1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * IBM Hot Plug Controller Driver 4 * 5 * Written By: Tong Yu, IBM Corporation 6 * 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-1 27 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended 28 * BIOS Data Area which describe the configuration of the hot-plug 29 * 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 plug 34 * 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 address 399 */ 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 details 410 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 chassis 428 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 box 431 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 else 434 // not in my concern 435 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 chassis 445 */ 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 box 483 */ 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 go 523 * through the list of all chassis to find out the range 524 * 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 box 557 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 chassis 569 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 that 576 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc 577 */ 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 30 594 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...) of 678 * each hpc from physical address to a list of hot plug controllers based on 679 * 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_max 738 739 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 list 766 767 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 list 834 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 slot 842 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 else 862 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 core 889 890 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 number 1002 * - the largest slot number 1003 * - the total number of the slots based on each bus 1004 * (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 corresponding 1018 * bus register 1019 */ 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