diff options
Diffstat (limited to 'drivers/pci/hotplug/ibmphp_ebda.c')
| -rw-r--r-- | drivers/pci/hotplug/ibmphp_ebda.c | 1118 |
1 files changed, 1118 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c new file mode 100644 index 000000000..7fb75401a --- /dev/null +++ b/drivers/pci/hotplug/ibmphp_ebda.c @@ -0,0 +1,1118 @@ +// 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) { + return -ENOMEM; + } + 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); + 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; +} |