1119 lines · c
1// SPDX-License-Identifier: GPL-2.0+2/*3 * IBM Hot Plug Controller Driver4 *5 * Written By: Tong Yu, IBM Corporation6 *7 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)8 * Copyright (C) 2001-2003 IBM Corp.9 *10 * All rights reserved.11 *12 * Send feedback to <gregkh@us.ibm.com>13 *14 */15 16#include <linux/module.h>17#include <linux/errno.h>18#include <linux/mm.h>19#include <linux/slab.h>20#include <linux/pci.h>21#include <linux/list.h>22#include <linux/init.h>23#include "ibmphp.h"24 25/*26 * POST builds data blocks(in this data block definition, a char-127 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended28 * BIOS Data Area which describe the configuration of the hot-plug29 * controllers and resources used by the PCI Hot-Plug devices.30 *31 * This file walks EBDA, maps data block from physical addr,32 * reconstruct linked lists about all system resource(MEM, PFM, IO)33 * already assigned by POST, as well as linked lists about hot plug34 * controllers (ctlr#, slot#, bus&slot features...)35 */36 37/* Global lists */38LIST_HEAD(ibmphp_ebda_pci_rsrc_head);39LIST_HEAD(ibmphp_slot_head);40 41/* Local variables */42static struct ebda_hpc_list *hpc_list_ptr;43static struct ebda_rsrc_list *rsrc_list_ptr;44static struct rio_table_hdr *rio_table_ptr = NULL;45static LIST_HEAD(ebda_hpc_head);46static LIST_HEAD(bus_info_head);47static LIST_HEAD(rio_vg_head);48static LIST_HEAD(rio_lo_head);49static LIST_HEAD(opt_vg_head);50static LIST_HEAD(opt_lo_head);51static void __iomem *io_mem;52 53/* Local functions */54static int ebda_rsrc_controller(void);55static int ebda_rsrc_rsrc(void);56static int ebda_rio_table(void);57 58static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)59{60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);61}62 63static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)64{65 struct controller *controller;66 struct ebda_hpc_slot *slots;67 struct ebda_hpc_bus *buses;68 69 controller = kzalloc(sizeof(struct controller), GFP_KERNEL);70 if (!controller)71 goto error;72 73 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);74 if (!slots)75 goto error_contr;76 controller->slots = slots;77 78 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);79 if (!buses)80 goto error_slots;81 controller->buses = buses;82 83 return controller;84error_slots:85 kfree(controller->slots);86error_contr:87 kfree(controller);88error:89 return NULL;90}91 92static void free_ebda_hpc(struct controller *controller)93{94 kfree(controller->slots);95 kfree(controller->buses);96 kfree(controller);97}98 99static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)100{101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);102}103 104static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)105{106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);107}108 109static void __init print_bus_info(void)110{111 struct bus_info *ptr;112 113 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {114 debug("%s - slot_min = %x\n", __func__, ptr->slot_min);115 debug("%s - slot_max = %x\n", __func__, ptr->slot_max);116 debug("%s - slot_count = %x\n", __func__, ptr->slot_count);117 debug("%s - bus# = %x\n", __func__, ptr->busno);118 debug("%s - current_speed = %x\n", __func__, ptr->current_speed);119 debug("%s - controller_id = %x\n", __func__, ptr->controller_id);120 121 debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);122 debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);123 debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);124 debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);125 debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);126 127 }128}129 130static void print_lo_info(void)131{132 struct rio_detail *ptr;133 debug("print_lo_info ----\n");134 list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {135 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);136 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);137 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);138 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);139 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);140 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);141 142 }143}144 145static void print_vg_info(void)146{147 struct rio_detail *ptr;148 debug("%s ---\n", __func__);149 list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {150 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);151 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);152 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);153 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);154 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);155 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);156 157 }158}159 160static void __init print_ebda_pci_rsrc(void)161{162 struct ebda_pci_rsrc *ptr;163 164 list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {165 debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",166 __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);167 }168}169 170static void __init print_ibm_slot(void)171{172 struct slot *ptr;173 174 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {175 debug("%s - slot_number: %x\n", __func__, ptr->number);176 }177}178 179static void __init print_opt_vg(void)180{181 struct opt_rio *ptr;182 debug("%s ---\n", __func__);183 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {184 debug("%s - rio_type %x\n", __func__, ptr->rio_type);185 debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);186 debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);187 debug("%s - middle_num: %x\n", __func__, ptr->middle_num);188 }189}190 191static void __init print_ebda_hpc(void)192{193 struct controller *hpc_ptr;194 u16 index;195 196 list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {197 for (index = 0; index < hpc_ptr->slot_count; index++) {198 debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);199 debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);200 debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);201 debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);202 }203 204 for (index = 0; index < hpc_ptr->bus_count; index++)205 debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);206 207 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);208 switch (hpc_ptr->ctlr_type) {209 case 1:210 debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);211 debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);212 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);213 break;214 215 case 0:216 debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);217 debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);218 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);219 break;220 221 case 2:222 case 4:223 debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);224 debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);225 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);226 break;227 }228 }229}230 231int __init ibmphp_access_ebda(void)232{233 u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;234 u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;235 int rc = 0;236 237 238 rio_complete = 0;239 hs_complete = 0;240 241 io_mem = ioremap((0x40 << 4) + 0x0e, 2);242 if (!io_mem)243 return -ENOMEM;244 ebda_seg = readw(io_mem);245 iounmap(io_mem);246 debug("returned ebda segment: %x\n", ebda_seg);247 248 io_mem = ioremap(ebda_seg<<4, 1);249 if (!io_mem)250 return -ENOMEM;251 ebda_sz = readb(io_mem);252 iounmap(io_mem);253 debug("ebda size: %d(KiB)\n", ebda_sz);254 if (ebda_sz == 0)255 return -ENOMEM;256 257 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));258 if (!io_mem)259 return -ENOMEM;260 next_offset = 0x180;261 262 for (;;) {263 offset = next_offset;264 265 /* Make sure what we read is still in the mapped section */266 if (WARN(offset > (ebda_sz * 1024 - 4),267 "ibmphp_ebda: next read is beyond ebda_sz\n"))268 break;269 270 next_offset = readw(io_mem + offset); /* offset of next blk */271 272 offset += 2;273 if (next_offset == 0) /* 0 indicate it's last blk */274 break;275 blk_id = readw(io_mem + offset); /* this blk id */276 277 offset += 2;278 /* check if it is hot swap block or rio block */279 if (blk_id != 0x4853 && blk_id != 0x4752)280 continue;281 /* found hs table */282 if (blk_id == 0x4853) {283 debug("now enter hot swap block---\n");284 debug("hot blk id: %x\n", blk_id);285 format = readb(io_mem + offset);286 287 offset += 1;288 if (format != 4)289 goto error_nodev;290 debug("hot blk format: %x\n", format);291 /* hot swap sub blk */292 base = offset;293 294 sub_addr = base;295 re = readw(io_mem + sub_addr); /* next sub blk */296 297 sub_addr += 2;298 rc_id = readw(io_mem + sub_addr); /* sub blk id */299 300 sub_addr += 2;301 if (rc_id != 0x5243)302 goto error_nodev;303 /* rc sub blk signature */304 num_ctlrs = readb(io_mem + sub_addr);305 306 sub_addr += 1;307 hpc_list_ptr = alloc_ebda_hpc_list();308 if (!hpc_list_ptr) {309 rc = -ENOMEM;310 goto out;311 }312 hpc_list_ptr->format = format;313 hpc_list_ptr->num_ctlrs = num_ctlrs;314 hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */315 debug("info about hpc descriptor---\n");316 debug("hot blk format: %x\n", format);317 debug("num of controller: %x\n", num_ctlrs);318 debug("offset of hpc data structure entries: %x\n ", sub_addr);319 320 sub_addr = base + re; /* re sub blk */321 /* FIXME: rc is never used/checked */322 rc = readw(io_mem + sub_addr); /* next sub blk */323 324 sub_addr += 2;325 re_id = readw(io_mem + sub_addr); /* sub blk id */326 327 sub_addr += 2;328 if (re_id != 0x5245)329 goto error_nodev;330 331 /* signature of re */332 num_entries = readw(io_mem + sub_addr);333 334 sub_addr += 2; /* offset of RSRC_ENTRIES blk */335 rsrc_list_ptr = alloc_ebda_rsrc_list();336 if (!rsrc_list_ptr) {337 rc = -ENOMEM;338 goto out;339 }340 rsrc_list_ptr->format = format;341 rsrc_list_ptr->num_entries = num_entries;342 rsrc_list_ptr->phys_addr = sub_addr;343 344 debug("info about rsrc descriptor---\n");345 debug("format: %x\n", format);346 debug("num of rsrc: %x\n", num_entries);347 debug("offset of rsrc data structure entries: %x\n ", sub_addr);348 349 hs_complete = 1;350 } else {351 /* found rio table, blk_id == 0x4752 */352 debug("now enter io table ---\n");353 debug("rio blk id: %x\n", blk_id);354 355 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);356 if (!rio_table_ptr) {357 rc = -ENOMEM;358 goto out;359 }360 rio_table_ptr->ver_num = readb(io_mem + offset);361 rio_table_ptr->scal_count = readb(io_mem + offset + 1);362 rio_table_ptr->riodev_count = readb(io_mem + offset + 2);363 rio_table_ptr->offset = offset + 3 ;364 365 debug("info about rio table hdr ---\n");366 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",367 rio_table_ptr->ver_num, rio_table_ptr->scal_count,368 rio_table_ptr->riodev_count, rio_table_ptr->offset);369 370 rio_complete = 1;371 }372 }373 374 if (!hs_complete && !rio_complete)375 goto error_nodev;376 377 if (rio_table_ptr) {378 if (rio_complete && rio_table_ptr->ver_num == 3) {379 rc = ebda_rio_table();380 if (rc)381 goto out;382 }383 }384 rc = ebda_rsrc_controller();385 if (rc)386 goto out;387 388 rc = ebda_rsrc_rsrc();389 goto out;390error_nodev:391 rc = -ENODEV;392out:393 iounmap(io_mem);394 return rc;395}396 397/*398 * map info of scalability details and rio details from physical address399 */400static int __init ebda_rio_table(void)401{402 u16 offset;403 u8 i;404 struct rio_detail *rio_detail_ptr;405 406 offset = rio_table_ptr->offset;407 offset += 12 * rio_table_ptr->scal_count;408 409 // we do concern about rio details410 for (i = 0; i < rio_table_ptr->riodev_count; i++) {411 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);412 if (!rio_detail_ptr)413 return -ENOMEM;414 rio_detail_ptr->rio_node_id = readb(io_mem + offset);415 rio_detail_ptr->bbar = readl(io_mem + offset + 1);416 rio_detail_ptr->rio_type = readb(io_mem + offset + 5);417 rio_detail_ptr->owner_id = readb(io_mem + offset + 6);418 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);419 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);420 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);421 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);422 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);423 rio_detail_ptr->status = readb(io_mem + offset + 12);424 rio_detail_ptr->wpindex = readb(io_mem + offset + 13);425 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);426// debug("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);427 //create linked list of chassis428 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)429 list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);430 //create linked list of expansion box431 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)432 list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);433 else434 // not in my concern435 kfree(rio_detail_ptr);436 offset += 15;437 }438 print_lo_info();439 print_vg_info();440 return 0;441}442 443/*444 * reorganizing linked list of chassis445 */446static struct opt_rio *search_opt_vg(u8 chassis_num)447{448 struct opt_rio *ptr;449 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {450 if (ptr->chassis_num == chassis_num)451 return ptr;452 }453 return NULL;454}455 456static int __init combine_wpg_for_chassis(void)457{458 struct opt_rio *opt_rio_ptr = NULL;459 struct rio_detail *rio_detail_ptr = NULL;460 461 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {462 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);463 if (!opt_rio_ptr) {464 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);465 if (!opt_rio_ptr)466 return -ENOMEM;467 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;468 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;469 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;470 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;471 list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);472 } else {473 opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);474 opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);475 }476 }477 print_opt_vg();478 return 0;479}480 481/*482 * reorganizing linked list of expansion box483 */484static struct opt_rio_lo *search_opt_lo(u8 chassis_num)485{486 struct opt_rio_lo *ptr;487 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {488 if (ptr->chassis_num == chassis_num)489 return ptr;490 }491 return NULL;492}493 494static int combine_wpg_for_expansion(void)495{496 struct opt_rio_lo *opt_rio_lo_ptr = NULL;497 struct rio_detail *rio_detail_ptr = NULL;498 499 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {500 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);501 if (!opt_rio_lo_ptr) {502 opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);503 if (!opt_rio_lo_ptr)504 return -ENOMEM;505 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;506 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;507 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;508 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;509 opt_rio_lo_ptr->pack_count = 1;510 511 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);512 } else {513 opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);514 opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);515 opt_rio_lo_ptr->pack_count = 2;516 }517 }518 return 0;519}520 521 522/* Since we don't know the max slot number per each chassis, hence go523 * through the list of all chassis to find out the range524 * Arguments: slot_num, 1st slot number of the chassis we think we are on,525 * var (0 = chassis, 1 = expansion box)526 */527static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)528{529 struct opt_rio *opt_vg_ptr = NULL;530 struct opt_rio_lo *opt_lo_ptr = NULL;531 int rc = 0;532 533 if (!var) {534 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {535 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {536 rc = -ENODEV;537 break;538 }539 }540 } else {541 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {542 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {543 rc = -ENODEV;544 break;545 }546 }547 }548 return rc;549}550 551static struct opt_rio_lo *find_rxe_num(u8 slot_num)552{553 struct opt_rio_lo *opt_lo_ptr;554 555 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {556 //check to see if this slot_num belongs to expansion box557 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))558 return opt_lo_ptr;559 }560 return NULL;561}562 563static struct opt_rio *find_chassis_num(u8 slot_num)564{565 struct opt_rio *opt_vg_ptr;566 567 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {568 //check to see if this slot_num belongs to chassis569 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))570 return opt_vg_ptr;571 }572 return NULL;573}574 575/* This routine will find out how many slots are in the chassis, so that576 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc577 */578static u8 calculate_first_slot(u8 slot_num)579{580 u8 first_slot = 1;581 struct slot *slot_cur;582 583 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {584 if (slot_cur->ctrl) {585 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))586 first_slot = slot_cur->ctrl->ending_slot_num;587 }588 }589 return first_slot + 1;590 591}592 593#define SLOT_NAME_SIZE 30594 595static char *create_file_name(struct slot *slot_cur)596{597 struct opt_rio *opt_vg_ptr = NULL;598 struct opt_rio_lo *opt_lo_ptr = NULL;599 static char str[SLOT_NAME_SIZE];600 int which = 0; /* rxe = 1, chassis = 0 */601 u8 number = 1; /* either chassis or rxe # */602 u8 first_slot = 1;603 u8 slot_num;604 u8 flag = 0;605 606 if (!slot_cur) {607 err("Structure passed is empty\n");608 return NULL;609 }610 611 slot_num = slot_cur->number;612 613 memset(str, 0, sizeof(str));614 615 if (rio_table_ptr) {616 if (rio_table_ptr->ver_num == 3) {617 opt_vg_ptr = find_chassis_num(slot_num);618 opt_lo_ptr = find_rxe_num(slot_num);619 }620 }621 if (opt_vg_ptr) {622 if (opt_lo_ptr) {623 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {624 number = opt_lo_ptr->chassis_num;625 first_slot = opt_lo_ptr->first_slot_num;626 which = 1; /* it is RXE */627 } else {628 first_slot = opt_vg_ptr->first_slot_num;629 number = opt_vg_ptr->chassis_num;630 which = 0;631 }632 } else {633 first_slot = opt_vg_ptr->first_slot_num;634 number = opt_vg_ptr->chassis_num;635 which = 0;636 }637 ++flag;638 } else if (opt_lo_ptr) {639 number = opt_lo_ptr->chassis_num;640 first_slot = opt_lo_ptr->first_slot_num;641 which = 1;642 ++flag;643 } else if (rio_table_ptr) {644 if (rio_table_ptr->ver_num == 3) {645 /* if both NULL and we DO have correct RIO table in BIOS */646 return NULL;647 }648 }649 if (!flag) {650 if (slot_cur->ctrl->ctlr_type == 4) {651 first_slot = calculate_first_slot(slot_num);652 which = 1;653 } else {654 which = 0;655 }656 }657 658 sprintf(str, "%s%dslot%d",659 which == 0 ? "chassis" : "rxe",660 number, slot_num - first_slot + 1);661 return str;662}663 664static int fillslotinfo(struct hotplug_slot *hotplug_slot)665{666 struct slot *slot;667 int rc = 0;668 669 slot = to_slot(hotplug_slot);670 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);671 return rc;672}673 674static struct pci_driver ibmphp_driver;675 676/*677 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of678 * each hpc from physical address to a list of hot plug controllers based on679 * hpc descriptors.680 */681static int __init ebda_rsrc_controller(void)682{683 u16 addr, addr_slot, addr_bus;684 u8 ctlr_id, temp, bus_index;685 u16 ctlr, slot, bus;686 u16 slot_num, bus_num, index;687 struct controller *hpc_ptr;688 struct ebda_hpc_bus *bus_ptr;689 struct ebda_hpc_slot *slot_ptr;690 struct bus_info *bus_info_ptr1, *bus_info_ptr2;691 int rc;692 struct slot *tmp_slot;693 char name[SLOT_NAME_SIZE];694 695 addr = hpc_list_ptr->phys_addr;696 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {697 bus_index = 1;698 ctlr_id = readb(io_mem + addr);699 addr += 1;700 slot_num = readb(io_mem + addr);701 702 addr += 1;703 addr_slot = addr; /* offset of slot structure */704 addr += (slot_num * 4);705 706 bus_num = readb(io_mem + addr);707 708 addr += 1;709 addr_bus = addr; /* offset of bus */710 addr += (bus_num * 9); /* offset of ctlr_type */711 temp = readb(io_mem + addr);712 713 addr += 1;714 /* init hpc structure */715 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);716 if (!hpc_ptr) {717 return -ENOMEM;718 }719 hpc_ptr->ctlr_id = ctlr_id;720 hpc_ptr->ctlr_relative_id = ctlr;721 hpc_ptr->slot_count = slot_num;722 hpc_ptr->bus_count = bus_num;723 debug("now enter ctlr data structure ---\n");724 debug("ctlr id: %x\n", ctlr_id);725 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);726 debug("count of slots controlled by this ctlr: %x\n", slot_num);727 debug("count of buses controlled by this ctlr: %x\n", bus_num);728 729 /* init slot structure, fetch slot, bus, cap... */730 slot_ptr = hpc_ptr->slots;731 for (slot = 0; slot < slot_num; slot++) {732 slot_ptr->slot_num = readb(io_mem + addr_slot);733 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);734 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);735 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);736 737 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max738 739 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);740 if (!bus_info_ptr2) {741 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);742 if (!bus_info_ptr1) {743 rc = -ENOMEM;744 goto error_no_slot;745 }746 bus_info_ptr1->slot_min = slot_ptr->slot_num;747 bus_info_ptr1->slot_max = slot_ptr->slot_num;748 bus_info_ptr1->slot_count += 1;749 bus_info_ptr1->busno = slot_ptr->slot_bus_num;750 bus_info_ptr1->index = bus_index++;751 bus_info_ptr1->current_speed = 0xff;752 bus_info_ptr1->current_bus_mode = 0xff;753 754 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;755 756 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);757 758 } else {759 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);760 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);761 bus_info_ptr2->slot_count += 1;762 763 }764 765 // end of creating the bus_info linked list766 767 slot_ptr++;768 addr_slot += 1;769 }770 771 /* init bus structure */772 bus_ptr = hpc_ptr->buses;773 for (bus = 0; bus < bus_num; bus++) {774 bus_ptr->bus_num = readb(io_mem + addr_bus + bus);775 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);776 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);777 778 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);779 780 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);781 782 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);783 784 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);785 if (bus_info_ptr2) {786 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;787 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;788 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;789 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;790 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;791 }792 bus_ptr++;793 }794 795 hpc_ptr->ctlr_type = temp;796 797 switch (hpc_ptr->ctlr_type) {798 case 1:799 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);800 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);801 hpc_ptr->irq = readb(io_mem + addr + 2);802 addr += 3;803 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",804 hpc_ptr->u.pci_ctlr.bus,805 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);806 break;807 808 case 0:809 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);810 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);811 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,812 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),813 "ibmphp")) {814 rc = -ENODEV;815 goto error_no_slot;816 }817 hpc_ptr->irq = readb(io_mem + addr + 4);818 addr += 5;819 break;820 821 case 2:822 case 4:823 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);824 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);825 hpc_ptr->irq = readb(io_mem + addr + 5);826 addr += 6;827 break;828 default:829 rc = -ENODEV;830 goto error_no_slot;831 }832 833 //reorganize chassis' linked list834 combine_wpg_for_chassis();835 combine_wpg_for_expansion();836 hpc_ptr->revision = 0xff;837 hpc_ptr->options = 0xff;838 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;839 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;840 841 // register slots with hpc core as well as create linked list of ibm slot842 for (index = 0; index < hpc_ptr->slot_count; index++) {843 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);844 if (!tmp_slot) {845 rc = -ENOMEM;846 goto error_no_slot;847 }848 849 tmp_slot->flag = 1;850 851 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;852 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)853 tmp_slot->supported_speed = 3;854 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)855 tmp_slot->supported_speed = 2;856 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)857 tmp_slot->supported_speed = 1;858 859 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)860 tmp_slot->supported_bus_mode = 1;861 else862 tmp_slot->supported_bus_mode = 0;863 864 865 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;866 867 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);868 if (!bus_info_ptr1) {869 rc = -ENODEV;870 goto error;871 }872 tmp_slot->bus_on = bus_info_ptr1;873 bus_info_ptr1 = NULL;874 tmp_slot->ctrl = hpc_ptr;875 876 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;877 tmp_slot->number = hpc_ptr->slots[index].slot_num;878 879 rc = fillslotinfo(&tmp_slot->hotplug_slot);880 if (rc)881 goto error;882 883 rc = ibmphp_init_devno(&tmp_slot);884 if (rc)885 goto error;886 tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops;887 888 // end of registering ibm slot with hotplug core889 890 list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head);891 }892 893 print_bus_info();894 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);895 896 } /* each hpc */897 898 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {899 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));900 pci_hp_register(&tmp_slot->hotplug_slot,901 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);902 }903 904 print_ebda_hpc();905 print_ibm_slot();906 return 0;907 908error:909 kfree(tmp_slot);910error_no_slot:911 free_ebda_hpc(hpc_ptr);912 return rc;913}914 915/*916 * map info (bus, devfun, start addr, end addr..) of i/o, memory,917 * pfm from the physical addr to a list of resource.918 */919static int __init ebda_rsrc_rsrc(void)920{921 u16 addr;922 short rsrc;923 u8 type, rsrc_type;924 struct ebda_pci_rsrc *rsrc_ptr;925 926 addr = rsrc_list_ptr->phys_addr;927 debug("now entering rsrc land\n");928 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);929 930 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {931 type = readb(io_mem + addr);932 933 addr += 1;934 rsrc_type = type & EBDA_RSRC_TYPE_MASK;935 936 if (rsrc_type == EBDA_IO_RSRC_TYPE) {937 rsrc_ptr = alloc_ebda_pci_rsrc();938 if (!rsrc_ptr) {939 iounmap(io_mem);940 return -ENOMEM;941 }942 rsrc_ptr->rsrc_type = type;943 944 rsrc_ptr->bus_num = readb(io_mem + addr);945 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);946 rsrc_ptr->start_addr = readw(io_mem + addr + 2);947 rsrc_ptr->end_addr = readw(io_mem + addr + 4);948 addr += 6;949 950 debug("rsrc from io type ----\n");951 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",952 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);953 954 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);955 }956 957 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {958 rsrc_ptr = alloc_ebda_pci_rsrc();959 if (!rsrc_ptr) {960 iounmap(io_mem);961 return -ENOMEM;962 }963 rsrc_ptr->rsrc_type = type;964 965 rsrc_ptr->bus_num = readb(io_mem + addr);966 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);967 rsrc_ptr->start_addr = readl(io_mem + addr + 2);968 rsrc_ptr->end_addr = readl(io_mem + addr + 6);969 addr += 10;970 971 debug("rsrc from mem or pfm ---\n");972 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",973 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);974 975 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);976 }977 }978 kfree(rsrc_list_ptr);979 rsrc_list_ptr = NULL;980 print_ebda_pci_rsrc();981 return 0;982}983 984u16 ibmphp_get_total_controllers(void)985{986 return hpc_list_ptr->num_ctlrs;987}988 989struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)990{991 struct slot *slot;992 993 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {994 if (slot->number == physical_num)995 return slot;996 }997 return NULL;998}999 1000/* To find:1001 * - the smallest slot number1002 * - the largest slot number1003 * - the total number of the slots based on each bus1004 * (if only one slot per bus slot_min = slot_max )1005 */1006struct bus_info *ibmphp_find_same_bus_num(u32 num)1007{1008 struct bus_info *ptr;1009 1010 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {1011 if (ptr->busno == num)1012 return ptr;1013 }1014 return NULL;1015}1016 1017/* Finding relative bus number, in order to map corresponding1018 * bus register1019 */1020int ibmphp_get_bus_index(u8 num)1021{1022 struct bus_info *ptr;1023 1024 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {1025 if (ptr->busno == num)1026 return ptr->index;1027 }1028 return -ENODEV;1029}1030 1031void ibmphp_free_bus_info_queue(void)1032{1033 struct bus_info *bus_info, *next;1034 1035 list_for_each_entry_safe(bus_info, next, &bus_info_head,1036 bus_info_list) {1037 kfree (bus_info);1038 }1039}1040 1041void ibmphp_free_ebda_hpc_queue(void)1042{1043 struct controller *controller = NULL, *next;1044 int pci_flag = 0;1045 1046 list_for_each_entry_safe(controller, next, &ebda_hpc_head,1047 ebda_hpc_list) {1048 if (controller->ctlr_type == 0)1049 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));1050 else if ((controller->ctlr_type == 1) && (!pci_flag)) {1051 ++pci_flag;1052 pci_unregister_driver(&ibmphp_driver);1053 }1054 free_ebda_hpc(controller);1055 }1056}1057 1058void ibmphp_free_ebda_pci_rsrc_queue(void)1059{1060 struct ebda_pci_rsrc *resource, *next;1061 1062 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,1063 ebda_pci_rsrc_list) {1064 kfree (resource);1065 resource = NULL;1066 }1067}1068 1069static const struct pci_device_id id_table[] = {1070 {1071 .vendor = PCI_VENDOR_ID_IBM,1072 .device = HPC_DEVICE_ID,1073 .subvendor = PCI_VENDOR_ID_IBM,1074 .subdevice = HPC_SUBSYSTEM_ID,1075 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),1076 }, {}1077};1078 1079MODULE_DEVICE_TABLE(pci, id_table);1080 1081static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);1082static struct pci_driver ibmphp_driver = {1083 .name = "ibmphp",1084 .id_table = id_table,1085 .probe = ibmphp_probe,1086};1087 1088int ibmphp_register_pci(void)1089{1090 struct controller *ctrl;1091 int rc = 0;1092 1093 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {1094 if (ctrl->ctlr_type == 1) {1095 rc = pci_register_driver(&ibmphp_driver);1096 break;1097 }1098 }1099 return rc;1100}1101static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)1102{1103 struct controller *ctrl;1104 1105 debug("inside ibmphp_probe\n");1106 1107 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {1108 if (ctrl->ctlr_type == 1) {1109 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {1110 ctrl->ctrl_dev = dev;1111 debug("found device!!!\n");1112 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);1113 return 0;1114 }1115 }1116 }1117 return -ENODEV;1118}1119