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linux-sg2042/drivers/pci/hotplug/ibmphp_ebda.c

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// 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", __func__, ptr->chassis_num);
}
}
static void print_vg_info(void)
{
struct rio_detail *ptr;
debug("%s ---\n", __func__);
list_for_each_entry(ptr, &rio_vg_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", __func__, ptr->chassis_num);
}
}
static void __init print_ebda_pci_rsrc(void)
{
struct ebda_pci_rsrc *ptr;
list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
__func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
}
}
static void __init print_ibm_slot(void)
{
struct slot *ptr;
list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
debug("%s - slot_number: %x\n", __func__, ptr->number);
}
}
static void __init print_opt_vg(void)
{
struct opt_rio *ptr;
debug("%s ---\n", __func__);
list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
debug("%s - rio_type %x\n", __func__, ptr->rio_type);
debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
}
}
static void __init print_ebda_hpc(void)
{
struct controller *hpc_ptr;
u16 index;
list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
for (index = 0; index < hpc_ptr->slot_count; index++) {
debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
}
for (index = 0; index < hpc_ptr->bus_count; index++)
debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
switch (hpc_ptr->ctlr_type) {
case 1:
debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
break;
case 0:
debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
break;
case 2:
case 4:
debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
break;
}
}
}
int __init ibmphp_access_ebda(void)
{
u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
int rc = 0;
rio_complete = 0;
hs_complete = 0;
io_mem = ioremap((0x40 << 4) + 0x0e, 2);
if (!io_mem)
return -ENOMEM;
ebda_seg = readw(io_mem);
iounmap(io_mem);
debug("returned ebda segment: %x\n", ebda_seg);
io_mem = ioremap(ebda_seg<<4, 1);
if (!io_mem)
return -ENOMEM;
ebda_sz = readb(io_mem);
iounmap(io_mem);
debug("ebda size: %d(KiB)\n", ebda_sz);
if (ebda_sz == 0)
return -ENOMEM;
io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
if (!io_mem)
return -ENOMEM;
next_offset = 0x180;
for (;;) {
offset = next_offset;
/* Make sure what we read is still in the mapped section */
if (WARN(offset > (ebda_sz * 1024 - 4),
"ibmphp_ebda: next read is beyond ebda_sz\n"))
break;
next_offset = readw(io_mem + offset); /* offset of next blk */
offset += 2;
if (next_offset == 0) /* 0 indicate it's last blk */
break;
blk_id = readw(io_mem + offset); /* this blk id */
offset += 2;
/* check if it is hot swap block or rio block */
if (blk_id != 0x4853 && blk_id != 0x4752)
continue;
/* found hs table */
if (blk_id == 0x4853) {
debug("now enter hot swap block---\n");
debug("hot blk id: %x\n", blk_id);
format = readb(io_mem + offset);
offset += 1;
if (format != 4)
goto error_nodev;
debug("hot blk format: %x\n", format);
/* hot swap sub blk */
base = offset;
sub_addr = base;
re = readw(io_mem + sub_addr); /* next sub blk */
sub_addr += 2;
rc_id = readw(io_mem + sub_addr); /* sub blk id */
sub_addr += 2;
if (rc_id != 0x5243)
goto error_nodev;
/* rc sub blk signature */
num_ctlrs = readb(io_mem + sub_addr);
sub_addr += 1;
hpc_list_ptr = alloc_ebda_hpc_list();
if (!hpc_list_ptr) {
rc = -ENOMEM;
goto out;
}
hpc_list_ptr->format = format;
hpc_list_ptr->num_ctlrs = num_ctlrs;
hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */
debug("info about hpc descriptor---\n");
debug("hot blk format: %x\n", format);
debug("num of controller: %x\n", num_ctlrs);
debug("offset of hpc data structure entries: %x\n ", sub_addr);
sub_addr = base + re; /* re sub blk */
/* FIXME: rc is never used/checked */
rc = readw(io_mem + sub_addr); /* next sub blk */
sub_addr += 2;
re_id = readw(io_mem + sub_addr); /* sub blk id */
sub_addr += 2;
if (re_id != 0x5245)
goto error_nodev;
/* signature of re */
num_entries = readw(io_mem + sub_addr);
sub_addr += 2; /* offset of RSRC_ENTRIES blk */
rsrc_list_ptr = alloc_ebda_rsrc_list();
if (!rsrc_list_ptr) {
rc = -ENOMEM;
goto out;
}
rsrc_list_ptr->format = format;
rsrc_list_ptr->num_entries = num_entries;
rsrc_list_ptr->phys_addr = sub_addr;
debug("info about rsrc descriptor---\n");
debug("format: %x\n", format);
debug("num of rsrc: %x\n", num_entries);
debug("offset of rsrc data structure entries: %x\n ", sub_addr);
hs_complete = 1;
} else {
/* found rio table, blk_id == 0x4752 */
debug("now enter io table ---\n");
debug("rio blk id: %x\n", blk_id);
rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
if (!rio_table_ptr) {
rc = -ENOMEM;
goto out;
}
rio_table_ptr->ver_num = readb(io_mem + offset);
rio_table_ptr->scal_count = readb(io_mem + offset + 1);
rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
rio_table_ptr->offset = offset + 3 ;
debug("info about rio table hdr ---\n");
debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
rio_table_ptr->ver_num, rio_table_ptr->scal_count,
rio_table_ptr->riodev_count, rio_table_ptr->offset);
rio_complete = 1;
}
}
if (!hs_complete && !rio_complete)
goto error_nodev;
if (rio_table_ptr) {
if (rio_complete && rio_table_ptr->ver_num == 3) {
rc = ebda_rio_table();
if (rc)
goto out;
}
}
rc = ebda_rsrc_controller();
if (rc)
goto out;
rc = ebda_rsrc_rsrc();
goto out;
error_nodev:
rc = -ENODEV;
out:
iounmap(io_mem);
return rc;
}
/*
* map info of scalability details and rio details from physical address
*/
static int __init ebda_rio_table(void)
{
u16 offset;
u8 i;
struct rio_detail *rio_detail_ptr;
offset = rio_table_ptr->offset;
offset += 12 * rio_table_ptr->scal_count;
// we do concern about rio details
for (i = 0; i < rio_table_ptr->riodev_count; i++) {
rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
if (!rio_detail_ptr)
return -ENOMEM;
rio_detail_ptr->rio_node_id = readb(io_mem + offset);
rio_detail_ptr->bbar = readl(io_mem + offset + 1);
rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
rio_detail_ptr->status = readb(io_mem + offset + 12);
rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
// 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);
//create linked list of chassis
if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
//create linked list of expansion box
else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
else
// not in my concern
kfree(rio_detail_ptr);
offset += 15;
}
print_lo_info();
print_vg_info();
return 0;
}
/*
* reorganizing linked list of chassis
*/
static struct opt_rio *search_opt_vg(u8 chassis_num)
{
struct opt_rio *ptr;
list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
if (ptr->chassis_num == chassis_num)
return ptr;
}
return NULL;
}
static int __init combine_wpg_for_chassis(void)
{
struct opt_rio *opt_rio_ptr = NULL;
struct rio_detail *rio_detail_ptr = NULL;
list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
if (!opt_rio_ptr) {
opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
if (!opt_rio_ptr)
return -ENOMEM;
opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
} else {
opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
}
}
print_opt_vg();
return 0;
}
/*
* reorganizing linked list of expansion box
*/
static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
{
struct opt_rio_lo *ptr;
list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
if (ptr->chassis_num == chassis_num)
return ptr;
}
return NULL;
}
static int combine_wpg_for_expansion(void)
{
struct opt_rio_lo *opt_rio_lo_ptr = NULL;
struct rio_detail *rio_detail_ptr = NULL;
list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
if (!opt_rio_lo_ptr) {
opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
if (!opt_rio_lo_ptr)
return -ENOMEM;
opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
opt_rio_lo_ptr->pack_count = 1;
list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
} else {
opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
opt_rio_lo_ptr->pack_count = 2;
}
}
return 0;
}
/* Since we don't know the max slot number per each chassis, hence go
* through the list of all chassis to find out the range
* Arguments: slot_num, 1st slot number of the chassis we think we are on,
* var (0 = chassis, 1 = expansion box)
*/
static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
{
struct opt_rio *opt_vg_ptr = NULL;
struct opt_rio_lo *opt_lo_ptr = NULL;
int rc = 0;
if (!var) {
list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
rc = -ENODEV;
break;
}
}
} else {
list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
rc = -ENODEV;
break;
}
}
}
return rc;
}
static struct opt_rio_lo *find_rxe_num(u8 slot_num)
{
struct opt_rio_lo *opt_lo_ptr;
list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
//check to see if this slot_num belongs to expansion box
if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
return opt_lo_ptr;
}
return NULL;
}
static struct opt_rio *find_chassis_num(u8 slot_num)
{
struct opt_rio *opt_vg_ptr;
list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
//check to see if this slot_num belongs to chassis
if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
return opt_vg_ptr;
}
return NULL;
}
/* This routine will find out how many slots are in the chassis, so that
* the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
*/
static u8 calculate_first_slot(u8 slot_num)
{
u8 first_slot = 1;
struct slot *slot_cur;
list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
if (slot_cur->ctrl) {
if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
first_slot = slot_cur->ctrl->ending_slot_num;
}
}
return first_slot + 1;
}
#define SLOT_NAME_SIZE 30
static char *create_file_name(struct slot *slot_cur)
{
struct opt_rio *opt_vg_ptr = NULL;
struct opt_rio_lo *opt_lo_ptr = NULL;
static char str[SLOT_NAME_SIZE];
int which = 0; /* rxe = 1, chassis = 0 */
u8 number = 1; /* either chassis or rxe # */
u8 first_slot = 1;
u8 slot_num;
u8 flag = 0;
if (!slot_cur) {
err("Structure passed is empty\n");
return NULL;
}
slot_num = slot_cur->number;
memset(str, 0, sizeof(str));
if (rio_table_ptr) {
if (rio_table_ptr->ver_num == 3) {
opt_vg_ptr = find_chassis_num(slot_num);
opt_lo_ptr = find_rxe_num(slot_num);
}
}
if (opt_vg_ptr) {
if (opt_lo_ptr) {
if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
number = opt_lo_ptr->chassis_num;
first_slot = opt_lo_ptr->first_slot_num;
which = 1; /* it is RXE */
} else {
first_slot = opt_vg_ptr->first_slot_num;
number = opt_vg_ptr->chassis_num;
which = 0;
}
} else {
first_slot = opt_vg_ptr->first_slot_num;
number = opt_vg_ptr->chassis_num;
which = 0;
}
++flag;
} else if (opt_lo_ptr) {
number = opt_lo_ptr->chassis_num;
first_slot = opt_lo_ptr->first_slot_num;
which = 1;
++flag;
} else if (rio_table_ptr) {
if (rio_table_ptr->ver_num == 3) {
/* if both NULL and we DO have correct RIO table in BIOS */
return NULL;
}
}
if (!flag) {
if (slot_cur->ctrl->ctlr_type == 4) {
first_slot = calculate_first_slot(slot_num);
which = 1;
} else {
which = 0;
}
}
sprintf(str, "%s%dslot%d",
which == 0 ? "chassis" : "rxe",
number, slot_num - first_slot + 1);
return str;
}
static int fillslotinfo(struct hotplug_slot *hotplug_slot)
{
struct slot *slot;
int rc = 0;
slot = to_slot(hotplug_slot);
rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
return rc;
}
static struct pci_driver ibmphp_driver;
/*
* map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
* each hpc from physical address to a list of hot plug controllers based on
* hpc descriptors.
*/
static int __init ebda_rsrc_controller(void)
{
u16 addr, addr_slot, addr_bus;
u8 ctlr_id, temp, bus_index;
u16 ctlr, slot, bus;
u16 slot_num, bus_num, index;
struct controller *hpc_ptr;
struct ebda_hpc_bus *bus_ptr;
struct ebda_hpc_slot *slot_ptr;
struct bus_info *bus_info_ptr1, *bus_info_ptr2;
int rc;
struct slot *tmp_slot;
char name[SLOT_NAME_SIZE];
addr = hpc_list_ptr->phys_addr;
for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
bus_index = 1;
ctlr_id = readb(io_mem + addr);
addr += 1;
slot_num = readb(io_mem + addr);
addr += 1;
addr_slot = addr; /* offset of slot structure */
addr += (slot_num * 4);
bus_num = readb(io_mem + addr);
addr += 1;
addr_bus = addr; /* offset of bus */
addr += (bus_num * 9); /* offset of ctlr_type */
temp = readb(io_mem + addr);
addr += 1;
/* init hpc structure */
hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
if (!hpc_ptr) {
rc = -ENOMEM;
goto error_no_hpc;
}
hpc_ptr->ctlr_id = ctlr_id;
hpc_ptr->ctlr_relative_id = ctlr;
hpc_ptr->slot_count = slot_num;
hpc_ptr->bus_count = bus_num;
debug("now enter ctlr data structure ---\n");
debug("ctlr id: %x\n", ctlr_id);
debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
debug("count of slots controlled by this ctlr: %x\n", slot_num);
debug("count of buses controlled by this ctlr: %x\n", bus_num);
/* init slot structure, fetch slot, bus, cap... */
slot_ptr = hpc_ptr->slots;
for (slot = 0; slot < slot_num; slot++) {
slot_ptr->slot_num = readb(io_mem + addr_slot);
slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
// create bus_info lined list --- if only one slot per bus: slot_min = slot_max
bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
if (!bus_info_ptr2) {
bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
if (!bus_info_ptr1) {
rc = -ENOMEM;
goto error_no_slot;
}
bus_info_ptr1->slot_min = slot_ptr->slot_num;
bus_info_ptr1->slot_max = slot_ptr->slot_num;
bus_info_ptr1->slot_count += 1;
bus_info_ptr1->busno = slot_ptr->slot_bus_num;
bus_info_ptr1->index = bus_index++;
bus_info_ptr1->current_speed = 0xff;
bus_info_ptr1->current_bus_mode = 0xff;
bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
} else {
bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
bus_info_ptr2->slot_count += 1;
}
// end of creating the bus_info linked list
slot_ptr++;
addr_slot += 1;
}
/* init bus structure */
bus_ptr = hpc_ptr->buses;
for (bus = 0; bus < bus_num; bus++) {
bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
if (bus_info_ptr2) {
bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
}
bus_ptr++;
}
hpc_ptr->ctlr_type = temp;
switch (hpc_ptr->ctlr_type) {
case 1:
hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
hpc_ptr->irq = readb(io_mem + addr + 2);
addr += 3;
debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
hpc_ptr->u.pci_ctlr.bus,
hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
break;
case 0:
hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
(hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
"ibmphp")) {
rc = -ENODEV;
goto error_no_slot;
}
hpc_ptr->irq = readb(io_mem + addr + 4);
addr += 5;
break;
case 2:
case 4:
hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
hpc_ptr->irq = readb(io_mem + addr + 5);
addr += 6;
break;
default:
rc = -ENODEV;
goto error_no_slot;
}
//reorganize chassis' linked list
combine_wpg_for_chassis();
combine_wpg_for_expansion();
hpc_ptr->revision = 0xff;
hpc_ptr->options = 0xff;
hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
// register slots with hpc core as well as create linked list of ibm slot
for (index = 0; index < hpc_ptr->slot_count; index++) {
tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
if (!tmp_slot) {
rc = -ENOMEM;
goto error_no_slot;
}
tmp_slot->flag = 1;
tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
tmp_slot->supported_speed = 3;
else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
tmp_slot->supported_speed = 2;
else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
tmp_slot->supported_speed = 1;
if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
tmp_slot->supported_bus_mode = 1;
else
tmp_slot->supported_bus_mode = 0;
tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
if (!bus_info_ptr1) {
rc = -ENODEV;
goto error;
}
tmp_slot->bus_on = bus_info_ptr1;
bus_info_ptr1 = NULL;
tmp_slot->ctrl = hpc_ptr;
tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
tmp_slot->number = hpc_ptr->slots[index].slot_num;
rc = fillslotinfo(&tmp_slot->hotplug_slot);
if (rc)
goto error;
rc = ibmphp_init_devno(&tmp_slot);
if (rc)
goto error;
tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops;
// end of registering ibm slot with hotplug core
list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head);
}
print_bus_info();
list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
} /* each hpc */
list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
pci_hp_register(&tmp_slot->hotplug_slot,
pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
}
print_ebda_hpc();
print_ibm_slot();
return 0;
error:
kfree(tmp_slot);
error_no_slot:
free_ebda_hpc(hpc_ptr);
error_no_hpc:
iounmap(io_mem);
return rc;
}
/*
* map info (bus, devfun, start addr, end addr..) of i/o, memory,
* pfm from the physical addr to a list of resource.
*/
static int __init ebda_rsrc_rsrc(void)
{
u16 addr;
short rsrc;
u8 type, rsrc_type;
struct ebda_pci_rsrc *rsrc_ptr;
addr = rsrc_list_ptr->phys_addr;
debug("now entering rsrc land\n");
debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
type = readb(io_mem + addr);
addr += 1;
rsrc_type = type & EBDA_RSRC_TYPE_MASK;
if (rsrc_type == EBDA_IO_RSRC_TYPE) {
rsrc_ptr = alloc_ebda_pci_rsrc();
if (!rsrc_ptr) {
iounmap(io_mem);
return -ENOMEM;
}
rsrc_ptr->rsrc_type = type;
rsrc_ptr->bus_num = readb(io_mem + addr);
rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
rsrc_ptr->start_addr = readw(io_mem + addr + 2);
rsrc_ptr->end_addr = readw(io_mem + addr + 4);
addr += 6;
debug("rsrc from io type ----\n");
debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
}
if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
rsrc_ptr = alloc_ebda_pci_rsrc();
if (!rsrc_ptr) {
iounmap(io_mem);
return -ENOMEM;
}
rsrc_ptr->rsrc_type = type;
rsrc_ptr->bus_num = readb(io_mem + addr);
rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
rsrc_ptr->start_addr = readl(io_mem + addr + 2);
rsrc_ptr->end_addr = readl(io_mem + addr + 6);
addr += 10;
debug("rsrc from mem or pfm ---\n");
debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
}
}
kfree(rsrc_list_ptr);
rsrc_list_ptr = NULL;
print_ebda_pci_rsrc();
return 0;
}
u16 ibmphp_get_total_controllers(void)
{
return hpc_list_ptr->num_ctlrs;
}
struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
{
struct slot *slot;
list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
if (slot->number == physical_num)
return slot;
}
return NULL;
}
/* To find:
* - the smallest slot number
* - the largest slot number
* - the total number of the slots based on each bus
* (if only one slot per bus slot_min = slot_max )
*/
struct bus_info *ibmphp_find_same_bus_num(u32 num)
{
struct bus_info *ptr;
list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
if (ptr->busno == num)
return ptr;
}
return NULL;
}
/* Finding relative bus number, in order to map corresponding
* bus register
*/
int ibmphp_get_bus_index(u8 num)
{
struct bus_info *ptr;
list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
if (ptr->busno == num)
return ptr->index;
}
return -ENODEV;
}
void ibmphp_free_bus_info_queue(void)
{
struct bus_info *bus_info, *next;
list_for_each_entry_safe(bus_info, next, &bus_info_head,
bus_info_list) {
kfree (bus_info);
}
}
void ibmphp_free_ebda_hpc_queue(void)
{
struct controller *controller = NULL, *next;
int pci_flag = 0;
list_for_each_entry_safe(controller, next, &ebda_hpc_head,
ebda_hpc_list) {
if (controller->ctlr_type == 0)
release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
else if ((controller->ctlr_type == 1) && (!pci_flag)) {
++pci_flag;
pci_unregister_driver(&ibmphp_driver);
}
free_ebda_hpc(controller);
}
}
void ibmphp_free_ebda_pci_rsrc_queue(void)
{
struct ebda_pci_rsrc *resource, *next;
list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
ebda_pci_rsrc_list) {
kfree (resource);
resource = NULL;
}
}
static const struct pci_device_id id_table[] = {
{
.vendor = PCI_VENDOR_ID_IBM,
.device = HPC_DEVICE_ID,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = HPC_SUBSYSTEM_ID,
.class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
}, {}
};
MODULE_DEVICE_TABLE(pci, id_table);
static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
static struct pci_driver ibmphp_driver = {
.name = "ibmphp",
.id_table = id_table,
.probe = ibmphp_probe,
};
int ibmphp_register_pci(void)
{
struct controller *ctrl;
int rc = 0;
list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
if (ctrl->ctlr_type == 1) {
rc = pci_register_driver(&ibmphp_driver);
break;
}
}
return rc;
}
static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
{
struct controller *ctrl;
debug("inside ibmphp_probe\n");
list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
if (ctrl->ctlr_type == 1) {
if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
ctrl->ctrl_dev = dev;
debug("found device!!!\n");
debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
return 0;
}
}
}
return -ENODEV;
}
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