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 */ 38 LIST_HEAD(ibmphp_ebda_pci_rsrc_head); 39 LIST_HEAD(ibmphp_slot_head); 40 41 /* Local variables */ 42 static struct ebda_hpc_list *hpc_list_ptr; 43 static struct ebda_rsrc_list *rsrc_list_ptr; 44 static struct rio_table_hdr *rio_table_ptr = NULL; 45 static LIST_HEAD(ebda_hpc_head); 46 static LIST_HEAD(bus_info_head); 47 static LIST_HEAD(rio_vg_head); 48 static LIST_HEAD(rio_lo_head); 49 static LIST_HEAD(opt_vg_head); 50 static LIST_HEAD(opt_lo_head); 51 static void __iomem *io_mem; 52 53 /* Local functions */ 54 static int ebda_rsrc_controller(void); 55 static int ebda_rsrc_rsrc(void); 56 static int ebda_rio_table(void); 57 58 static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void) 59 { 60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL); 61 } 62 63 static 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; 84 error_slots: 85 kfree(controller->slots); 86 error_contr: 87 kfree(controller); 88 error: 89 return NULL; 90 } 91 92 static void free_ebda_hpc(struct controller *controller) 93 { 94 kfree(controller->slots); 95 kfree(controller->buses); 96 kfree(controller); 97 } 98 99 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void) 100 { 101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL); 102 } 103 104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void) 105 { 106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL); 107 } 108 109 static 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 } 129 130 static 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 } 144 145 static 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 } 159 160 static 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 } 169 170 static 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 } 178 179 static 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 } 190 191 static 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 } 230 231 int __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; 390 error_nodev: 391 rc = -ENODEV; 392 out: 393 iounmap(io_mem); 394 return rc; 395 } 396 397 /* 398 * map info of scalability details and rio details from physical address 399 */ 400 static 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 */ 446 static 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 } 455 456 static 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 */ 484 static 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 } 493 494 static 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 */ 527 static 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 } 550 551 static 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 } 562 563 static 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 */ 578 static 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 30 594 595 static 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 } 663 664 static int fillslotinfo(struct hotplug_slot *hotplug_slot) 665 { 666 struct slot *slot; 667 int rc = 0; 668 669 if (!hotplug_slot || !hotplug_slot->private) 670 return -EINVAL; 671 672 slot = hotplug_slot->private; 673 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL); 674 if (rc) 675 return rc; 676 677 // power - enabled:1 not:0 678 hotplug_slot->info->power_status = SLOT_POWER(slot->status); 679 680 // attention - off:0, on:1, blinking:2 681 hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status); 682 683 // latch - open:1 closed:0 684 hotplug_slot->info->latch_status = SLOT_LATCH(slot->status); 685 686 // pci board - present:1 not:0 687 if (SLOT_PRESENT(slot->status)) 688 hotplug_slot->info->adapter_status = 1; 689 else 690 hotplug_slot->info->adapter_status = 0; 691 /* 692 if (slot->bus_on->supported_bus_mode 693 && (slot->bus_on->supported_speed == BUS_SPEED_66)) 694 hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX; 695 else 696 hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed; 697 */ 698 699 return rc; 700 } 701 702 static void release_slot(struct hotplug_slot *hotplug_slot) 703 { 704 struct slot *slot; 705 706 if (!hotplug_slot || !hotplug_slot->private) 707 return; 708 709 slot = hotplug_slot->private; 710 kfree(slot->hotplug_slot->info); 711 kfree(slot->hotplug_slot); 712 slot->ctrl = NULL; 713 slot->bus_on = NULL; 714 715 /* we don't want to actually remove the resources, since free_resources will do just that */ 716 ibmphp_unconfigure_card(&slot, -1); 717 718 kfree(slot); 719 } 720 721 static struct pci_driver ibmphp_driver; 722 723 /* 724 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of 725 * each hpc from physical address to a list of hot plug controllers based on 726 * hpc descriptors. 727 */ 728 static int __init ebda_rsrc_controller(void) 729 { 730 u16 addr, addr_slot, addr_bus; 731 u8 ctlr_id, temp, bus_index; 732 u16 ctlr, slot, bus; 733 u16 slot_num, bus_num, index; 734 struct hotplug_slot *hp_slot_ptr; 735 struct controller *hpc_ptr; 736 struct ebda_hpc_bus *bus_ptr; 737 struct ebda_hpc_slot *slot_ptr; 738 struct bus_info *bus_info_ptr1, *bus_info_ptr2; 739 int rc; 740 struct slot *tmp_slot; 741 char name[SLOT_NAME_SIZE]; 742 743 addr = hpc_list_ptr->phys_addr; 744 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) { 745 bus_index = 1; 746 ctlr_id = readb(io_mem + addr); 747 addr += 1; 748 slot_num = readb(io_mem + addr); 749 750 addr += 1; 751 addr_slot = addr; /* offset of slot structure */ 752 addr += (slot_num * 4); 753 754 bus_num = readb(io_mem + addr); 755 756 addr += 1; 757 addr_bus = addr; /* offset of bus */ 758 addr += (bus_num * 9); /* offset of ctlr_type */ 759 temp = readb(io_mem + addr); 760 761 addr += 1; 762 /* init hpc structure */ 763 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num); 764 if (!hpc_ptr) { 765 rc = -ENOMEM; 766 goto error_no_hpc; 767 } 768 hpc_ptr->ctlr_id = ctlr_id; 769 hpc_ptr->ctlr_relative_id = ctlr; 770 hpc_ptr->slot_count = slot_num; 771 hpc_ptr->bus_count = bus_num; 772 debug("now enter ctlr data structure ---\n"); 773 debug("ctlr id: %x\n", ctlr_id); 774 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id); 775 debug("count of slots controlled by this ctlr: %x\n", slot_num); 776 debug("count of buses controlled by this ctlr: %x\n", bus_num); 777 778 /* init slot structure, fetch slot, bus, cap... */ 779 slot_ptr = hpc_ptr->slots; 780 for (slot = 0; slot < slot_num; slot++) { 781 slot_ptr->slot_num = readb(io_mem + addr_slot); 782 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num); 783 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num); 784 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num); 785 786 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max 787 788 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num); 789 if (!bus_info_ptr2) { 790 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL); 791 if (!bus_info_ptr1) { 792 rc = -ENOMEM; 793 goto error_no_hp_slot; 794 } 795 bus_info_ptr1->slot_min = slot_ptr->slot_num; 796 bus_info_ptr1->slot_max = slot_ptr->slot_num; 797 bus_info_ptr1->slot_count += 1; 798 bus_info_ptr1->busno = slot_ptr->slot_bus_num; 799 bus_info_ptr1->index = bus_index++; 800 bus_info_ptr1->current_speed = 0xff; 801 bus_info_ptr1->current_bus_mode = 0xff; 802 803 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id; 804 805 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head); 806 807 } else { 808 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num); 809 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num); 810 bus_info_ptr2->slot_count += 1; 811 812 } 813 814 // end of creating the bus_info linked list 815 816 slot_ptr++; 817 addr_slot += 1; 818 } 819 820 /* init bus structure */ 821 bus_ptr = hpc_ptr->buses; 822 for (bus = 0; bus < bus_num; bus++) { 823 bus_ptr->bus_num = readb(io_mem + addr_bus + bus); 824 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus); 825 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1); 826 827 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2); 828 829 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3); 830 831 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4); 832 833 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num); 834 if (bus_info_ptr2) { 835 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv; 836 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv; 837 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix; 838 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix; 839 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 840 } 841 bus_ptr++; 842 } 843 844 hpc_ptr->ctlr_type = temp; 845 846 switch (hpc_ptr->ctlr_type) { 847 case 1: 848 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr); 849 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1); 850 hpc_ptr->irq = readb(io_mem + addr + 2); 851 addr += 3; 852 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 853 hpc_ptr->u.pci_ctlr.bus, 854 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq); 855 break; 856 857 case 0: 858 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr); 859 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2); 860 if (!request_region(hpc_ptr->u.isa_ctlr.io_start, 861 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1), 862 "ibmphp")) { 863 rc = -ENODEV; 864 goto error_no_hp_slot; 865 } 866 hpc_ptr->irq = readb(io_mem + addr + 4); 867 addr += 5; 868 break; 869 870 case 2: 871 case 4: 872 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr); 873 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4); 874 hpc_ptr->irq = readb(io_mem + addr + 5); 875 addr += 6; 876 break; 877 default: 878 rc = -ENODEV; 879 goto error_no_hp_slot; 880 } 881 882 //reorganize chassis' linked list 883 combine_wpg_for_chassis(); 884 combine_wpg_for_expansion(); 885 hpc_ptr->revision = 0xff; 886 hpc_ptr->options = 0xff; 887 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num; 888 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num; 889 890 // register slots with hpc core as well as create linked list of ibm slot 891 for (index = 0; index < hpc_ptr->slot_count; index++) { 892 893 hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL); 894 if (!hp_slot_ptr) { 895 rc = -ENOMEM; 896 goto error_no_hp_slot; 897 } 898 899 hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); 900 if (!hp_slot_ptr->info) { 901 rc = -ENOMEM; 902 goto error_no_hp_info; 903 } 904 905 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL); 906 if (!tmp_slot) { 907 rc = -ENOMEM; 908 goto error_no_slot; 909 } 910 911 tmp_slot->flag = 1; 912 913 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap; 914 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX) 915 tmp_slot->supported_speed = 3; 916 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX) 917 tmp_slot->supported_speed = 2; 918 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX) 919 tmp_slot->supported_speed = 1; 920 921 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP) 922 tmp_slot->supported_bus_mode = 1; 923 else 924 tmp_slot->supported_bus_mode = 0; 925 926 927 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num; 928 929 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num); 930 if (!bus_info_ptr1) { 931 kfree(tmp_slot); 932 rc = -ENODEV; 933 goto error; 934 } 935 tmp_slot->bus_on = bus_info_ptr1; 936 bus_info_ptr1 = NULL; 937 tmp_slot->ctrl = hpc_ptr; 938 939 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index; 940 tmp_slot->number = hpc_ptr->slots[index].slot_num; 941 tmp_slot->hotplug_slot = hp_slot_ptr; 942 943 hp_slot_ptr->private = tmp_slot; 944 hp_slot_ptr->release = release_slot; 945 946 rc = fillslotinfo(hp_slot_ptr); 947 if (rc) 948 goto error; 949 950 rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private); 951 if (rc) 952 goto error; 953 hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops; 954 955 // end of registering ibm slot with hotplug core 956 957 list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head); 958 } 959 960 print_bus_info(); 961 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head); 962 963 } /* each hpc */ 964 965 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) { 966 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot)); 967 pci_hp_register(tmp_slot->hotplug_slot, 968 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name); 969 } 970 971 print_ebda_hpc(); 972 print_ibm_slot(); 973 return 0; 974 975 error: 976 kfree(hp_slot_ptr->private); 977 error_no_slot: 978 kfree(hp_slot_ptr->info); 979 error_no_hp_info: 980 kfree(hp_slot_ptr); 981 error_no_hp_slot: 982 free_ebda_hpc(hpc_ptr); 983 error_no_hpc: 984 iounmap(io_mem); 985 return rc; 986 } 987 988 /* 989 * map info (bus, devfun, start addr, end addr..) of i/o, memory, 990 * pfm from the physical addr to a list of resource. 991 */ 992 static int __init ebda_rsrc_rsrc(void) 993 { 994 u16 addr; 995 short rsrc; 996 u8 type, rsrc_type; 997 struct ebda_pci_rsrc *rsrc_ptr; 998 999 addr = rsrc_list_ptr->phys_addr; 1000 debug("now entering rsrc land\n"); 1001 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr); 1002 1003 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) { 1004 type = readb(io_mem + addr); 1005 1006 addr += 1; 1007 rsrc_type = type & EBDA_RSRC_TYPE_MASK; 1008 1009 if (rsrc_type == EBDA_IO_RSRC_TYPE) { 1010 rsrc_ptr = alloc_ebda_pci_rsrc(); 1011 if (!rsrc_ptr) { 1012 iounmap(io_mem); 1013 return -ENOMEM; 1014 } 1015 rsrc_ptr->rsrc_type = type; 1016 1017 rsrc_ptr->bus_num = readb(io_mem + addr); 1018 rsrc_ptr->dev_fun = readb(io_mem + addr + 1); 1019 rsrc_ptr->start_addr = readw(io_mem + addr + 2); 1020 rsrc_ptr->end_addr = readw(io_mem + addr + 4); 1021 addr += 6; 1022 1023 debug("rsrc from io type ----\n"); 1024 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 1025 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 1026 1027 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 1028 } 1029 1030 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) { 1031 rsrc_ptr = alloc_ebda_pci_rsrc(); 1032 if (!rsrc_ptr) { 1033 iounmap(io_mem); 1034 return -ENOMEM; 1035 } 1036 rsrc_ptr->rsrc_type = type; 1037 1038 rsrc_ptr->bus_num = readb(io_mem + addr); 1039 rsrc_ptr->dev_fun = readb(io_mem + addr + 1); 1040 rsrc_ptr->start_addr = readl(io_mem + addr + 2); 1041 rsrc_ptr->end_addr = readl(io_mem + addr + 6); 1042 addr += 10; 1043 1044 debug("rsrc from mem or pfm ---\n"); 1045 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 1046 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 1047 1048 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 1049 } 1050 } 1051 kfree(rsrc_list_ptr); 1052 rsrc_list_ptr = NULL; 1053 print_ebda_pci_rsrc(); 1054 return 0; 1055 } 1056 1057 u16 ibmphp_get_total_controllers(void) 1058 { 1059 return hpc_list_ptr->num_ctlrs; 1060 } 1061 1062 struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num) 1063 { 1064 struct slot *slot; 1065 1066 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) { 1067 if (slot->number == physical_num) 1068 return slot; 1069 } 1070 return NULL; 1071 } 1072 1073 /* To find: 1074 * - the smallest slot number 1075 * - the largest slot number 1076 * - the total number of the slots based on each bus 1077 * (if only one slot per bus slot_min = slot_max ) 1078 */ 1079 struct bus_info *ibmphp_find_same_bus_num(u32 num) 1080 { 1081 struct bus_info *ptr; 1082 1083 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 1084 if (ptr->busno == num) 1085 return ptr; 1086 } 1087 return NULL; 1088 } 1089 1090 /* Finding relative bus number, in order to map corresponding 1091 * bus register 1092 */ 1093 int ibmphp_get_bus_index(u8 num) 1094 { 1095 struct bus_info *ptr; 1096 1097 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 1098 if (ptr->busno == num) 1099 return ptr->index; 1100 } 1101 return -ENODEV; 1102 } 1103 1104 void ibmphp_free_bus_info_queue(void) 1105 { 1106 struct bus_info *bus_info, *next; 1107 1108 list_for_each_entry_safe(bus_info, next, &bus_info_head, 1109 bus_info_list) { 1110 kfree (bus_info); 1111 } 1112 } 1113 1114 void ibmphp_free_ebda_hpc_queue(void) 1115 { 1116 struct controller *controller = NULL, *next; 1117 int pci_flag = 0; 1118 1119 list_for_each_entry_safe(controller, next, &ebda_hpc_head, 1120 ebda_hpc_list) { 1121 if (controller->ctlr_type == 0) 1122 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1)); 1123 else if ((controller->ctlr_type == 1) && (!pci_flag)) { 1124 ++pci_flag; 1125 pci_unregister_driver(&ibmphp_driver); 1126 } 1127 free_ebda_hpc(controller); 1128 } 1129 } 1130 1131 void ibmphp_free_ebda_pci_rsrc_queue(void) 1132 { 1133 struct ebda_pci_rsrc *resource, *next; 1134 1135 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head, 1136 ebda_pci_rsrc_list) { 1137 kfree (resource); 1138 resource = NULL; 1139 } 1140 } 1141 1142 static const struct pci_device_id id_table[] = { 1143 { 1144 .vendor = PCI_VENDOR_ID_IBM, 1145 .device = HPC_DEVICE_ID, 1146 .subvendor = PCI_VENDOR_ID_IBM, 1147 .subdevice = HPC_SUBSYSTEM_ID, 1148 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1149 }, {} 1150 }; 1151 1152 MODULE_DEVICE_TABLE(pci, id_table); 1153 1154 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *); 1155 static struct pci_driver ibmphp_driver = { 1156 .name = "ibmphp", 1157 .id_table = id_table, 1158 .probe = ibmphp_probe, 1159 }; 1160 1161 int ibmphp_register_pci(void) 1162 { 1163 struct controller *ctrl; 1164 int rc = 0; 1165 1166 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1167 if (ctrl->ctlr_type == 1) { 1168 rc = pci_register_driver(&ibmphp_driver); 1169 break; 1170 } 1171 } 1172 return rc; 1173 } 1174 static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids) 1175 { 1176 struct controller *ctrl; 1177 1178 debug("inside ibmphp_probe\n"); 1179 1180 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1181 if (ctrl->ctlr_type == 1) { 1182 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) { 1183 ctrl->ctrl_dev = dev; 1184 debug("found device!!!\n"); 1185 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device); 1186 return 0; 1187 } 1188 } 1189 } 1190 return -ENODEV; 1191 } 1192