1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Compaq Hot Plug Controller Driver
   4 *
   5 * Copyright (C) 1995,2001 Compaq Computer Corporation
   6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   7 * Copyright (C) 2001 IBM Corp.
   8 *
   9 * All rights reserved.
  10 *
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  11 * Send feedback to <greg@kroah.com>
  12 *
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/kernel.h>
  17#include <linux/types.h>
  18#include <linux/slab.h>
  19#include <linux/workqueue.h>
  20#include <linux/interrupt.h>
  21#include <linux/delay.h>
  22#include <linux/wait.h>
  23#include <linux/pci.h>
  24#include <linux/pci_hotplug.h>
  25#include <linux/kthread.h>
  26#include "cpqphp.h"
  27
  28static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
  29			u8 behind_bridge, struct resource_lists *resources);
  30static int configure_new_function(struct controller *ctrl, struct pci_func *func,
  31			u8 behind_bridge, struct resource_lists *resources);
  32static void interrupt_event_handler(struct controller *ctrl);
  33
  34
  35static struct task_struct *cpqhp_event_thread;
  36static struct timer_list *pushbutton_pending;	/* = NULL */
  37
  38/* delay is in jiffies to wait for */
  39static void long_delay(int delay)
  40{
  41	/*
  42	 * XXX(hch): if someone is bored please convert all callers
  43	 * to call msleep_interruptible directly.  They really want
  44	 * to specify timeouts in natural units and spend a lot of
  45	 * effort converting them to jiffies..
  46	 */
  47	msleep_interruptible(jiffies_to_msecs(delay));
  48}
  49
  50
  51/* FIXME: The following line needs to be somewhere else... */
  52#define WRONG_BUS_FREQUENCY 0x07
  53static u8 handle_switch_change(u8 change, struct controller *ctrl)
  54{
  55	int hp_slot;
  56	u8 rc = 0;
  57	u16 temp_word;
  58	struct pci_func *func;
  59	struct event_info *taskInfo;
  60
  61	if (!change)
  62		return 0;
  63
  64	/* Switch Change */
  65	dbg("cpqsbd:  Switch interrupt received.\n");
  66
  67	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
  68		if (change & (0x1L << hp_slot)) {
  69			/*
  70			 * this one changed.
  71			 */
  72			func = cpqhp_slot_find(ctrl->bus,
  73				(hp_slot + ctrl->slot_device_offset), 0);
  74
  75			/* this is the structure that tells the worker thread
  76			 * what to do
  77			 */
  78			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
  79			ctrl->next_event = (ctrl->next_event + 1) % 10;
  80			taskInfo->hp_slot = hp_slot;
  81
  82			rc++;
  83
  84			temp_word = ctrl->ctrl_int_comp >> 16;
  85			func->presence_save = (temp_word >> hp_slot) & 0x01;
  86			func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
  87
  88			if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
  89				/*
  90				 * Switch opened
  91				 */
  92
  93				func->switch_save = 0;
  94
  95				taskInfo->event_type = INT_SWITCH_OPEN;
  96			} else {
  97				/*
  98				 * Switch closed
  99				 */
 100
 101				func->switch_save = 0x10;
 102
 103				taskInfo->event_type = INT_SWITCH_CLOSE;
 104			}
 105		}
 106	}
 107
 108	return rc;
 109}
 110
 111/**
 112 * cpqhp_find_slot - find the struct slot of given device
 113 * @ctrl: scan lots of this controller
 114 * @device: the device id to find
 115 */
 116static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device)
 117{
 118	struct slot *slot = ctrl->slot;
 119
 120	while (slot && (slot->device != device))
 121		slot = slot->next;
 122
 123	return slot;
 124}
 125
 126
 127static u8 handle_presence_change(u16 change, struct controller *ctrl)
 128{
 129	int hp_slot;
 130	u8 rc = 0;
 131	u8 temp_byte;
 132	u16 temp_word;
 133	struct pci_func *func;
 134	struct event_info *taskInfo;
 135	struct slot *p_slot;
 136
 137	if (!change)
 138		return 0;
 139
 140	/*
 141	 * Presence Change
 142	 */
 143	dbg("cpqsbd:  Presence/Notify input change.\n");
 144	dbg("         Changed bits are 0x%4.4x\n", change);
 145
 146	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
 147		if (change & (0x0101 << hp_slot)) {
 148			/*
 149			 * this one changed.
 150			 */
 151			func = cpqhp_slot_find(ctrl->bus,
 152				(hp_slot + ctrl->slot_device_offset), 0);
 153
 154			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 155			ctrl->next_event = (ctrl->next_event + 1) % 10;
 156			taskInfo->hp_slot = hp_slot;
 157
 158			rc++;
 159
 160			p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4));
 161			if (!p_slot)
 162				return 0;
 163
 164			/* If the switch closed, must be a button
 165			 * If not in button mode, nevermind
 166			 */
 167			if (func->switch_save && (ctrl->push_button == 1)) {
 168				temp_word = ctrl->ctrl_int_comp >> 16;
 169				temp_byte = (temp_word >> hp_slot) & 0x01;
 170				temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
 171
 172				if (temp_byte != func->presence_save) {
 173					/*
 174					 * button Pressed (doesn't do anything)
 175					 */
 176					dbg("hp_slot %d button pressed\n", hp_slot);
 177					taskInfo->event_type = INT_BUTTON_PRESS;
 178				} else {
 179					/*
 180					 * button Released - TAKE ACTION!!!!
 181					 */
 182					dbg("hp_slot %d button released\n", hp_slot);
 183					taskInfo->event_type = INT_BUTTON_RELEASE;
 184
 185					/* Cancel if we are still blinking */
 186					if ((p_slot->state == BLINKINGON_STATE)
 187					    || (p_slot->state == BLINKINGOFF_STATE)) {
 188						taskInfo->event_type = INT_BUTTON_CANCEL;
 189						dbg("hp_slot %d button cancel\n", hp_slot);
 190					} else if ((p_slot->state == POWERON_STATE)
 191						   || (p_slot->state == POWEROFF_STATE)) {
 192						/* info(msg_button_ignore, p_slot->number); */
 193						taskInfo->event_type = INT_BUTTON_IGNORE;
 194						dbg("hp_slot %d button ignore\n", hp_slot);
 195					}
 196				}
 197			} else {
 198				/* Switch is open, assume a presence change
 199				 * Save the presence state
 200				 */
 201				temp_word = ctrl->ctrl_int_comp >> 16;
 202				func->presence_save = (temp_word >> hp_slot) & 0x01;
 203				func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
 204
 205				if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) ||
 206				    (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) {
 207					/* Present */
 208					taskInfo->event_type = INT_PRESENCE_ON;
 209				} else {
 210					/* Not Present */
 211					taskInfo->event_type = INT_PRESENCE_OFF;
 212				}
 213			}
 214		}
 215	}
 216
 217	return rc;
 218}
 219
 220
 221static u8 handle_power_fault(u8 change, struct controller *ctrl)
 222{
 223	int hp_slot;
 224	u8 rc = 0;
 225	struct pci_func *func;
 226	struct event_info *taskInfo;
 227
 228	if (!change)
 229		return 0;
 230
 231	/*
 232	 * power fault
 233	 */
 234
 235	info("power fault interrupt\n");
 236
 237	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
 238		if (change & (0x01 << hp_slot)) {
 239			/*
 240			 * this one changed.
 241			 */
 242			func = cpqhp_slot_find(ctrl->bus,
 243				(hp_slot + ctrl->slot_device_offset), 0);
 244
 245			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 246			ctrl->next_event = (ctrl->next_event + 1) % 10;
 247			taskInfo->hp_slot = hp_slot;
 248
 249			rc++;
 250
 251			if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) {
 252				/*
 253				 * power fault Cleared
 254				 */
 255				func->status = 0x00;
 256
 257				taskInfo->event_type = INT_POWER_FAULT_CLEAR;
 258			} else {
 259				/*
 260				 * power fault
 261				 */
 262				taskInfo->event_type = INT_POWER_FAULT;
 263
 264				if (ctrl->rev < 4) {
 265					amber_LED_on(ctrl, hp_slot);
 266					green_LED_off(ctrl, hp_slot);
 267					set_SOGO(ctrl);
 268
 269					/* this is a fatal condition, we want
 270					 * to crash the machine to protect from
 271					 * data corruption. simulated_NMI
 272					 * shouldn't ever return */
 273					/* FIXME
 274					simulated_NMI(hp_slot, ctrl); */
 275
 276					/* The following code causes a software
 277					 * crash just in case simulated_NMI did
 278					 * return */
 279					/*FIXME
 280					panic(msg_power_fault); */
 281				} else {
 282					/* set power fault status for this board */
 283					func->status = 0xFF;
 284					info("power fault bit %x set\n", hp_slot);
 285				}
 286			}
 287		}
 288	}
 289
 290	return rc;
 291}
 292
 293
 294/**
 295 * sort_by_size - sort nodes on the list by their length, smallest first.
 296 * @head: list to sort
 297 */
 298static int sort_by_size(struct pci_resource **head)
 299{
 300	struct pci_resource *current_res;
 301	struct pci_resource *next_res;
 302	int out_of_order = 1;
 303
 304	if (!(*head))
 305		return 1;
 306
 307	if (!((*head)->next))
 308		return 0;
 309
 310	while (out_of_order) {
 311		out_of_order = 0;
 312
 313		/* Special case for swapping list head */
 314		if (((*head)->next) &&
 315		    ((*head)->length > (*head)->next->length)) {
 316			out_of_order++;
 317			current_res = *head;
 318			*head = (*head)->next;
 319			current_res->next = (*head)->next;
 320			(*head)->next = current_res;
 321		}
 322
 323		current_res = *head;
 324
 325		while (current_res->next && current_res->next->next) {
 326			if (current_res->next->length > current_res->next->next->length) {
 327				out_of_order++;
 328				next_res = current_res->next;
 329				current_res->next = current_res->next->next;
 330				current_res = current_res->next;
 331				next_res->next = current_res->next;
 332				current_res->next = next_res;
 333			} else
 334				current_res = current_res->next;
 335		}
 336	}  /* End of out_of_order loop */
 337
 338	return 0;
 339}
 340
 341
 342/**
 343 * sort_by_max_size - sort nodes on the list by their length, largest first.
 344 * @head: list to sort
 345 */
 346static int sort_by_max_size(struct pci_resource **head)
 347{
 348	struct pci_resource *current_res;
 349	struct pci_resource *next_res;
 350	int out_of_order = 1;
 351
 352	if (!(*head))
 353		return 1;
 354
 355	if (!((*head)->next))
 356		return 0;
 357
 358	while (out_of_order) {
 359		out_of_order = 0;
 360
 361		/* Special case for swapping list head */
 362		if (((*head)->next) &&
 363		    ((*head)->length < (*head)->next->length)) {
 364			out_of_order++;
 365			current_res = *head;
 366			*head = (*head)->next;
 367			current_res->next = (*head)->next;
 368			(*head)->next = current_res;
 369		}
 370
 371		current_res = *head;
 372
 373		while (current_res->next && current_res->next->next) {
 374			if (current_res->next->length < current_res->next->next->length) {
 375				out_of_order++;
 376				next_res = current_res->next;
 377				current_res->next = current_res->next->next;
 378				current_res = current_res->next;
 379				next_res->next = current_res->next;
 380				current_res->next = next_res;
 381			} else
 382				current_res = current_res->next;
 383		}
 384	}  /* End of out_of_order loop */
 385
 386	return 0;
 387}
 388
 389
 390/**
 391 * do_pre_bridge_resource_split - find node of resources that are unused
 392 * @head: new list head
 393 * @orig_head: original list head
 394 * @alignment: max node size (?)
 395 */
 396static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head,
 397				struct pci_resource **orig_head, u32 alignment)
 398{
 399	struct pci_resource *prevnode = NULL;
 400	struct pci_resource *node;
 401	struct pci_resource *split_node;
 402	u32 rc;
 403	u32 temp_dword;
 404	dbg("do_pre_bridge_resource_split\n");
 405
 406	if (!(*head) || !(*orig_head))
 407		return NULL;
 408
 409	rc = cpqhp_resource_sort_and_combine(head);
 410
 411	if (rc)
 412		return NULL;
 413
 414	if ((*head)->base != (*orig_head)->base)
 415		return NULL;
 416
 417	if ((*head)->length == (*orig_head)->length)
 418		return NULL;
 419
 420
 421	/* If we got here, there the bridge requires some of the resource, but
 422	 * we may be able to split some off of the front
 423	 */
 424
 425	node = *head;
 426
 427	if (node->length & (alignment - 1)) {
 428		/* this one isn't an aligned length, so we'll make a new entry
 429		 * and split it up.
 430		 */
 431		split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 432
 433		if (!split_node)
 434			return NULL;
 435
 436		temp_dword = (node->length | (alignment-1)) + 1 - alignment;
 437
 438		split_node->base = node->base;
 439		split_node->length = temp_dword;
 440
 441		node->length -= temp_dword;
 442		node->base += split_node->length;
 443
 444		/* Put it in the list */
 445		*head = split_node;
 446		split_node->next = node;
 447	}
 448
 449	if (node->length < alignment)
 450		return NULL;
 451
 452	/* Now unlink it */
 453	if (*head == node) {
 454		*head = node->next;
 455	} else {
 456		prevnode = *head;
 457		while (prevnode->next != node)
 458			prevnode = prevnode->next;
 459
 460		prevnode->next = node->next;
 461	}
 462	node->next = NULL;
 463
 464	return node;
 465}
 466
 467
 468/**
 469 * do_bridge_resource_split - find one node of resources that aren't in use
 470 * @head: list head
 471 * @alignment: max node size (?)
 472 */
 473static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment)
 474{
 475	struct pci_resource *prevnode = NULL;
 476	struct pci_resource *node;
 477	u32 rc;
 478	u32 temp_dword;
 479
 480	rc = cpqhp_resource_sort_and_combine(head);
 481
 482	if (rc)
 483		return NULL;
 484
 485	node = *head;
 486
 487	while (node->next) {
 488		prevnode = node;
 489		node = node->next;
 490		kfree(prevnode);
 491	}
 492
 493	if (node->length < alignment)
 494		goto error;
 495
 496	if (node->base & (alignment - 1)) {
 497		/* Short circuit if adjusted size is too small */
 498		temp_dword = (node->base | (alignment-1)) + 1;
 499		if ((node->length - (temp_dword - node->base)) < alignment)
 500			goto error;
 501
 502		node->length -= (temp_dword - node->base);
 503		node->base = temp_dword;
 504	}
 505
 506	if (node->length & (alignment - 1))
 507		/* There's stuff in use after this node */
 508		goto error;
 509
 510	return node;
 511error:
 512	kfree(node);
 513	return NULL;
 514}
 515
 516
 517/**
 518 * get_io_resource - find first node of given size not in ISA aliasing window.
 519 * @head: list to search
 520 * @size: size of node to find, must be a power of two.
 521 *
 522 * Description: This function sorts the resource list by size and then returns
 523 * returns the first node of "size" length that is not in the ISA aliasing
 524 * window.  If it finds a node larger than "size" it will split it up.
 525 */
 526static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
 527{
 528	struct pci_resource *prevnode;
 529	struct pci_resource *node;
 530	struct pci_resource *split_node;
 531	u32 temp_dword;
 532
 533	if (!(*head))
 534		return NULL;
 535
 536	if (cpqhp_resource_sort_and_combine(head))
 537		return NULL;
 538
 539	if (sort_by_size(head))
 540		return NULL;
 541
 542	for (node = *head; node; node = node->next) {
 543		if (node->length < size)
 544			continue;
 545
 546		if (node->base & (size - 1)) {
 547			/* this one isn't base aligned properly
 548			 * so we'll make a new entry and split it up
 549			 */
 550			temp_dword = (node->base | (size-1)) + 1;
 551
 552			/* Short circuit if adjusted size is too small */
 553			if ((node->length - (temp_dword - node->base)) < size)
 554				continue;
 555
 556			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 557
 558			if (!split_node)
 559				return NULL;
 560
 561			split_node->base = node->base;
 562			split_node->length = temp_dword - node->base;
 563			node->base = temp_dword;
 564			node->length -= split_node->length;
 565
 566			/* Put it in the list */
 567			split_node->next = node->next;
 568			node->next = split_node;
 569		} /* End of non-aligned base */
 570
 571		/* Don't need to check if too small since we already did */
 572		if (node->length > size) {
 573			/* this one is longer than we need
 574			 * so we'll make a new entry and split it up
 575			 */
 576			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 577
 578			if (!split_node)
 579				return NULL;
 580
 581			split_node->base = node->base + size;
 582			split_node->length = node->length - size;
 583			node->length = size;
 584
 585			/* Put it in the list */
 586			split_node->next = node->next;
 587			node->next = split_node;
 588		}  /* End of too big on top end */
 589
 590		/* For IO make sure it's not in the ISA aliasing space */
 591		if (node->base & 0x300L)
 592			continue;
 593
 594		/* If we got here, then it is the right size
 595		 * Now take it out of the list and break
 596		 */
 597		if (*head == node) {
 598			*head = node->next;
 599		} else {
 600			prevnode = *head;
 601			while (prevnode->next != node)
 602				prevnode = prevnode->next;
 603
 604			prevnode->next = node->next;
 605		}
 606		node->next = NULL;
 607		break;
 608	}
 609
 610	return node;
 611}
 612
 613
 614/**
 615 * get_max_resource - get largest node which has at least the given size.
 616 * @head: the list to search the node in
 617 * @size: the minimum size of the node to find
 618 *
 619 * Description: Gets the largest node that is at least "size" big from the
 620 * list pointed to by head.  It aligns the node on top and bottom
 621 * to "size" alignment before returning it.
 622 */
 623static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size)
 624{
 625	struct pci_resource *max;
 626	struct pci_resource *temp;
 627	struct pci_resource *split_node;
 628	u32 temp_dword;
 629
 630	if (cpqhp_resource_sort_and_combine(head))
 631		return NULL;
 632
 633	if (sort_by_max_size(head))
 634		return NULL;
 635
 636	for (max = *head; max; max = max->next) {
 637		/* If not big enough we could probably just bail,
 638		 * instead we'll continue to the next.
 639		 */
 640		if (max->length < size)
 641			continue;
 642
 643		if (max->base & (size - 1)) {
 644			/* this one isn't base aligned properly
 645			 * so we'll make a new entry and split it up
 646			 */
 647			temp_dword = (max->base | (size-1)) + 1;
 648
 649			/* Short circuit if adjusted size is too small */
 650			if ((max->length - (temp_dword - max->base)) < size)
 651				continue;
 652
 653			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 654
 655			if (!split_node)
 656				return NULL;
 657
 658			split_node->base = max->base;
 659			split_node->length = temp_dword - max->base;
 660			max->base = temp_dword;
 661			max->length -= split_node->length;
 662
 663			split_node->next = max->next;
 664			max->next = split_node;
 665		}
 666
 667		if ((max->base + max->length) & (size - 1)) {
 668			/* this one isn't end aligned properly at the top
 669			 * so we'll make a new entry and split it up
 670			 */
 671			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 672
 673			if (!split_node)
 674				return NULL;
 675			temp_dword = ((max->base + max->length) & ~(size - 1));
 676			split_node->base = temp_dword;
 677			split_node->length = max->length + max->base
 678					     - split_node->base;
 679			max->length -= split_node->length;
 680
 681			split_node->next = max->next;
 682			max->next = split_node;
 683		}
 684
 685		/* Make sure it didn't shrink too much when we aligned it */
 686		if (max->length < size)
 687			continue;
 688
 689		/* Now take it out of the list */
 690		temp = *head;
 691		if (temp == max) {
 692			*head = max->next;
 693		} else {
 694			while (temp && temp->next != max)
 695				temp = temp->next;
 696
 697			if (temp)
 698				temp->next = max->next;
 699		}
 700
 701		max->next = NULL;
 702		break;
 703	}
 704
 705	return max;
 706}
 707
 708
 709/**
 710 * get_resource - find resource of given size and split up larger ones.
 711 * @head: the list to search for resources
 712 * @size: the size limit to use
 713 *
 714 * Description: This function sorts the resource list by size and then
 715 * returns the first node of "size" length.  If it finds a node
 716 * larger than "size" it will split it up.
 717 *
 718 * size must be a power of two.
 719 */
 720static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
 721{
 722	struct pci_resource *prevnode;
 723	struct pci_resource *node;
 724	struct pci_resource *split_node;
 725	u32 temp_dword;
 726
 727	if (cpqhp_resource_sort_and_combine(head))
 728		return NULL;
 729
 730	if (sort_by_size(head))
 731		return NULL;
 732
 733	for (node = *head; node; node = node->next) {
 734		dbg("%s: req_size =%x node=%p, base=%x, length=%x\n",
 735		    __func__, size, node, node->base, node->length);
 736		if (node->length < size)
 737			continue;
 738
 739		if (node->base & (size - 1)) {
 740			dbg("%s: not aligned\n", __func__);
 741			/* this one isn't base aligned properly
 742			 * so we'll make a new entry and split it up
 743			 */
 744			temp_dword = (node->base | (size-1)) + 1;
 745
 746			/* Short circuit if adjusted size is too small */
 747			if ((node->length - (temp_dword - node->base)) < size)
 748				continue;
 749
 750			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 751
 752			if (!split_node)
 753				return NULL;
 754
 755			split_node->base = node->base;
 756			split_node->length = temp_dword - node->base;
 757			node->base = temp_dword;
 758			node->length -= split_node->length;
 759
 760			split_node->next = node->next;
 761			node->next = split_node;
 762		} /* End of non-aligned base */
 763
 764		/* Don't need to check if too small since we already did */
 765		if (node->length > size) {
 766			dbg("%s: too big\n", __func__);
 767			/* this one is longer than we need
 768			 * so we'll make a new entry and split it up
 769			 */
 770			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 771
 772			if (!split_node)
 773				return NULL;
 774
 775			split_node->base = node->base + size;
 776			split_node->length = node->length - size;
 777			node->length = size;
 778
 779			/* Put it in the list */
 780			split_node->next = node->next;
 781			node->next = split_node;
 782		}  /* End of too big on top end */
 783
 784		dbg("%s: got one!!!\n", __func__);
 785		/* If we got here, then it is the right size
 786		 * Now take it out of the list */
 787		if (*head == node) {
 788			*head = node->next;
 789		} else {
 790			prevnode = *head;
 791			while (prevnode->next != node)
 792				prevnode = prevnode->next;
 793
 794			prevnode->next = node->next;
 795		}
 796		node->next = NULL;
 797		break;
 798	}
 799	return node;
 800}
 801
 802
 803/**
 804 * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up
 805 * @head: the list to sort and clean up
 806 *
 807 * Description: Sorts all of the nodes in the list in ascending order by
 808 * their base addresses.  Also does garbage collection by
 809 * combining adjacent nodes.
 810 *
 811 * Returns %0 if success.
 812 */
 813int cpqhp_resource_sort_and_combine(struct pci_resource **head)
 814{
 815	struct pci_resource *node1;
 816	struct pci_resource *node2;
 817	int out_of_order = 1;
 818
 819	dbg("%s: head = %p, *head = %p\n", __func__, head, *head);
 820
 821	if (!(*head))
 822		return 1;
 823
 824	dbg("*head->next = %p\n", (*head)->next);
 825
 826	if (!(*head)->next)
 827		return 0;	/* only one item on the list, already sorted! */
 828
 829	dbg("*head->base = 0x%x\n", (*head)->base);
 830	dbg("*head->next->base = 0x%x\n", (*head)->next->base);
 831	while (out_of_order) {
 832		out_of_order = 0;
 833
 834		/* Special case for swapping list head */
 835		if (((*head)->next) &&
 836		    ((*head)->base > (*head)->next->base)) {
 837			node1 = *head;
 838			(*head) = (*head)->next;
 839			node1->next = (*head)->next;
 840			(*head)->next = node1;
 841			out_of_order++;
 842		}
 843
 844		node1 = (*head);
 845
 846		while (node1->next && node1->next->next) {
 847			if (node1->next->base > node1->next->next->base) {
 848				out_of_order++;
 849				node2 = node1->next;
 850				node1->next = node1->next->next;
 851				node1 = node1->next;
 852				node2->next = node1->next;
 853				node1->next = node2;
 854			} else
 855				node1 = node1->next;
 856		}
 857	}  /* End of out_of_order loop */
 858
 859	node1 = *head;
 860
 861	while (node1 && node1->next) {
 862		if ((node1->base + node1->length) == node1->next->base) {
 863			/* Combine */
 864			dbg("8..\n");
 865			node1->length += node1->next->length;
 866			node2 = node1->next;
 867			node1->next = node1->next->next;
 868			kfree(node2);
 869		} else
 870			node1 = node1->next;
 871	}
 872
 873	return 0;
 874}
 875
 876
 877irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data)
 878{
 879	struct controller *ctrl = data;
 880	u8 schedule_flag = 0;
 881	u8 reset;
 882	u16 misc;
 883	u32 Diff;
 884	u32 temp_dword;
 885
 886
 887	misc = readw(ctrl->hpc_reg + MISC);
 888	/*
 889	 * Check to see if it was our interrupt
 890	 */
 891	if (!(misc & 0x000C))
 892		return IRQ_NONE;
 893
 894	if (misc & 0x0004) {
 895		/*
 896		 * Serial Output interrupt Pending
 897		 */
 898
 899		/* Clear the interrupt */
 900		misc |= 0x0004;
 901		writew(misc, ctrl->hpc_reg + MISC);
 902
 903		/* Read to clear posted writes */
 904		misc = readw(ctrl->hpc_reg + MISC);
 905
 906		dbg("%s - waking up\n", __func__);
 907		wake_up_interruptible(&ctrl->queue);
 908	}
 909
 910	if (misc & 0x0008) {
 911		/* General-interrupt-input interrupt Pending */
 912		Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp;
 913
 914		ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 915
 916		/* Clear the interrupt */
 917		writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR);
 918
 919		/* Read it back to clear any posted writes */
 920		temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 921
 922		if (!Diff)
 923			/* Clear all interrupts */
 924			writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR);
 925
 926		schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl);
 927		schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl);
 928		schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl);
 929	}
 930
 931	reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
 932	if (reset & 0x40) {
 933		/* Bus reset has completed */
 934		reset &= 0xCF;
 935		writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE);
 936		reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
 937		wake_up_interruptible(&ctrl->queue);
 938	}
 939
 940	if (schedule_flag) {
 941		wake_up_process(cpqhp_event_thread);
 942		dbg("Waking even thread");
 943	}
 944	return IRQ_HANDLED;
 945}
 946
 947
 948/**
 949 * cpqhp_slot_create - Creates a node and adds it to the proper bus.
 950 * @busnumber: bus where new node is to be located
 951 *
 952 * Returns pointer to the new node or %NULL if unsuccessful.
 953 */
 954struct pci_func *cpqhp_slot_create(u8 busnumber)
 955{
 956	struct pci_func *new_slot;
 957	struct pci_func *next;
 958
 959	new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL);
 960	if (new_slot == NULL)
 961		return new_slot;
 962
 963	new_slot->next = NULL;
 964	new_slot->configured = 1;
 965
 966	if (cpqhp_slot_list[busnumber] == NULL) {
 967		cpqhp_slot_list[busnumber] = new_slot;
 968	} else {
 969		next = cpqhp_slot_list[busnumber];
 970		while (next->next != NULL)
 971			next = next->next;
 972		next->next = new_slot;
 973	}
 974	return new_slot;
 975}
 976
 977
 978/**
 979 * slot_remove - Removes a node from the linked list of slots.
 980 * @old_slot: slot to remove
 981 *
 982 * Returns %0 if successful, !0 otherwise.
 983 */
 984static int slot_remove(struct pci_func *old_slot)
 985{
 986	struct pci_func *next;
 987
 988	if (old_slot == NULL)
 989		return 1;
 990
 991	next = cpqhp_slot_list[old_slot->bus];
 992	if (next == NULL)
 993		return 1;
 994
 995	if (next == old_slot) {
 996		cpqhp_slot_list[old_slot->bus] = old_slot->next;
 997		cpqhp_destroy_board_resources(old_slot);
 998		kfree(old_slot);
 999		return 0;
1000	}
1001
1002	while ((next->next != old_slot) && (next->next != NULL))
1003		next = next->next;
1004
1005	if (next->next == old_slot) {
1006		next->next = old_slot->next;
1007		cpqhp_destroy_board_resources(old_slot);
1008		kfree(old_slot);
1009		return 0;
1010	} else
1011		return 2;
1012}
1013
1014
1015/**
1016 * bridge_slot_remove - Removes a node from the linked list of slots.
1017 * @bridge: bridge to remove
1018 *
1019 * Returns %0 if successful, !0 otherwise.
1020 */
1021static int bridge_slot_remove(struct pci_func *bridge)
1022{
1023	u8 subordinateBus, secondaryBus;
1024	u8 tempBus;
1025	struct pci_func *next;
1026
1027	secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
1028	subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
1029
1030	for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
1031		next = cpqhp_slot_list[tempBus];
1032
1033		while (!slot_remove(next))
1034			next = cpqhp_slot_list[tempBus];
1035	}
1036
1037	next = cpqhp_slot_list[bridge->bus];
1038
1039	if (next == NULL)
1040		return 1;
1041
1042	if (next == bridge) {
1043		cpqhp_slot_list[bridge->bus] = bridge->next;
1044		goto out;
1045	}
1046
1047	while ((next->next != bridge) && (next->next != NULL))
1048		next = next->next;
1049
1050	if (next->next != bridge)
1051		return 2;
1052	next->next = bridge->next;
1053out:
1054	kfree(bridge);
1055	return 0;
1056}
1057
1058
1059/**
1060 * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1061 * @bus: bus to find
1062 * @device: device to find
1063 * @index: is %0 for first function found, %1 for the second...
1064 *
1065 * Returns pointer to the node if successful, %NULL otherwise.
1066 */
1067struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
1068{
1069	int found = -1;
1070	struct pci_func *func;
1071
1072	func = cpqhp_slot_list[bus];
1073
1074	if ((func == NULL) || ((func->device == device) && (index == 0)))
1075		return func;
1076
1077	if (func->device == device)
1078		found++;
1079
1080	while (func->next != NULL) {
1081		func = func->next;
1082
1083		if (func->device == device)
1084			found++;
1085
1086		if (found == index)
1087			return func;
1088	}
1089
1090	return NULL;
1091}
1092
1093
1094/* DJZ: I don't think is_bridge will work as is.
1095 * FIXME */
1096static int is_bridge(struct pci_func *func)
1097{
1098	/* Check the header type */
1099	if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
1100		return 1;
1101	else
1102		return 0;
1103}
1104
1105
1106/**
1107 * set_controller_speed - set the frequency and/or mode of a specific controller segment.
1108 * @ctrl: controller to change frequency/mode for.
1109 * @adapter_speed: the speed of the adapter we want to match.
1110 * @hp_slot: the slot number where the adapter is installed.
1111 *
1112 * Returns %0 if we successfully change frequency and/or mode to match the
1113 * adapter speed.
1114 */
1115static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
1116{
1117	struct slot *slot;
1118	struct pci_bus *bus = ctrl->pci_bus;
1119	u8 reg;
1120	u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
1121	u16 reg16;
1122	u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
1123
1124	if (bus->cur_bus_speed == adapter_speed)
1125		return 0;
1126
1127	/* We don't allow freq/mode changes if we find another adapter running
1128	 * in another slot on this controller
1129	 */
1130	for (slot = ctrl->slot; slot; slot = slot->next) {
1131		if (slot->device == (hp_slot + ctrl->slot_device_offset))
1132			continue;
1133		if (get_presence_status(ctrl, slot) == 0)
 
 
1134			continue;
1135		/* If another adapter is running on the same segment but at a
1136		 * lower speed/mode, we allow the new adapter to function at
1137		 * this rate if supported
1138		 */
1139		if (bus->cur_bus_speed < adapter_speed)
1140			return 0;
1141
1142		return 1;
1143	}
1144
1145	/* If the controller doesn't support freq/mode changes and the
1146	 * controller is running at a higher mode, we bail
1147	 */
1148	if ((bus->cur_bus_speed > adapter_speed) && (!ctrl->pcix_speed_capability))
1149		return 1;
1150
1151	/* But we allow the adapter to run at a lower rate if possible */
1152	if ((bus->cur_bus_speed < adapter_speed) && (!ctrl->pcix_speed_capability))
1153		return 0;
1154
1155	/* We try to set the max speed supported by both the adapter and
1156	 * controller
1157	 */
1158	if (bus->max_bus_speed < adapter_speed) {
1159		if (bus->cur_bus_speed == bus->max_bus_speed)
1160			return 0;
1161		adapter_speed = bus->max_bus_speed;
1162	}
1163
1164	writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
1165	writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
1166
1167	set_SOGO(ctrl);
1168	wait_for_ctrl_irq(ctrl);
1169
1170	if (adapter_speed != PCI_SPEED_133MHz_PCIX)
1171		reg = 0xF5;
1172	else
1173		reg = 0xF4;
1174	pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1175
1176	reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
1177	reg16 &= ~0x000F;
1178	switch (adapter_speed) {
1179		case(PCI_SPEED_133MHz_PCIX):
1180			reg = 0x75;
1181			reg16 |= 0xB;
1182			break;
1183		case(PCI_SPEED_100MHz_PCIX):
1184			reg = 0x74;
1185			reg16 |= 0xA;
1186			break;
1187		case(PCI_SPEED_66MHz_PCIX):
1188			reg = 0x73;
1189			reg16 |= 0x9;
1190			break;
1191		case(PCI_SPEED_66MHz):
1192			reg = 0x73;
1193			reg16 |= 0x1;
1194			break;
1195		default: /* 33MHz PCI 2.2 */
1196			reg = 0x71;
1197			break;
1198
1199	}
1200	reg16 |= 0xB << 12;
1201	writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
1202
1203	mdelay(5);
1204
1205	/* Reenable interrupts */
1206	writel(0, ctrl->hpc_reg + INT_MASK);
1207
1208	pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1209
1210	/* Restart state machine */
1211	reg = ~0xF;
1212	pci_read_config_byte(ctrl->pci_dev, 0x43, &reg);
1213	pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
1214
1215	/* Only if mode change...*/
1216	if (((bus->cur_bus_speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
1217		((bus->cur_bus_speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz)))
1218			set_SOGO(ctrl);
1219
1220	wait_for_ctrl_irq(ctrl);
1221	mdelay(1100);
1222
1223	/* Restore LED/Slot state */
1224	writel(leds, ctrl->hpc_reg + LED_CONTROL);
1225	writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
1226
1227	set_SOGO(ctrl);
1228	wait_for_ctrl_irq(ctrl);
1229
1230	bus->cur_bus_speed = adapter_speed;
1231	slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1232
1233	info("Successfully changed frequency/mode for adapter in slot %d\n",
1234			slot->number);
1235	return 0;
1236}
1237
1238/* the following routines constitute the bulk of the
1239 * hotplug controller logic
1240 */
1241
1242
1243/**
1244 * board_replaced - Called after a board has been replaced in the system.
1245 * @func: PCI device/function information
1246 * @ctrl: hotplug controller
1247 *
1248 * This is only used if we don't have resources for hot add.
1249 * Turns power on for the board.
1250 * Checks to see if board is the same.
1251 * If board is same, reconfigures it.
1252 * If board isn't same, turns it back off.
1253 */
1254static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
1255{
1256	struct pci_bus *bus = ctrl->pci_bus;
1257	u8 hp_slot;
1258	u8 temp_byte;
1259	u8 adapter_speed;
1260	u32 rc = 0;
1261
1262	hp_slot = func->device - ctrl->slot_device_offset;
1263
1264	/*
1265	 * The switch is open.
1266	 */
1267	if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot))
1268		rc = INTERLOCK_OPEN;
1269	/*
1270	 * The board is already on
1271	 */
1272	else if (is_slot_enabled(ctrl, hp_slot))
1273		rc = CARD_FUNCTIONING;
1274	else {
1275		mutex_lock(&ctrl->crit_sect);
1276
1277		/* turn on board without attaching to the bus */
1278		enable_slot_power(ctrl, hp_slot);
1279
1280		set_SOGO(ctrl);
1281
1282		/* Wait for SOBS to be unset */
1283		wait_for_ctrl_irq(ctrl);
1284
1285		/* Change bits in slot power register to force another shift out
1286		 * NOTE: this is to work around the timer bug */
1287		temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1288		writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1289		writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1290
1291		set_SOGO(ctrl);
1292
1293		/* Wait for SOBS to be unset */
1294		wait_for_ctrl_irq(ctrl);
1295
1296		adapter_speed = get_adapter_speed(ctrl, hp_slot);
1297		if (bus->cur_bus_speed != adapter_speed)
1298			if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1299				rc = WRONG_BUS_FREQUENCY;
1300
1301		/* turn off board without attaching to the bus */
1302		disable_slot_power(ctrl, hp_slot);
1303
1304		set_SOGO(ctrl);
1305
1306		/* Wait for SOBS to be unset */
1307		wait_for_ctrl_irq(ctrl);
1308
1309		mutex_unlock(&ctrl->crit_sect);
1310
1311		if (rc)
1312			return rc;
1313
1314		mutex_lock(&ctrl->crit_sect);
1315
1316		slot_enable(ctrl, hp_slot);
1317		green_LED_blink(ctrl, hp_slot);
1318
1319		amber_LED_off(ctrl, hp_slot);
1320
1321		set_SOGO(ctrl);
1322
1323		/* Wait for SOBS to be unset */
1324		wait_for_ctrl_irq(ctrl);
1325
1326		mutex_unlock(&ctrl->crit_sect);
1327
1328		/* Wait for ~1 second because of hot plug spec */
1329		long_delay(1*HZ);
1330
1331		/* Check for a power fault */
1332		if (func->status == 0xFF) {
1333			/* power fault occurred, but it was benign */
1334			rc = POWER_FAILURE;
1335			func->status = 0;
1336		} else
1337			rc = cpqhp_valid_replace(ctrl, func);
1338
1339		if (!rc) {
1340			/* It must be the same board */
1341
1342			rc = cpqhp_configure_board(ctrl, func);
1343
1344			/* If configuration fails, turn it off
1345			 * Get slot won't work for devices behind
1346			 * bridges, but in this case it will always be
1347			 * called for the "base" bus/dev/func of an
1348			 * adapter.
1349			 */
1350
1351			mutex_lock(&ctrl->crit_sect);
1352
1353			amber_LED_on(ctrl, hp_slot);
1354			green_LED_off(ctrl, hp_slot);
1355			slot_disable(ctrl, hp_slot);
1356
1357			set_SOGO(ctrl);
1358
1359			/* Wait for SOBS to be unset */
1360			wait_for_ctrl_irq(ctrl);
1361
1362			mutex_unlock(&ctrl->crit_sect);
1363
1364			if (rc)
1365				return rc;
1366			else
1367				return 1;
1368
1369		} else {
1370			/* Something is wrong
1371
1372			 * Get slot won't work for devices behind bridges, but
1373			 * in this case it will always be called for the "base"
1374			 * bus/dev/func of an adapter.
1375			 */
1376
1377			mutex_lock(&ctrl->crit_sect);
1378
1379			amber_LED_on(ctrl, hp_slot);
1380			green_LED_off(ctrl, hp_slot);
1381			slot_disable(ctrl, hp_slot);
1382
1383			set_SOGO(ctrl);
1384
1385			/* Wait for SOBS to be unset */
1386			wait_for_ctrl_irq(ctrl);
1387
1388			mutex_unlock(&ctrl->crit_sect);
1389		}
1390
1391	}
1392	return rc;
1393
1394}
1395
1396
1397/**
1398 * board_added - Called after a board has been added to the system.
1399 * @func: PCI device/function info
1400 * @ctrl: hotplug controller
1401 *
1402 * Turns power on for the board.
1403 * Configures board.
1404 */
1405static u32 board_added(struct pci_func *func, struct controller *ctrl)
1406{
1407	u8 hp_slot;
1408	u8 temp_byte;
1409	u8 adapter_speed;
1410	int index;
1411	u32 temp_register = 0xFFFFFFFF;
1412	u32 rc = 0;
1413	struct pci_func *new_slot = NULL;
1414	struct pci_bus *bus = ctrl->pci_bus;
1415	struct slot *p_slot;
1416	struct resource_lists res_lists;
1417
1418	hp_slot = func->device - ctrl->slot_device_offset;
1419	dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
1420	    __func__, func->device, ctrl->slot_device_offset, hp_slot);
1421
1422	mutex_lock(&ctrl->crit_sect);
1423
1424	/* turn on board without attaching to the bus */
1425	enable_slot_power(ctrl, hp_slot);
1426
1427	set_SOGO(ctrl);
1428
1429	/* Wait for SOBS to be unset */
1430	wait_for_ctrl_irq(ctrl);
1431
1432	/* Change bits in slot power register to force another shift out
1433	 * NOTE: this is to work around the timer bug
1434	 */
1435	temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1436	writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1437	writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1438
1439	set_SOGO(ctrl);
1440
1441	/* Wait for SOBS to be unset */
1442	wait_for_ctrl_irq(ctrl);
1443
1444	adapter_speed = get_adapter_speed(ctrl, hp_slot);
1445	if (bus->cur_bus_speed != adapter_speed)
1446		if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1447			rc = WRONG_BUS_FREQUENCY;
1448
1449	/* turn off board without attaching to the bus */
1450	disable_slot_power(ctrl, hp_slot);
1451
1452	set_SOGO(ctrl);
1453
1454	/* Wait for SOBS to be unset */
1455	wait_for_ctrl_irq(ctrl);
1456
1457	mutex_unlock(&ctrl->crit_sect);
1458
1459	if (rc)
1460		return rc;
1461
1462	p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1463
1464	/* turn on board and blink green LED */
1465
1466	dbg("%s: before down\n", __func__);
1467	mutex_lock(&ctrl->crit_sect);
1468	dbg("%s: after down\n", __func__);
1469
1470	dbg("%s: before slot_enable\n", __func__);
1471	slot_enable(ctrl, hp_slot);
1472
1473	dbg("%s: before green_LED_blink\n", __func__);
1474	green_LED_blink(ctrl, hp_slot);
1475
1476	dbg("%s: before amber_LED_blink\n", __func__);
1477	amber_LED_off(ctrl, hp_slot);
1478
1479	dbg("%s: before set_SOGO\n", __func__);
1480	set_SOGO(ctrl);
1481
1482	/* Wait for SOBS to be unset */
1483	dbg("%s: before wait_for_ctrl_irq\n", __func__);
1484	wait_for_ctrl_irq(ctrl);
1485	dbg("%s: after wait_for_ctrl_irq\n", __func__);
1486
1487	dbg("%s: before up\n", __func__);
1488	mutex_unlock(&ctrl->crit_sect);
1489	dbg("%s: after up\n", __func__);
1490
1491	/* Wait for ~1 second because of hot plug spec */
1492	dbg("%s: before long_delay\n", __func__);
1493	long_delay(1*HZ);
1494	dbg("%s: after long_delay\n", __func__);
1495
1496	dbg("%s: func status = %x\n", __func__, func->status);
1497	/* Check for a power fault */
1498	if (func->status == 0xFF) {
1499		/* power fault occurred, but it was benign */
1500		temp_register = 0xFFFFFFFF;
1501		dbg("%s: temp register set to %x by power fault\n", __func__, temp_register);
1502		rc = POWER_FAILURE;
1503		func->status = 0;
1504	} else {
1505		/* Get vendor/device ID u32 */
1506		ctrl->pci_bus->number = func->bus;
1507		rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
1508		dbg("%s: pci_read_config_dword returns %d\n", __func__, rc);
1509		dbg("%s: temp_register is %x\n", __func__, temp_register);
1510
1511		if (rc != 0) {
1512			/* Something's wrong here */
1513			temp_register = 0xFFFFFFFF;
1514			dbg("%s: temp register set to %x by error\n", __func__, temp_register);
1515		}
1516		/* Preset return code.  It will be changed later if things go okay. */
1517		rc = NO_ADAPTER_PRESENT;
1518	}
1519
1520	/* All F's is an empty slot or an invalid board */
1521	if (temp_register != 0xFFFFFFFF) {
1522		res_lists.io_head = ctrl->io_head;
1523		res_lists.mem_head = ctrl->mem_head;
1524		res_lists.p_mem_head = ctrl->p_mem_head;
1525		res_lists.bus_head = ctrl->bus_head;
1526		res_lists.irqs = NULL;
1527
1528		rc = configure_new_device(ctrl, func, 0, &res_lists);
1529
1530		dbg("%s: back from configure_new_device\n", __func__);
1531		ctrl->io_head = res_lists.io_head;
1532		ctrl->mem_head = res_lists.mem_head;
1533		ctrl->p_mem_head = res_lists.p_mem_head;
1534		ctrl->bus_head = res_lists.bus_head;
1535
1536		cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1537		cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1538		cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1539		cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1540
1541		if (rc) {
1542			mutex_lock(&ctrl->crit_sect);
1543
1544			amber_LED_on(ctrl, hp_slot);
1545			green_LED_off(ctrl, hp_slot);
1546			slot_disable(ctrl, hp_slot);
1547
1548			set_SOGO(ctrl);
1549
1550			/* Wait for SOBS to be unset */
1551			wait_for_ctrl_irq(ctrl);
1552
1553			mutex_unlock(&ctrl->crit_sect);
1554			return rc;
1555		} else {
1556			cpqhp_save_slot_config(ctrl, func);
1557		}
1558
1559
1560		func->status = 0;
1561		func->switch_save = 0x10;
1562		func->is_a_board = 0x01;
1563
1564		/* next, we will instantiate the linux pci_dev structures (with
1565		 * appropriate driver notification, if already present) */
1566		dbg("%s: configure linux pci_dev structure\n", __func__);
1567		index = 0;
1568		do {
1569			new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
1570			if (new_slot && !new_slot->pci_dev)
1571				cpqhp_configure_device(ctrl, new_slot);
1572		} while (new_slot);
1573
1574		mutex_lock(&ctrl->crit_sect);
1575
1576		green_LED_on(ctrl, hp_slot);
1577
1578		set_SOGO(ctrl);
1579
1580		/* Wait for SOBS to be unset */
1581		wait_for_ctrl_irq(ctrl);
1582
1583		mutex_unlock(&ctrl->crit_sect);
1584	} else {
1585		mutex_lock(&ctrl->crit_sect);
1586
1587		amber_LED_on(ctrl, hp_slot);
1588		green_LED_off(ctrl, hp_slot);
1589		slot_disable(ctrl, hp_slot);
1590
1591		set_SOGO(ctrl);
1592
1593		/* Wait for SOBS to be unset */
1594		wait_for_ctrl_irq(ctrl);
1595
1596		mutex_unlock(&ctrl->crit_sect);
1597
1598		return rc;
1599	}
1600	return 0;
1601}
1602
1603
1604/**
1605 * remove_board - Turns off slot and LEDs
1606 * @func: PCI device/function info
1607 * @replace_flag: whether replacing or adding a new device
1608 * @ctrl: target controller
1609 */
1610static u32 remove_board(struct pci_func *func, u32 replace_flag, struct controller *ctrl)
1611{
1612	int index;
1613	u8 skip = 0;
1614	u8 device;
1615	u8 hp_slot;
1616	u8 temp_byte;
1617	u32 rc;
1618	struct resource_lists res_lists;
1619	struct pci_func *temp_func;
1620
1621	if (cpqhp_unconfigure_device(func))
1622		return 1;
1623
1624	device = func->device;
1625
1626	hp_slot = func->device - ctrl->slot_device_offset;
1627	dbg("In %s, hp_slot = %d\n", __func__, hp_slot);
1628
1629	/* When we get here, it is safe to change base address registers.
1630	 * We will attempt to save the base address register lengths */
1631	if (replace_flag || !ctrl->add_support)
1632		rc = cpqhp_save_base_addr_length(ctrl, func);
1633	else if (!func->bus_head && !func->mem_head &&
1634		 !func->p_mem_head && !func->io_head) {
1635		/* Here we check to see if we've saved any of the board's
1636		 * resources already.  If so, we'll skip the attempt to
1637		 * determine what's being used. */
1638		index = 0;
1639		temp_func = cpqhp_slot_find(func->bus, func->device, index++);
1640		while (temp_func) {
1641			if (temp_func->bus_head || temp_func->mem_head
1642			    || temp_func->p_mem_head || temp_func->io_head) {
1643				skip = 1;
1644				break;
1645			}
1646			temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
1647		}
1648
1649		if (!skip)
1650			rc = cpqhp_save_used_resources(ctrl, func);
1651	}
1652	/* Change status to shutdown */
1653	if (func->is_a_board)
1654		func->status = 0x01;
1655	func->configured = 0;
1656
1657	mutex_lock(&ctrl->crit_sect);
1658
1659	green_LED_off(ctrl, hp_slot);
1660	slot_disable(ctrl, hp_slot);
1661
1662	set_SOGO(ctrl);
1663
1664	/* turn off SERR for slot */
1665	temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
1666	temp_byte &= ~(0x01 << hp_slot);
1667	writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
1668
1669	/* Wait for SOBS to be unset */
1670	wait_for_ctrl_irq(ctrl);
1671
1672	mutex_unlock(&ctrl->crit_sect);
1673
1674	if (!replace_flag && ctrl->add_support) {
1675		while (func) {
1676			res_lists.io_head = ctrl->io_head;
1677			res_lists.mem_head = ctrl->mem_head;
1678			res_lists.p_mem_head = ctrl->p_mem_head;
1679			res_lists.bus_head = ctrl->bus_head;
1680
1681			cpqhp_return_board_resources(func, &res_lists);
1682
1683			ctrl->io_head = res_lists.io_head;
1684			ctrl->mem_head = res_lists.mem_head;
1685			ctrl->p_mem_head = res_lists.p_mem_head;
1686			ctrl->bus_head = res_lists.bus_head;
1687
1688			cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1689			cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1690			cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1691			cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1692
1693			if (is_bridge(func)) {
1694				bridge_slot_remove(func);
1695			} else
1696				slot_remove(func);
1697
1698			func = cpqhp_slot_find(ctrl->bus, device, 0);
1699		}
1700
1701		/* Setup slot structure with entry for empty slot */
1702		func = cpqhp_slot_create(ctrl->bus);
1703
1704		if (func == NULL)
1705			return 1;
1706
1707		func->bus = ctrl->bus;
1708		func->device = device;
1709		func->function = 0;
1710		func->configured = 0;
1711		func->switch_save = 0x10;
1712		func->is_a_board = 0;
1713		func->p_task_event = NULL;
1714	}
1715
1716	return 0;
1717}
1718
1719static void pushbutton_helper_thread(struct timer_list *t)
1720{
1721	pushbutton_pending = t;
1722
1723	wake_up_process(cpqhp_event_thread);
1724}
1725
1726
1727/* this is the main worker thread */
1728static int event_thread(void *data)
1729{
1730	struct controller *ctrl;
1731
1732	while (1) {
1733		dbg("!!!!event_thread sleeping\n");
1734		set_current_state(TASK_INTERRUPTIBLE);
1735		schedule();
1736
1737		if (kthread_should_stop())
1738			break;
1739		/* Do stuff here */
1740		if (pushbutton_pending)
1741			cpqhp_pushbutton_thread(pushbutton_pending);
1742		else
1743			for (ctrl = cpqhp_ctrl_list; ctrl; ctrl = ctrl->next)
1744				interrupt_event_handler(ctrl);
1745	}
1746	dbg("event_thread signals exit\n");
1747	return 0;
1748}
1749
1750int cpqhp_event_start_thread(void)
1751{
1752	cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event");
1753	if (IS_ERR(cpqhp_event_thread)) {
1754		err("Can't start up our event thread\n");
1755		return PTR_ERR(cpqhp_event_thread);
1756	}
1757
1758	return 0;
1759}
1760
1761
1762void cpqhp_event_stop_thread(void)
1763{
1764	kthread_stop(cpqhp_event_thread);
1765}
1766
1767
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1768static void interrupt_event_handler(struct controller *ctrl)
1769{
1770	int loop = 0;
1771	int change = 1;
1772	struct pci_func *func;
1773	u8 hp_slot;
1774	struct slot *p_slot;
1775
1776	while (change) {
1777		change = 0;
1778
1779		for (loop = 0; loop < 10; loop++) {
1780			/* dbg("loop %d\n", loop); */
1781			if (ctrl->event_queue[loop].event_type != 0) {
1782				hp_slot = ctrl->event_queue[loop].hp_slot;
1783
1784				func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
1785				if (!func)
1786					return;
1787
1788				p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1789				if (!p_slot)
1790					return;
1791
1792				dbg("hp_slot %d, func %p, p_slot %p\n",
1793				    hp_slot, func, p_slot);
1794
1795				if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1796					dbg("button pressed\n");
1797				} else if (ctrl->event_queue[loop].event_type ==
1798					   INT_BUTTON_CANCEL) {
1799					dbg("button cancel\n");
1800					del_timer(&p_slot->task_event);
1801
1802					mutex_lock(&ctrl->crit_sect);
1803
1804					if (p_slot->state == BLINKINGOFF_STATE) {
1805						/* slot is on */
1806						dbg("turn on green LED\n");
1807						green_LED_on(ctrl, hp_slot);
1808					} else if (p_slot->state == BLINKINGON_STATE) {
1809						/* slot is off */
1810						dbg("turn off green LED\n");
1811						green_LED_off(ctrl, hp_slot);
1812					}
1813
1814					info(msg_button_cancel, p_slot->number);
1815
1816					p_slot->state = STATIC_STATE;
1817
1818					amber_LED_off(ctrl, hp_slot);
1819
1820					set_SOGO(ctrl);
1821
1822					/* Wait for SOBS to be unset */
1823					wait_for_ctrl_irq(ctrl);
1824
1825					mutex_unlock(&ctrl->crit_sect);
1826				}
1827				/*** button Released (No action on press...) */
1828				else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
1829					dbg("button release\n");
1830
1831					if (is_slot_enabled(ctrl, hp_slot)) {
1832						dbg("slot is on\n");
1833						p_slot->state = BLINKINGOFF_STATE;
1834						info(msg_button_off, p_slot->number);
1835					} else {
1836						dbg("slot is off\n");
1837						p_slot->state = BLINKINGON_STATE;
1838						info(msg_button_on, p_slot->number);
1839					}
1840					mutex_lock(&ctrl->crit_sect);
1841
1842					dbg("blink green LED and turn off amber\n");
1843
1844					amber_LED_off(ctrl, hp_slot);
1845					green_LED_blink(ctrl, hp_slot);
1846
1847					set_SOGO(ctrl);
1848
1849					/* Wait for SOBS to be unset */
1850					wait_for_ctrl_irq(ctrl);
1851
1852					mutex_unlock(&ctrl->crit_sect);
1853					timer_setup(&p_slot->task_event,
1854						    pushbutton_helper_thread,
1855						    0);
1856					p_slot->hp_slot = hp_slot;
1857					p_slot->ctrl = ctrl;
1858/*					p_slot->physical_slot = physical_slot; */
1859					p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
 
 
1860
1861					dbg("add_timer p_slot = %p\n", p_slot);
1862					add_timer(&p_slot->task_event);
1863				}
1864				/***********POWER FAULT */
1865				else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
1866					dbg("power fault\n");
 
 
 
1867				}
1868
1869				ctrl->event_queue[loop].event_type = 0;
1870
1871				change = 1;
1872			}
1873		}		/* End of FOR loop */
1874	}
 
 
1875}
1876
1877
1878/**
1879 * cpqhp_pushbutton_thread - handle pushbutton events
1880 * @slot: target slot (struct)
1881 *
1882 * Scheduled procedure to handle blocking stuff for the pushbuttons.
1883 * Handles all pending events and exits.
1884 */
1885void cpqhp_pushbutton_thread(struct timer_list *t)
1886{
1887	u8 hp_slot;
1888	u8 device;
1889	struct pci_func *func;
1890	struct slot *p_slot = from_timer(p_slot, t, task_event);
1891	struct controller *ctrl = (struct controller *) p_slot->ctrl;
1892
1893	pushbutton_pending = NULL;
1894	hp_slot = p_slot->hp_slot;
1895
1896	device = p_slot->device;
1897
1898	if (is_slot_enabled(ctrl, hp_slot)) {
1899		p_slot->state = POWEROFF_STATE;
1900		/* power Down board */
1901		func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1902		dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
1903		if (!func) {
1904			dbg("Error! func NULL in %s\n", __func__);
1905			return;
1906		}
1907
1908		if (cpqhp_process_SS(ctrl, func) != 0) {
1909			amber_LED_on(ctrl, hp_slot);
1910			green_LED_on(ctrl, hp_slot);
1911
1912			set_SOGO(ctrl);
1913
1914			/* Wait for SOBS to be unset */
1915			wait_for_ctrl_irq(ctrl);
1916		}
1917
1918		p_slot->state = STATIC_STATE;
1919	} else {
1920		p_slot->state = POWERON_STATE;
1921		/* slot is off */
1922
1923		func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1924		dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
1925		if (!func) {
1926			dbg("Error! func NULL in %s\n", __func__);
1927			return;
1928		}
1929
1930		if (ctrl != NULL) {
1931			if (cpqhp_process_SI(ctrl, func) != 0) {
1932				amber_LED_on(ctrl, hp_slot);
1933				green_LED_off(ctrl, hp_slot);
1934
1935				set_SOGO(ctrl);
1936
1937				/* Wait for SOBS to be unset */
1938				wait_for_ctrl_irq(ctrl);
1939			}
1940		}
1941
1942		p_slot->state = STATIC_STATE;
1943	}
 
 
1944}
1945
1946
1947int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func)
1948{
1949	u8 device, hp_slot;
1950	u16 temp_word;
1951	u32 tempdword;
1952	int rc;
1953	struct slot *p_slot;
1954	int physical_slot = 0;
1955
1956	tempdword = 0;
1957
1958	device = func->device;
1959	hp_slot = device - ctrl->slot_device_offset;
1960	p_slot = cpqhp_find_slot(ctrl, device);
1961	if (p_slot)
1962		physical_slot = p_slot->number;
1963
1964	/* Check to see if the interlock is closed */
1965	tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1966
1967	if (tempdword & (0x01 << hp_slot))
1968		return 1;
1969
1970	if (func->is_a_board) {
1971		rc = board_replaced(func, ctrl);
1972	} else {
1973		/* add board */
1974		slot_remove(func);
1975
1976		func = cpqhp_slot_create(ctrl->bus);
1977		if (func == NULL)
1978			return 1;
1979
1980		func->bus = ctrl->bus;
1981		func->device = device;
1982		func->function = 0;
1983		func->configured = 0;
1984		func->is_a_board = 1;
1985
1986		/* We have to save the presence info for these slots */
1987		temp_word = ctrl->ctrl_int_comp >> 16;
1988		func->presence_save = (temp_word >> hp_slot) & 0x01;
1989		func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1990
1991		if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1992			func->switch_save = 0;
1993		} else {
1994			func->switch_save = 0x10;
1995		}
1996
1997		rc = board_added(func, ctrl);
1998		if (rc) {
1999			if (is_bridge(func)) {
2000				bridge_slot_remove(func);
2001			} else
2002				slot_remove(func);
2003
2004			/* Setup slot structure with entry for empty slot */
2005			func = cpqhp_slot_create(ctrl->bus);
2006
2007			if (func == NULL)
2008				return 1;
2009
2010			func->bus = ctrl->bus;
2011			func->device = device;
2012			func->function = 0;
2013			func->configured = 0;
2014			func->is_a_board = 0;
2015
2016			/* We have to save the presence info for these slots */
2017			temp_word = ctrl->ctrl_int_comp >> 16;
2018			func->presence_save = (temp_word >> hp_slot) & 0x01;
2019			func->presence_save |=
2020			(temp_word >> (hp_slot + 7)) & 0x02;
2021
2022			if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2023				func->switch_save = 0;
2024			} else {
2025				func->switch_save = 0x10;
2026			}
2027		}
2028	}
2029
2030	if (rc)
2031		dbg("%s: rc = %d\n", __func__, rc);
2032
 
 
 
2033	return rc;
2034}
2035
2036
2037int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func)
2038{
2039	u8 device, class_code, header_type, BCR;
2040	u8 index = 0;
2041	u8 replace_flag;
2042	u32 rc = 0;
2043	unsigned int devfn;
2044	struct slot *p_slot;
2045	struct pci_bus *pci_bus = ctrl->pci_bus;
2046	int physical_slot = 0;
2047
2048	device = func->device;
2049	func = cpqhp_slot_find(ctrl->bus, device, index++);
2050	p_slot = cpqhp_find_slot(ctrl, device);
2051	if (p_slot)
2052		physical_slot = p_slot->number;
2053
2054	/* Make sure there are no video controllers here */
2055	while (func && !rc) {
2056		pci_bus->number = func->bus;
2057		devfn = PCI_DEVFN(func->device, func->function);
2058
2059		/* Check the Class Code */
2060		rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
2061		if (rc)
2062			return rc;
2063
2064		if (class_code == PCI_BASE_CLASS_DISPLAY) {
2065			/* Display/Video adapter (not supported) */
2066			rc = REMOVE_NOT_SUPPORTED;
2067		} else {
2068			/* See if it's a bridge */
2069			rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
2070			if (rc)
2071				return rc;
2072
2073			/* If it's a bridge, check the VGA Enable bit */
2074			if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2075				rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
2076				if (rc)
2077					return rc;
2078
2079				/* If the VGA Enable bit is set, remove isn't
2080				 * supported */
2081				if (BCR & PCI_BRIDGE_CTL_VGA)
2082					rc = REMOVE_NOT_SUPPORTED;
2083			}
2084		}
2085
2086		func = cpqhp_slot_find(ctrl->bus, device, index++);
2087	}
2088
2089	func = cpqhp_slot_find(ctrl->bus, device, 0);
2090	if ((func != NULL) && !rc) {
2091		/* FIXME: Replace flag should be passed into process_SS */
2092		replace_flag = !(ctrl->add_support);
2093		rc = remove_board(func, replace_flag, ctrl);
2094	} else if (!rc) {
2095		rc = 1;
2096	}
2097
 
 
 
2098	return rc;
2099}
2100
2101/**
2102 * switch_leds - switch the leds, go from one site to the other.
2103 * @ctrl: controller to use
2104 * @num_of_slots: number of slots to use
2105 * @work_LED: LED control value
2106 * @direction: 1 to start from the left side, 0 to start right.
2107 */
2108static void switch_leds(struct controller *ctrl, const int num_of_slots,
2109			u32 *work_LED, const int direction)
2110{
2111	int loop;
2112
2113	for (loop = 0; loop < num_of_slots; loop++) {
2114		if (direction)
2115			*work_LED = *work_LED >> 1;
2116		else
2117			*work_LED = *work_LED << 1;
2118		writel(*work_LED, ctrl->hpc_reg + LED_CONTROL);
2119
2120		set_SOGO(ctrl);
2121
2122		/* Wait for SOGO interrupt */
2123		wait_for_ctrl_irq(ctrl);
2124
2125		/* Get ready for next iteration */
2126		long_delay((2*HZ)/10);
2127	}
2128}
2129
2130/**
2131 * cpqhp_hardware_test - runs hardware tests
2132 * @ctrl: target controller
2133 * @test_num: the number written to the "test" file in sysfs.
2134 *
2135 * For hot plug ctrl folks to play with.
2136 */
2137int cpqhp_hardware_test(struct controller *ctrl, int test_num)
2138{
2139	u32 save_LED;
2140	u32 work_LED;
2141	int loop;
2142	int num_of_slots;
2143
2144	num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
2145
2146	switch (test_num) {
2147	case 1:
2148		/* Do stuff here! */
2149
2150		/* Do that funky LED thing */
2151		/* so we can restore them later */
2152		save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
2153		work_LED = 0x01010101;
2154		switch_leds(ctrl, num_of_slots, &work_LED, 0);
2155		switch_leds(ctrl, num_of_slots, &work_LED, 1);
2156		switch_leds(ctrl, num_of_slots, &work_LED, 0);
2157		switch_leds(ctrl, num_of_slots, &work_LED, 1);
2158
2159		work_LED = 0x01010000;
2160		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2161		switch_leds(ctrl, num_of_slots, &work_LED, 0);
2162		switch_leds(ctrl, num_of_slots, &work_LED, 1);
2163		work_LED = 0x00000101;
2164		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2165		switch_leds(ctrl, num_of_slots, &work_LED, 0);
2166		switch_leds(ctrl, num_of_slots, &work_LED, 1);
2167
2168		work_LED = 0x01010000;
2169		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2170		for (loop = 0; loop < num_of_slots; loop++) {
2171			set_SOGO(ctrl);
2172
2173			/* Wait for SOGO interrupt */
2174			wait_for_ctrl_irq(ctrl);
2175
2176			/* Get ready for next iteration */
2177			long_delay((3*HZ)/10);
2178			work_LED = work_LED >> 16;
2179			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2180
2181			set_SOGO(ctrl);
2182
2183			/* Wait for SOGO interrupt */
2184			wait_for_ctrl_irq(ctrl);
2185
2186			/* Get ready for next iteration */
2187			long_delay((3*HZ)/10);
2188			work_LED = work_LED << 16;
2189			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2190			work_LED = work_LED << 1;
2191			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2192		}
2193
2194		/* put it back the way it was */
2195		writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
2196
2197		set_SOGO(ctrl);
2198
2199		/* Wait for SOBS to be unset */
2200		wait_for_ctrl_irq(ctrl);
2201		break;
2202	case 2:
2203		/* Do other stuff here! */
2204		break;
2205	case 3:
2206		/* and more... */
2207		break;
2208	}
2209	return 0;
2210}
2211
2212
2213/**
2214 * configure_new_device - Configures the PCI header information of one board.
2215 * @ctrl: pointer to controller structure
2216 * @func: pointer to function structure
2217 * @behind_bridge: 1 if this is a recursive call, 0 if not
2218 * @resources: pointer to set of resource lists
2219 *
2220 * Returns 0 if success.
2221 */
2222static u32 configure_new_device(struct controller  *ctrl, struct pci_func  *func,
2223				 u8 behind_bridge, struct resource_lists  *resources)
2224{
2225	u8 temp_byte, function, max_functions, stop_it;
2226	int rc;
2227	u32 ID;
2228	struct pci_func *new_slot;
2229	int index;
2230
2231	new_slot = func;
2232
2233	dbg("%s\n", __func__);
2234	/* Check for Multi-function device */
2235	ctrl->pci_bus->number = func->bus;
2236	rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2237	if (rc) {
2238		dbg("%s: rc = %d\n", __func__, rc);
2239		return rc;
2240	}
2241
2242	if (temp_byte & 0x80)	/* Multi-function device */
2243		max_functions = 8;
2244	else
2245		max_functions = 1;
2246
2247	function = 0;
2248
2249	do {
2250		rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
2251
2252		if (rc) {
2253			dbg("configure_new_function failed %d\n", rc);
2254			index = 0;
2255
2256			while (new_slot) {
2257				new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
2258
2259				if (new_slot)
2260					cpqhp_return_board_resources(new_slot, resources);
2261			}
2262
2263			return rc;
2264		}
2265
2266		function++;
2267
2268		stop_it = 0;
2269
2270		/* The following loop skips to the next present function
2271		 * and creates a board structure */
2272
2273		while ((function < max_functions) && (!stop_it)) {
2274			pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2275
2276			if (ID == 0xFFFFFFFF) {
2277				function++;
2278			} else {
2279				/* Setup slot structure. */
2280				new_slot = cpqhp_slot_create(func->bus);
2281
2282				if (new_slot == NULL)
2283					return 1;
2284
2285				new_slot->bus = func->bus;
2286				new_slot->device = func->device;
2287				new_slot->function = function;
2288				new_slot->is_a_board = 1;
2289				new_slot->status = 0;
2290
2291				stop_it++;
2292			}
2293		}
2294
2295	} while (function < max_functions);
2296	dbg("returning from configure_new_device\n");
2297
2298	return 0;
2299}
2300
2301
2302/*
2303 * Configuration logic that involves the hotplug data structures and
2304 * their bookkeeping
2305 */
2306
2307
2308/**
2309 * configure_new_function - Configures the PCI header information of one device
2310 * @ctrl: pointer to controller structure
2311 * @func: pointer to function structure
2312 * @behind_bridge: 1 if this is a recursive call, 0 if not
2313 * @resources: pointer to set of resource lists
2314 *
2315 * Calls itself recursively for bridged devices.
2316 * Returns 0 if success.
2317 */
2318static int configure_new_function(struct controller *ctrl, struct pci_func *func,
2319				   u8 behind_bridge,
2320				   struct resource_lists *resources)
2321{
2322	int cloop;
2323	u8 IRQ = 0;
2324	u8 temp_byte;
2325	u8 device;
2326	u8 class_code;
2327	u16 command;
2328	u16 temp_word;
2329	u32 temp_dword;
2330	u32 rc;
2331	u32 temp_register;
2332	u32 base;
2333	u32 ID;
2334	unsigned int devfn;
2335	struct pci_resource *mem_node;
2336	struct pci_resource *p_mem_node;
2337	struct pci_resource *io_node;
2338	struct pci_resource *bus_node;
2339	struct pci_resource *hold_mem_node;
2340	struct pci_resource *hold_p_mem_node;
2341	struct pci_resource *hold_IO_node;
2342	struct pci_resource *hold_bus_node;
2343	struct irq_mapping irqs;
2344	struct pci_func *new_slot;
2345	struct pci_bus *pci_bus;
2346	struct resource_lists temp_resources;
2347
2348	pci_bus = ctrl->pci_bus;
2349	pci_bus->number = func->bus;
2350	devfn = PCI_DEVFN(func->device, func->function);
2351
2352	/* Check for Bridge */
2353	rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2354	if (rc)
2355		return rc;
2356
2357	if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2358		/* set Primary bus */
2359		dbg("set Primary bus = %d\n", func->bus);
2360		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2361		if (rc)
2362			return rc;
2363
2364		/* find range of buses to use */
2365		dbg("find ranges of buses to use\n");
2366		bus_node = get_max_resource(&(resources->bus_head), 1);
2367
2368		/* If we don't have any buses to allocate, we can't continue */
2369		if (!bus_node)
2370			return -ENOMEM;
2371
2372		/* set Secondary bus */
2373		temp_byte = bus_node->base;
2374		dbg("set Secondary bus = %d\n", bus_node->base);
2375		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2376		if (rc)
2377			return rc;
2378
2379		/* set subordinate bus */
2380		temp_byte = bus_node->base + bus_node->length - 1;
2381		dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
2382		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2383		if (rc)
2384			return rc;
2385
2386		/* set subordinate Latency Timer and base Latency Timer */
2387		temp_byte = 0x40;
2388		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
2389		if (rc)
2390			return rc;
2391		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
2392		if (rc)
2393			return rc;
2394
2395		/* set Cache Line size */
2396		temp_byte = 0x08;
2397		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
2398		if (rc)
2399			return rc;
2400
2401		/* Setup the IO, memory, and prefetchable windows */
2402		io_node = get_max_resource(&(resources->io_head), 0x1000);
2403		if (!io_node)
2404			return -ENOMEM;
2405		mem_node = get_max_resource(&(resources->mem_head), 0x100000);
2406		if (!mem_node)
2407			return -ENOMEM;
2408		p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
2409		if (!p_mem_node)
2410			return -ENOMEM;
2411		dbg("Setup the IO, memory, and prefetchable windows\n");
2412		dbg("io_node\n");
2413		dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
2414					io_node->length, io_node->next);
2415		dbg("mem_node\n");
2416		dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
2417					mem_node->length, mem_node->next);
2418		dbg("p_mem_node\n");
2419		dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
2420					p_mem_node->length, p_mem_node->next);
2421
2422		/* set up the IRQ info */
2423		if (!resources->irqs) {
2424			irqs.barber_pole = 0;
2425			irqs.interrupt[0] = 0;
2426			irqs.interrupt[1] = 0;
2427			irqs.interrupt[2] = 0;
2428			irqs.interrupt[3] = 0;
2429			irqs.valid_INT = 0;
2430		} else {
2431			irqs.barber_pole = resources->irqs->barber_pole;
2432			irqs.interrupt[0] = resources->irqs->interrupt[0];
2433			irqs.interrupt[1] = resources->irqs->interrupt[1];
2434			irqs.interrupt[2] = resources->irqs->interrupt[2];
2435			irqs.interrupt[3] = resources->irqs->interrupt[3];
2436			irqs.valid_INT = resources->irqs->valid_INT;
2437		}
2438
2439		/* set up resource lists that are now aligned on top and bottom
2440		 * for anything behind the bridge. */
2441		temp_resources.bus_head = bus_node;
2442		temp_resources.io_head = io_node;
2443		temp_resources.mem_head = mem_node;
2444		temp_resources.p_mem_head = p_mem_node;
2445		temp_resources.irqs = &irqs;
2446
2447		/* Make copies of the nodes we are going to pass down so that
2448		 * if there is a problem,we can just use these to free resources
2449		 */
2450		hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
2451		hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
2452		hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
2453		hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
2454
2455		if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2456			kfree(hold_bus_node);
2457			kfree(hold_IO_node);
2458			kfree(hold_mem_node);
2459			kfree(hold_p_mem_node);
2460
2461			return 1;
2462		}
2463
2464		memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2465
2466		bus_node->base += 1;
2467		bus_node->length -= 1;
2468		bus_node->next = NULL;
2469
2470		/* If we have IO resources copy them and fill in the bridge's
2471		 * IO range registers */
2472		memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2473		io_node->next = NULL;
2474
2475		/* set IO base and Limit registers */
2476		temp_byte = io_node->base >> 8;
2477		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2478
2479		temp_byte = (io_node->base + io_node->length - 1) >> 8;
2480		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2481
2482		/* Copy the memory resources and fill in the bridge's memory
2483		 * range registers.
2484		 */
2485		memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2486		mem_node->next = NULL;
2487
2488		/* set Mem base and Limit registers */
2489		temp_word = mem_node->base >> 16;
2490		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2491
2492		temp_word = (mem_node->base + mem_node->length - 1) >> 16;
2493		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2494
2495		memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2496		p_mem_node->next = NULL;
2497
2498		/* set Pre Mem base and Limit registers */
2499		temp_word = p_mem_node->base >> 16;
2500		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2501
2502		temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
2503		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2504
2505		/* Adjust this to compensate for extra adjustment in first loop
2506		 */
2507		irqs.barber_pole--;
2508
2509		rc = 0;
2510
2511		/* Here we actually find the devices and configure them */
2512		for (device = 0; (device <= 0x1F) && !rc; device++) {
2513			irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2514
2515			ID = 0xFFFFFFFF;
2516			pci_bus->number = hold_bus_node->base;
2517			pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
2518			pci_bus->number = func->bus;
2519
2520			if (ID != 0xFFFFFFFF) {	  /*  device present */
2521				/* Setup slot structure. */
2522				new_slot = cpqhp_slot_create(hold_bus_node->base);
2523
2524				if (new_slot == NULL) {
2525					rc = -ENOMEM;
2526					continue;
2527				}
2528
2529				new_slot->bus = hold_bus_node->base;
2530				new_slot->device = device;
2531				new_slot->function = 0;
2532				new_slot->is_a_board = 1;
2533				new_slot->status = 0;
2534
2535				rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
2536				dbg("configure_new_device rc=0x%x\n", rc);
2537			}	/* End of IF (device in slot?) */
2538		}		/* End of FOR loop */
2539
2540		if (rc)
2541			goto free_and_out;
2542		/* save the interrupt routing information */
2543		if (resources->irqs) {
2544			resources->irqs->interrupt[0] = irqs.interrupt[0];
2545			resources->irqs->interrupt[1] = irqs.interrupt[1];
2546			resources->irqs->interrupt[2] = irqs.interrupt[2];
2547			resources->irqs->interrupt[3] = irqs.interrupt[3];
2548			resources->irqs->valid_INT = irqs.valid_INT;
2549		} else if (!behind_bridge) {
2550			/* We need to hook up the interrupts here */
2551			for (cloop = 0; cloop < 4; cloop++) {
2552				if (irqs.valid_INT & (0x01 << cloop)) {
2553					rc = cpqhp_set_irq(func->bus, func->device,
2554							   cloop + 1, irqs.interrupt[cloop]);
2555					if (rc)
2556						goto free_and_out;
2557				}
2558			}	/* end of for loop */
2559		}
2560		/* Return unused bus resources
2561		 * First use the temporary node to store information for
2562		 * the board */
2563		if (bus_node && temp_resources.bus_head) {
2564			hold_bus_node->length = bus_node->base - hold_bus_node->base;
2565
2566			hold_bus_node->next = func->bus_head;
2567			func->bus_head = hold_bus_node;
2568
2569			temp_byte = temp_resources.bus_head->base - 1;
2570
2571			/* set subordinate bus */
2572			rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2573
2574			if (temp_resources.bus_head->length == 0) {
2575				kfree(temp_resources.bus_head);
2576				temp_resources.bus_head = NULL;
2577			} else {
2578				return_resource(&(resources->bus_head), temp_resources.bus_head);
2579			}
2580		}
2581
2582		/* If we have IO space available and there is some left,
2583		 * return the unused portion */
2584		if (hold_IO_node && temp_resources.io_head) {
2585			io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2586							       &hold_IO_node, 0x1000);
2587
2588			/* Check if we were able to split something off */
2589			if (io_node) {
2590				hold_IO_node->base = io_node->base + io_node->length;
2591
2592				temp_byte = (hold_IO_node->base) >> 8;
2593				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2594
2595				return_resource(&(resources->io_head), io_node);
2596			}
2597
2598			io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2599
2600			/* Check if we were able to split something off */
2601			if (io_node) {
2602				/* First use the temporary node to store
2603				 * information for the board */
2604				hold_IO_node->length = io_node->base - hold_IO_node->base;
2605
2606				/* If we used any, add it to the board's list */
2607				if (hold_IO_node->length) {
2608					hold_IO_node->next = func->io_head;
2609					func->io_head = hold_IO_node;
2610
2611					temp_byte = (io_node->base - 1) >> 8;
2612					rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2613
2614					return_resource(&(resources->io_head), io_node);
2615				} else {
2616					/* it doesn't need any IO */
2617					temp_word = 0x0000;
2618					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_IO_LIMIT, temp_word);
2619
2620					return_resource(&(resources->io_head), io_node);
2621					kfree(hold_IO_node);
2622				}
2623			} else {
2624				/* it used most of the range */
2625				hold_IO_node->next = func->io_head;
2626				func->io_head = hold_IO_node;
2627			}
2628		} else if (hold_IO_node) {
2629			/* it used the whole range */
2630			hold_IO_node->next = func->io_head;
2631			func->io_head = hold_IO_node;
2632		}
2633		/* If we have memory space available and there is some left,
2634		 * return the unused portion */
2635		if (hold_mem_node && temp_resources.mem_head) {
2636			mem_node = do_pre_bridge_resource_split(&(temp_resources.  mem_head),
2637								&hold_mem_node, 0x100000);
2638
2639			/* Check if we were able to split something off */
2640			if (mem_node) {
2641				hold_mem_node->base = mem_node->base + mem_node->length;
2642
2643				temp_word = (hold_mem_node->base) >> 16;
2644				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2645
2646				return_resource(&(resources->mem_head), mem_node);
2647			}
2648
2649			mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
2650
2651			/* Check if we were able to split something off */
2652			if (mem_node) {
2653				/* First use the temporary node to store
2654				 * information for the board */
2655				hold_mem_node->length = mem_node->base - hold_mem_node->base;
2656
2657				if (hold_mem_node->length) {
2658					hold_mem_node->next = func->mem_head;
2659					func->mem_head = hold_mem_node;
2660
2661					/* configure end address */
2662					temp_word = (mem_node->base - 1) >> 16;
2663					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2664
2665					/* Return unused resources to the pool */
2666					return_resource(&(resources->mem_head), mem_node);
2667				} else {
2668					/* it doesn't need any Mem */
2669					temp_word = 0x0000;
2670					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2671
2672					return_resource(&(resources->mem_head), mem_node);
2673					kfree(hold_mem_node);
2674				}
2675			} else {
2676				/* it used most of the range */
2677				hold_mem_node->next = func->mem_head;
2678				func->mem_head = hold_mem_node;
2679			}
2680		} else if (hold_mem_node) {
2681			/* it used the whole range */
2682			hold_mem_node->next = func->mem_head;
2683			func->mem_head = hold_mem_node;
2684		}
2685		/* If we have prefetchable memory space available and there
2686		 * is some left at the end, return the unused portion */
2687		if (temp_resources.p_mem_head) {
2688			p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2689								  &hold_p_mem_node, 0x100000);
2690
2691			/* Check if we were able to split something off */
2692			if (p_mem_node) {
2693				hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2694
2695				temp_word = (hold_p_mem_node->base) >> 16;
2696				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2697
2698				return_resource(&(resources->p_mem_head), p_mem_node);
2699			}
2700
2701			p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
2702
2703			/* Check if we were able to split something off */
2704			if (p_mem_node) {
2705				/* First use the temporary node to store
2706				 * information for the board */
2707				hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2708
2709				/* If we used any, add it to the board's list */
2710				if (hold_p_mem_node->length) {
2711					hold_p_mem_node->next = func->p_mem_head;
2712					func->p_mem_head = hold_p_mem_node;
2713
2714					temp_word = (p_mem_node->base - 1) >> 16;
2715					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2716
2717					return_resource(&(resources->p_mem_head), p_mem_node);
2718				} else {
2719					/* it doesn't need any PMem */
2720					temp_word = 0x0000;
2721					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2722
2723					return_resource(&(resources->p_mem_head), p_mem_node);
2724					kfree(hold_p_mem_node);
2725				}
2726			} else {
2727				/* it used the most of the range */
2728				hold_p_mem_node->next = func->p_mem_head;
2729				func->p_mem_head = hold_p_mem_node;
2730			}
2731		} else if (hold_p_mem_node) {
2732			/* it used the whole range */
2733			hold_p_mem_node->next = func->p_mem_head;
2734			func->p_mem_head = hold_p_mem_node;
2735		}
2736		/* We should be configuring an IRQ and the bridge's base address
2737		 * registers if it needs them.  Although we have never seen such
2738		 * a device */
2739
2740		/* enable card */
2741		command = 0x0157;	/* = PCI_COMMAND_IO |
2742					 *   PCI_COMMAND_MEMORY |
2743					 *   PCI_COMMAND_MASTER |
2744					 *   PCI_COMMAND_INVALIDATE |
2745					 *   PCI_COMMAND_PARITY |
2746					 *   PCI_COMMAND_SERR */
2747		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
2748
2749		/* set Bridge Control Register */
2750		command = 0x07;		/* = PCI_BRIDGE_CTL_PARITY |
2751					 *   PCI_BRIDGE_CTL_SERR |
2752					 *   PCI_BRIDGE_CTL_NO_ISA */
2753		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
2754	} else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2755		/* Standard device */
2756		rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
2757
2758		if (class_code == PCI_BASE_CLASS_DISPLAY) {
2759			/* Display (video) adapter (not supported) */
2760			return DEVICE_TYPE_NOT_SUPPORTED;
2761		}
2762		/* Figure out IO and memory needs */
2763		for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
2764			temp_register = 0xFFFFFFFF;
2765
2766			dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop);
2767			rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
2768
2769			rc = pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp_register);
2770			dbg("CND: base = 0x%x\n", temp_register);
2771
2772			if (temp_register) {	  /* If this register is implemented */
2773				if ((temp_register & 0x03L) == 0x01) {
2774					/* Map IO */
2775
2776					/* set base = amount of IO space */
2777					base = temp_register & 0xFFFFFFFC;
2778					base = ~base + 1;
2779
2780					dbg("CND:      length = 0x%x\n", base);
2781					io_node = get_io_resource(&(resources->io_head), base);
2782					if (!io_node)
2783						return -ENOMEM;
2784					dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
2785					    io_node->base, io_node->length, io_node->next);
2786					dbg("func (%p) io_head (%p)\n", func, func->io_head);
2787
2788					/* allocate the resource to the board */
2789					base = io_node->base;
2790					io_node->next = func->io_head;
2791					func->io_head = io_node;
 
 
 
 
2792				} else if ((temp_register & 0x0BL) == 0x08) {
2793					/* Map prefetchable memory */
2794					base = temp_register & 0xFFFFFFF0;
2795					base = ~base + 1;
2796
2797					dbg("CND:      length = 0x%x\n", base);
2798					p_mem_node = get_resource(&(resources->p_mem_head), base);
2799
2800					/* allocate the resource to the board */
2801					if (p_mem_node) {
2802						base = p_mem_node->base;
2803
2804						p_mem_node->next = func->p_mem_head;
2805						func->p_mem_head = p_mem_node;
2806					} else
2807						return -ENOMEM;
2808				} else if ((temp_register & 0x0BL) == 0x00) {
2809					/* Map memory */
2810					base = temp_register & 0xFFFFFFF0;
2811					base = ~base + 1;
2812
2813					dbg("CND:      length = 0x%x\n", base);
2814					mem_node = get_resource(&(resources->mem_head), base);
2815
2816					/* allocate the resource to the board */
2817					if (mem_node) {
2818						base = mem_node->base;
2819
2820						mem_node->next = func->mem_head;
2821						func->mem_head = mem_node;
2822					} else
2823						return -ENOMEM;
2824				} else {
2825					/* Reserved bits or requesting space below 1M */
2826					return NOT_ENOUGH_RESOURCES;
2827				}
2828
2829				rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2830
2831				/* Check for 64-bit base */
2832				if ((temp_register & 0x07L) == 0x04) {
2833					cloop += 4;
2834
2835					/* Upper 32 bits of address always zero
2836					 * on today's systems */
2837					/* FIXME this is probably not true on
2838					 * Alpha and ia64??? */
2839					base = 0;
2840					rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2841				}
2842			}
2843		}		/* End of base register loop */
2844		if (cpqhp_legacy_mode) {
2845			/* Figure out which interrupt pin this function uses */
2846			rc = pci_bus_read_config_byte(pci_bus, devfn,
2847				PCI_INTERRUPT_PIN, &temp_byte);
2848
2849			/* If this function needs an interrupt and we are behind
2850			 * a bridge and the pin is tied to something that's
2851			 * already mapped, set this one the same */
2852			if (temp_byte && resources->irqs &&
2853			    (resources->irqs->valid_INT &
2854			     (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
2855				/* We have to share with something already set up */
2856				IRQ = resources->irqs->interrupt[(temp_byte +
2857					resources->irqs->barber_pole - 1) & 0x03];
2858			} else {
2859				/* Program IRQ based on card type */
2860				rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
2861
2862				if (class_code == PCI_BASE_CLASS_STORAGE)
2863					IRQ = cpqhp_disk_irq;
2864				else
2865					IRQ = cpqhp_nic_irq;
2866			}
2867
2868			/* IRQ Line */
2869			rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
2870		}
2871
2872		if (!behind_bridge) {
2873			rc = cpqhp_set_irq(func->bus, func->device, temp_byte, IRQ);
2874			if (rc)
2875				return 1;
2876		} else {
2877			/* TBD - this code may also belong in the other clause
2878			 * of this If statement */
2879			resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
2880			resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
2881		}
2882
2883		/* Latency Timer */
2884		temp_byte = 0x40;
2885		rc = pci_bus_write_config_byte(pci_bus, devfn,
2886					PCI_LATENCY_TIMER, temp_byte);
2887
2888		/* Cache Line size */
2889		temp_byte = 0x08;
2890		rc = pci_bus_write_config_byte(pci_bus, devfn,
2891					PCI_CACHE_LINE_SIZE, temp_byte);
2892
2893		/* disable ROM base Address */
2894		temp_dword = 0x00L;
2895		rc = pci_bus_write_config_word(pci_bus, devfn,
2896					PCI_ROM_ADDRESS, temp_dword);
2897
2898		/* enable card */
2899		temp_word = 0x0157;	/* = PCI_COMMAND_IO |
2900					 *   PCI_COMMAND_MEMORY |
2901					 *   PCI_COMMAND_MASTER |
2902					 *   PCI_COMMAND_INVALIDATE |
2903					 *   PCI_COMMAND_PARITY |
2904					 *   PCI_COMMAND_SERR */
2905		rc = pci_bus_write_config_word(pci_bus, devfn,
2906					PCI_COMMAND, temp_word);
2907	} else {		/* End of Not-A-Bridge else */
2908		/* It's some strange type of PCI adapter (Cardbus?) */
2909		return DEVICE_TYPE_NOT_SUPPORTED;
2910	}
2911
2912	func->configured = 1;
2913
2914	return 0;
2915free_and_out:
2916	cpqhp_destroy_resource_list(&temp_resources);
2917
2918	return_resource(&(resources->bus_head), hold_bus_node);
2919	return_resource(&(resources->io_head), hold_IO_node);
2920	return_resource(&(resources->mem_head), hold_mem_node);
2921	return_resource(&(resources->p_mem_head), hold_p_mem_node);
2922	return rc;
2923}