path: root/drivers/pci/hotplug/ibmphp_ebda.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * IBM Hot Plug Controller Driver
 *
 * Written By: Tong Yu, IBM Corporation
 *
 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001-2003 IBM Corp.
 *
 * All rights reserved.
 *
 * Send feedback to <gregkh@us.ibm.com>
 *
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/init.h>
#include "ibmphp.h"

/*
 * POST builds data blocks(in this data block definition, a char-1
 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
 * BIOS Data Area which describe the configuration of the hot-plug
 * controllers and resources used by the PCI Hot-Plug devices.
 *
 * This file walks EBDA, maps data block from physical addr,
 * reconstruct linked lists about all system resource(MEM, PFM, IO)
 * already assigned by POST, as well as linked lists about hot plug
 * controllers (ctlr#, slot#, bus&slot features...)
 */

/* Global lists */
LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
LIST_HEAD(ibmphp_slot_head);

/* Local variables */
static struct ebda_hpc_list *hpc_list_ptr;
static struct ebda_rsrc_list *rsrc_list_ptr;
static struct rio_table_hdr *rio_table_ptr = NULL;
static LIST_HEAD(ebda_hpc_head);
static LIST_HEAD(bus_info_head);
static LIST_HEAD(rio_vg_head);
static LIST_HEAD(rio_lo_head);
static LIST_HEAD(opt_vg_head);
static LIST_HEAD(opt_lo_head);
static void __iomem *io_mem;

/* Local functions */
static int ebda_rsrc_controller(void);
static int ebda_rsrc_rsrc(void);
static int ebda_rio_table(void);

static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
{
	return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
}

static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
{
	struct controller *controller;
	struct ebda_hpc_slot *slots;
	struct ebda_hpc_bus *buses;

	controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
	if (!controller)
		goto error;

	slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
	if (!slots)
		goto error_contr;
	controller->slots = slots;

	buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
	if (!buses)
		goto error_slots;
	controller->buses = buses;

	return controller;
error_slots:
	kfree(controller->slots);
error_contr:
	kfree(controller);
error:
	return NULL;
}

static void free_ebda_hpc(struct controller *controller)
{
	kfree(controller->slots);
	kfree(controller->buses);
	kfree(controller);
}

static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
{
	return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
}

static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
{
	return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
}

static void __init print_bus_info(void)
{
	struct bus_info *ptr;

	list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
		debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
		debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
		debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
		debug("%s - bus# = %x\n", __func__, ptr->busno);
		debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
		debug("%s - controller_id = %x\n", __func__, ptr->controller_id);

		debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
		debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
		debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
		debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
		debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);

	}
}

static void print_lo_info(void)
{
	struct rio_detail *ptr;
	debug("print_lo_info ----\n");
	list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
		debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
		debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
		debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
		debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
		debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
		debug("%s - chassis_num = %x\n