of slots controlled by this ctlr: %x\n", slot_num);
 776		debug("count of buses controlled by this ctlr: %x\n", bus_num);
 777
 778		/* init slot structure, fetch slot, bus, cap... */
 779		slot_ptr = hpc_ptr->slots;
 780		for (slot = 0; slot < slot_num; slot++) {
 781			slot_ptr->slot_num = readb(io_mem + addr_slot);
 782			slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
 783			slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
 784			slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
 785
 786			// create bus_info lined list --- if only one slot per bus: slot_min = slot_max
 787
 788			bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
 789			if (!bus_info_ptr2) {
 790				bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
 791				if (!bus_info_ptr1) {
 792					rc = -ENOMEM;
 793					goto error_no_hp_slot;
 794				}
 795				bus_info_ptr1->slot_min = slot_ptr->slot_num;
 796				bus_info_ptr1->slot_max = slot_ptr->slot_num;
 797				bus_info_ptr1->slot_count += 1;
 798				bus_info_ptr1->busno = slot_ptr->slot_bus_num;
 799				bus_info_ptr1->index = bus_index++;
 800				bus_info_ptr1->current_speed = 0xff;
 801				bus_info_ptr1->current_bus_mode = 0xff;
 802
 803				bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
 804
 805				list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
 806
 807			} else {
 808				bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
 809				bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
 810				bus_info_ptr2->slot_count += 1;
 811
 812			}
 813
 814			// end of creating the bus_info linked list
 815
 816			slot_ptr++;
 817			addr_slot += 1;
 818		}
 819
 820		/* init bus structure */
 821		bus_ptr = hpc_ptr->buses;
 822		for (bus = 0; bus < bus_num; bus++) {
 823			bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
 824			bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
 825			bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
 826
 827			bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
 828
 829			bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
 830
 831			bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
 832
 833			bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
 834			if (bus_info_ptr2) {
 835				bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
 836				bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
 837				bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
 838				bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
 839				bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
 840			}
 841			bus_ptr++;
 842		}
 843
 844		hpc_ptr->ctlr_type = temp;
 845
 846		switch (hpc_ptr->ctlr_type) {
 847			case 1:
 848				hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
 849				hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
 850				hpc_ptr->irq = readb(io_mem + addr + 2);
 851				addr += 3;
 852				debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
 853					hpc_ptr->u.pci_ctlr.bus,
 854					hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
 855				break;
 856
 857			case 0:
 858				hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
 859				hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
 860				if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
 861						     (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
 862						     "ibmphp")) {
 863					rc = -ENODEV;
 864					goto error_no_hp_slot;
 865				}
 866				hpc_ptr->irq = readb(io_mem + addr + 4);
 867				addr += 5;
 868				break;
 869
 870			case 2:
 871			case 4:
 872				hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
 873				hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
 874				hpc_ptr->irq = readb(io_mem + addr + 5);
 875				addr += 6;
 876				break;
 877			default:
 878				rc = -ENODEV;
 879				goto error_no_hp_slot;
 880		}
 881
 882		//reorganize chassis' linked list
 883		combine_wpg_for_chassis();
 884		combine_wpg_for_expansion();
 885		hpc_ptr->revision = 0xff;
 886		hpc_ptr->options = 0xff;
 887		hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
 888		hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
 889
 890		// register slots with hpc core as well as create linked list of ibm slot
 891		for (index = 0; index < hpc_ptr->slot_count; index++) {
 892
 893			hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
 894			if (!hp_slot_ptr) {
 895				rc = -ENOMEM;
 896				goto error_no_hp_slot;
 897			}
 898
 899			hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 900			if (!hp_slot_ptr->info) {
 901				rc = -ENOMEM;
 902				goto error_no_hp_info;
 903			}
 904
 905			tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
 906			if (!tmp_slot) {
 907				rc = -ENOMEM;
 908				goto error_no_slot;
 909			}
 910
 911			tmp_slot->flag = 1;
 912
 913			tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
 914			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
 915				tmp_slot->supported_speed =  3;
 916			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
 917				tmp_slot->supported_speed =  2;
 918			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
 919				tmp_slot->supported_speed =  1;
 920
 921			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
 922				tmp_slot->supported_bus_mode = 1;
 923			else
 924				tmp_slot->supported_bus_mode = 0;
 925
 926
 927			tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
 928
 929			bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
 930			if (!bus_info_ptr1) {
 931				kfree(tmp_slot);
 932				rc = -ENODEV;
 933				goto error;
 934			}
 935			tmp_slot->bus_on = bus_info_ptr1;
 936			bus_info_ptr1 = NULL;
 937			tmp_slot->ctrl = hpc_ptr;
 938
 939			tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
 940			tmp_slot->number = hpc_ptr->slots[index].slot_num;
 941			tmp_slot->hotplug_slot = hp_slot_ptr;
 942
 943			hp_slot_ptr->private = tmp_slot;
 944			hp_slot_ptr->release = release_slot;
 945
 946			rc = fillslotinfo(hp_slot_ptr);
 947			if (rc)
 948				goto error;
 949
 950			rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private);
 951			if (rc)
 952				goto error;
 953			hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
 954
 955			// end of registering ibm slot with hotplug core
 956
 957			list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
 958		}
 959
 960		print_bus_info();
 961		list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
 962
 963	}			/* each hpc  */
 964
 965	list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
 966		snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
 967		pci_hp_register(tmp_slot->hotplug_slot,
 968			pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
 969	}
 970
 971	print_ebda_hpc();
 972	print_ibm_slot();
 973	return 0;
 974
 975error:
 976	kfree(hp_slot_ptr->private);
 977error_no_slot:
 978	kfree(hp_slot_ptr->info);
 979error_no_hp_info:
 980	kfree(hp_slot_ptr);
 981error_no_hp_slot:
 982	free_ebda_hpc(hpc_ptr);
 983error_no_hpc:
 984	iounmap(io_mem);
 985	return rc;
 986}
 987
 988/*
 989 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
 990 * pfm from the physical addr to a list of resource.
 991 */
 992static int __init ebda_rsrc_rsrc(void)
 993{
 994	u16 addr;
 995	short rsrc;
 996	u8 type, rsrc_type;
 997	struct ebda_pci_rsrc *rsrc_ptr;
 998
 999	addr = rsrc_list_ptr->phys_addr;
1000	debug("now entering rsrc land\n");
1001	debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1002
1003	for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1004		type = readb(io_mem + addr);
1005
1006		addr += 1;
1007		rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1008
1009		if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1010			rsrc_ptr = alloc_ebda_pci_rsrc();
1011			if (!rsrc_ptr) {
1012				iounmap(io_mem);
1013				return -ENOMEM;
1014			}
1015			rsrc_ptr->rsrc_type = type;
1016
1017			rsrc_ptr->bus_num = readb(io_mem + addr);
1018			rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1019			rsrc_ptr->start_addr = readw(io_mem + addr + 2);
1020			rsrc_ptr->end_addr = readw(io_mem + addr + 4);
1021			addr += 6;
1022
1023			debug("rsrc from io type ----\n");
1024			debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1025				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1026
1027			list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1028		}
1029
1030		if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1031			rsrc_ptr = alloc_ebda_pci_rsrc();
1032			if (!rsrc_ptr) {
1033				iounmap(io_mem);
1034				return -ENOMEM;
1035			}
1036			rsrc_ptr->rsrc_type = type;
1037
1038			rsrc_ptr->bus_num = readb(io_mem + addr);
1039			rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1040			rsrc_ptr->start_addr = readl(io_mem + addr + 2);
1041			rsrc_ptr->end_addr = readl(io_mem + addr + 6);
1042			addr += 10;
1043
1044			debug("rsrc from mem or pfm ---\n");
1045			debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1046				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1047
1048			list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1049		}
1050	}
1051	kfree(rsrc_list_ptr);
1052	rsrc_list_ptr = NULL;
1053	print_ebda_pci_rsrc();
1054	return 0;
1055}
1056
1057u16 ibmphp_get_total_controllers(void)
1058{
1059	return hpc_list_ptr->num_ctlrs;
1060}
1061
1062struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
1063{
1064	struct slot *slot;
1065
1066	list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1067		if (slot->number == physical_num)
1068			return slot;
1069	}
1070	return NULL;
1071}
1072
1073/* To find:
1074 *	- the smallest slot number
1075 *	- the largest slot number
1076 *	- the total number of the slots based on each bus
1077 *	  (if only one slot per bus slot_min = slot_max )
1078 */
1079struct bus_info *ibmphp_find_same_bus_num(u32 num)
1080{
1081	struct bus_info *ptr;
1082
1083	list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1084		if (ptr->busno == num)
1085			 return ptr;
1086	}
1087	return NULL;
1088}
1089
1090/*  Finding relative bus number, in order to map corresponding
1091 *  bus register
1092 */
1093int ibmphp_get_bus_index(u8 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->index;
1100	}
1101	return -ENODEV;
1102}
1103
1104void ibmphp_free_bus_info_queue(void)
1105{
1106	struct bus_info *bus_info, *next;
1107
1108	list_for_each_entry_safe(bus_info, next, &bus_info_head,
1109				 bus_info_list) {
1110		kfree (bus_info);
1111	}
1112}
1113
1114void ibmphp_free_ebda_hpc_queue(void)
1115{
1116	struct controller *controller = NULL, *next;
1117	int pci_flag = 0;
1118
1119	list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1120				 ebda_hpc_list) {
1121		if (controller->ctlr_type == 0)
1122			release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1123		else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1124			++pci_flag;
1125			pci_unregister_driver(&ibmphp_driver);
1126		}
1127		free_ebda_hpc(controller);
1128	}
1129}
1130
1131void ibmphp_free_ebda_pci_rsrc_queue(void)
1132{
1133	struct ebda_pci_rsrc *resource, *next;
1134
1135	list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1136				 ebda_pci_rsrc_list) {
1137		kfree (resource);
1138		resource = NULL;
1139	}
1140}
1141
1142static const struct pci_device_id id_table[] = {
1143	{
1144		.vendor		= PCI_VENDOR_ID_IBM,
1145		.device		= HPC_DEVICE_ID,
1146		.subvendor	= PCI_VENDOR_ID_IBM,
1147		.subdevice	= HPC_SUBSYSTEM_ID,
1148		.class		= ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1149	}, {}
1150};
1151
1152MODULE_DEVICE_TABLE(pci, id_table);
1153
1154static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1155static struct pci_driver ibmphp_driver = {
1156	.name		= "ibmphp",
1157	.id_table	= id_table,
1158	.probe		= ibmphp_probe,
1159};
1160
1161int ibmphp_register_pci(void)
1162{
1163	struct controller *ctrl;
1164	int rc = 0;
1165
1166	list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1167		if (ctrl->ctlr_type == 1) {
1168			rc = pci_register_driver(&ibmphp_driver);
1169			break;
1170		}
1171	}
1172	return rc;
1173}
1174static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1175{
1176	struct controller *ctrl;
1177
1178	debug("inside ibmphp_probe\n");
1179
1180	list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1181		if (ctrl->ctlr_type == 1) {
1182			if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1183				ctrl->ctrl_dev = dev;
1184				debug("found device!!!\n");
1185				debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1186				return 0;
1187			}
1188		}
1189	}
1190	return -ENODEV;
1191}