1 /* 2 * IBM Hot Plug Controller Driver 3 * 4 * Written By: Tong Yu, IBM Corporation 5 * 6 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com) 7 * Copyright (C) 2001-2003 IBM Corp. 8 * 9 * All rights reserved. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 19 * NON INFRINGEMENT. See the GNU General Public License for more 20 * details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * Send feedback to <gregkh@us.ibm.com> 27 * 28 */ 29 30 #include <linux/module.h> 31 #include <linux/errno.h> 32 #include <linux/mm.h> 33 #include <linux/slab.h> 34 #include <linux/pci.h> 35 #include <linux/list.h> 36 #include <linux/init.h> 37 #include "ibmphp.h" 38 39 /* 40 * POST builds data blocks(in this data block definition, a char-1 41 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended 42 * BIOS Data Area which describe the configuration of the hot-plug 43 * controllers and resources used by the PCI Hot-Plug devices. 44 * 45 * This file walks EBDA, maps data block from physical addr, 46 * reconstruct linked lists about all system resource(MEM, PFM, IO) 47 * already assigned by POST, as well as linked lists about hot plug 48 * controllers (ctlr#, slot#, bus&slot features...) 49 */ 50 51 /* Global lists */ 52 LIST_HEAD (ibmphp_ebda_pci_rsrc_head); 53 LIST_HEAD (ibmphp_slot_head); 54 55 /* Local variables */ 56 static struct ebda_hpc_list *hpc_list_ptr; 57 static struct ebda_rsrc_list *rsrc_list_ptr; 58 static struct rio_table_hdr *rio_table_ptr = NULL; 59 static LIST_HEAD (ebda_hpc_head); 60 static LIST_HEAD (bus_info_head); 61 static LIST_HEAD (rio_vg_head); 62 static LIST_HEAD (rio_lo_head); 63 static LIST_HEAD (opt_vg_head); 64 static LIST_HEAD (opt_lo_head); 65 static void __iomem *io_mem; 66 67 /* Local functions */ 68 static int ebda_rsrc_controller (void); 69 static int ebda_rsrc_rsrc (void); 70 static int ebda_rio_table (void); 71 72 static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void) 73 { 74 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL); 75 } 76 77 static struct controller *alloc_ebda_hpc (u32 slot_count, u32 bus_count) 78 { 79 struct controller *controller; 80 struct ebda_hpc_slot *slots; 81 struct ebda_hpc_bus *buses; 82 83 controller = kzalloc(sizeof(struct controller), GFP_KERNEL); 84 if (!controller) 85 goto error; 86 87 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL); 88 if (!slots) 89 goto error_contr; 90 controller->slots = slots; 91 92 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL); 93 if (!buses) 94 goto error_slots; 95 controller->buses = buses; 96 97 return controller; 98 error_slots: 99 kfree(controller->slots); 100 error_contr: 101 kfree(controller); 102 error: 103 return NULL; 104 } 105 106 static void free_ebda_hpc (struct controller *controller) 107 { 108 kfree (controller->slots); 109 kfree (controller->buses); 110 kfree (controller); 111 } 112 113 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void) 114 { 115 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL); 116 } 117 118 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void) 119 { 120 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL); 121 } 122 123 static void __init print_bus_info (void) 124 { 125 struct bus_info *ptr; 126 127 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 128 debug ("%s - slot_min = %x\n", __func__, ptr->slot_min); 129 debug ("%s - slot_max = %x\n", __func__, ptr->slot_max); 130 debug ("%s - slot_count = %x\n", __func__, ptr->slot_count); 131 debug ("%s - bus# = %x\n", __func__, ptr->busno); 132 debug ("%s - current_speed = %x\n", __func__, ptr->current_speed); 133 debug ("%s - controller_id = %x\n", __func__, ptr->controller_id); 134 135 debug ("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv); 136 debug ("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv); 137 debug ("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix); 138 debug ("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix); 139 debug ("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix); 140 141 } 142 } 143 144 static void print_lo_info (void) 145 { 146 struct rio_detail *ptr; 147 debug ("print_lo_info ----\n"); 148 list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) { 149 debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id); 150 debug ("%s - rio_type = %x\n", __func__, ptr->rio_type); 151 debug ("%s - owner_id = %x\n", __func__, ptr->owner_id); 152 debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num); 153 debug ("%s - wpindex = %x\n", __func__, ptr->wpindex); 154 debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num); 155 156 } 157 } 158 159 static void print_vg_info (void) 160 { 161 struct rio_detail *ptr; 162 debug ("%s ---\n", __func__); 163 list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) { 164 debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id); 165 debug ("%s - rio_type = %x\n", __func__, ptr->rio_type); 166 debug ("%s - owner_id = %x\n", __func__, ptr->owner_id); 167 debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num); 168 debug ("%s - wpindex = %x\n", __func__, ptr->wpindex); 169 debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num); 170 171 } 172 } 173 174 static void __init print_ebda_pci_rsrc (void) 175 { 176 struct ebda_pci_rsrc *ptr; 177 178 list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) { 179 debug ("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 180 __func__, ptr->rsrc_type ,ptr->bus_num, ptr->dev_fun,ptr->start_addr, ptr->end_addr); 181 } 182 } 183 184 static void __init print_ibm_slot (void) 185 { 186 struct slot *ptr; 187 188 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) { 189 debug ("%s - slot_number: %x\n", __func__, ptr->number); 190 } 191 } 192 193 static void __init print_opt_vg (void) 194 { 195 struct opt_rio *ptr; 196 debug ("%s ---\n", __func__); 197 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) { 198 debug ("%s - rio_type %x\n", __func__, ptr->rio_type); 199 debug ("%s - chassis_num: %x\n", __func__, ptr->chassis_num); 200 debug ("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num); 201 debug ("%s - middle_num: %x\n", __func__, ptr->middle_num); 202 } 203 } 204 205 static void __init print_ebda_hpc (void) 206 { 207 struct controller *hpc_ptr; 208 u16 index; 209 210 list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) { 211 for (index = 0; index < hpc_ptr->slot_count; index++) { 212 debug ("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num); 213 debug ("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num); 214 debug ("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index); 215 debug ("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap); 216 } 217 218 for (index = 0; index < hpc_ptr->bus_count; index++) 219 debug ("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num); 220 221 debug ("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type); 222 switch (hpc_ptr->ctlr_type) { 223 case 1: 224 debug ("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus); 225 debug ("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun); 226 debug ("%s - irq: %x\n", __func__, hpc_ptr->irq); 227 break; 228 229 case 0: 230 debug ("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start); 231 debug ("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end); 232 debug ("%s - irq: %x\n", __func__, hpc_ptr->irq); 233 break; 234 235 case 2: 236 case 4: 237 debug ("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar); 238 debug ("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr); 239 debug ("%s - irq: %x\n", __func__, hpc_ptr->irq); 240 break; 241 } 242 } 243 } 244 245 int __init ibmphp_access_ebda (void) 246 { 247 u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz; 248 u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base; 249 int rc = 0; 250 251 252 rio_complete = 0; 253 hs_complete = 0; 254 255 io_mem = ioremap ((0x40 << 4) + 0x0e, 2); 256 if (!io_mem ) 257 return -ENOMEM; 258 ebda_seg = readw (io_mem); 259 iounmap (io_mem); 260 debug ("returned ebda segment: %x\n", ebda_seg); 261 262 io_mem = ioremap(ebda_seg<<4, 1); 263 if (!io_mem) 264 return -ENOMEM; 265 ebda_sz = readb(io_mem); 266 iounmap(io_mem); 267 debug("ebda size: %d(KiB)\n", ebda_sz); 268 if (ebda_sz == 0) 269 return -ENOMEM; 270 271 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024)); 272 if (!io_mem ) 273 return -ENOMEM; 274 next_offset = 0x180; 275 276 for (;;) { 277 offset = next_offset; 278 279 /* Make sure what we read is still in the mapped section */ 280 if (WARN(offset > (ebda_sz * 1024 - 4), 281 "ibmphp_ebda: next read is beyond ebda_sz\n")) 282 break; 283 284 next_offset = readw (io_mem + offset); /* offset of next blk */ 285 286 offset += 2; 287 if (next_offset == 0) /* 0 indicate it's last blk */ 288 break; 289 blk_id = readw (io_mem + offset); /* this blk id */ 290 291 offset += 2; 292 /* check if it is hot swap block or rio block */ 293 if (blk_id != 0x4853 && blk_id != 0x4752) 294 continue; 295 /* found hs table */ 296 if (blk_id == 0x4853) { 297 debug ("now enter hot swap block---\n"); 298 debug ("hot blk id: %x\n", blk_id); 299 format = readb (io_mem + offset); 300 301 offset += 1; 302 if (format != 4) 303 goto error_nodev; 304 debug ("hot blk format: %x\n", format); 305 /* hot swap sub blk */ 306 base = offset; 307 308 sub_addr = base; 309 re = readw (io_mem + sub_addr); /* next sub blk */ 310 311 sub_addr += 2; 312 rc_id = readw (io_mem + sub_addr); /* sub blk id */ 313 314 sub_addr += 2; 315 if (rc_id != 0x5243) 316 goto error_nodev; 317 /* rc sub blk signature */ 318 num_ctlrs = readb (io_mem + sub_addr); 319 320 sub_addr += 1; 321 hpc_list_ptr = alloc_ebda_hpc_list (); 322 if (!hpc_list_ptr) { 323 rc = -ENOMEM; 324 goto out; 325 } 326 hpc_list_ptr->format = format; 327 hpc_list_ptr->num_ctlrs = num_ctlrs; 328 hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */ 329 debug ("info about hpc descriptor---\n"); 330 debug ("hot blk format: %x\n", format); 331 debug ("num of controller: %x\n", num_ctlrs); 332 debug ("offset of hpc data structure entries: %x\n ", sub_addr); 333 334 sub_addr = base + re; /* re sub blk */ 335 /* FIXME: rc is never used/checked */ 336 rc = readw (io_mem + sub_addr); /* next sub blk */ 337 338 sub_addr += 2; 339 re_id = readw (io_mem + sub_addr); /* sub blk id */ 340 341 sub_addr += 2; 342 if (re_id != 0x5245) 343 goto error_nodev; 344 345 /* signature of re */ 346 num_entries = readw (io_mem + sub_addr); 347 348 sub_addr += 2; /* offset of RSRC_ENTRIES blk */ 349 rsrc_list_ptr = alloc_ebda_rsrc_list (); 350 if (!rsrc_list_ptr ) { 351 rc = -ENOMEM; 352 goto out; 353 } 354 rsrc_list_ptr->format = format; 355 rsrc_list_ptr->num_entries = num_entries; 356 rsrc_list_ptr->phys_addr = sub_addr; 357 358 debug ("info about rsrc descriptor---\n"); 359 debug ("format: %x\n", format); 360 debug ("num of rsrc: %x\n", num_entries); 361 debug ("offset of rsrc data structure entries: %x\n ", sub_addr); 362 363 hs_complete = 1; 364 } else { 365 /* found rio table, blk_id == 0x4752 */ 366 debug ("now enter io table ---\n"); 367 debug ("rio blk id: %x\n", blk_id); 368 369 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL); 370 if (!rio_table_ptr) { 371 rc = -ENOMEM; 372 goto out; 373 } 374 rio_table_ptr->ver_num = readb (io_mem + offset); 375 rio_table_ptr->scal_count = readb (io_mem + offset + 1); 376 rio_table_ptr->riodev_count = readb (io_mem + offset + 2); 377 rio_table_ptr->offset = offset +3 ; 378 379 debug("info about rio table hdr ---\n"); 380 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ", 381 rio_table_ptr->ver_num, rio_table_ptr->scal_count, 382 rio_table_ptr->riodev_count, rio_table_ptr->offset); 383 384 rio_complete = 1; 385 } 386 } 387 388 if (!hs_complete && !rio_complete) 389 goto error_nodev; 390 391 if (rio_table_ptr) { 392 if (rio_complete && rio_table_ptr->ver_num == 3) { 393 rc = ebda_rio_table (); 394 if (rc) 395 goto out; 396 } 397 } 398 rc = ebda_rsrc_controller (); 399 if (rc) 400 goto out; 401 402 rc = ebda_rsrc_rsrc (); 403 goto out; 404 error_nodev: 405 rc = -ENODEV; 406 out: 407 iounmap (io_mem); 408 return rc; 409 } 410 411 /* 412 * map info of scalability details and rio details from physical address 413 */ 414 static int __init ebda_rio_table (void) 415 { 416 u16 offset; 417 u8 i; 418 struct rio_detail *rio_detail_ptr; 419 420 offset = rio_table_ptr->offset; 421 offset += 12 * rio_table_ptr->scal_count; 422 423 // we do concern about rio details 424 for (i = 0; i < rio_table_ptr->riodev_count; i++) { 425 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL); 426 if (!rio_detail_ptr) 427 return -ENOMEM; 428 rio_detail_ptr->rio_node_id = readb (io_mem + offset); 429 rio_detail_ptr->bbar = readl (io_mem + offset + 1); 430 rio_detail_ptr->rio_type = readb (io_mem + offset + 5); 431 rio_detail_ptr->owner_id = readb (io_mem + offset + 6); 432 rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7); 433 rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8); 434 rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9); 435 rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10); 436 rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11); 437 rio_detail_ptr->status = readb (io_mem + offset + 12); 438 rio_detail_ptr->wpindex = readb (io_mem + offset + 13); 439 rio_detail_ptr->chassis_num = readb (io_mem + offset + 14); 440 // 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); 441 //create linked list of chassis 442 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5) 443 list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head); 444 //create linked list of expansion box 445 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7) 446 list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head); 447 else 448 // not in my concern 449 kfree (rio_detail_ptr); 450 offset += 15; 451 } 452 print_lo_info (); 453 print_vg_info (); 454 return 0; 455 } 456 457 /* 458 * reorganizing linked list of chassis 459 */ 460 static struct opt_rio *search_opt_vg (u8 chassis_num) 461 { 462 struct opt_rio *ptr; 463 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) { 464 if (ptr->chassis_num == chassis_num) 465 return ptr; 466 } 467 return NULL; 468 } 469 470 static int __init combine_wpg_for_chassis (void) 471 { 472 struct opt_rio *opt_rio_ptr = NULL; 473 struct rio_detail *rio_detail_ptr = NULL; 474 475 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) { 476 opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num); 477 if (!opt_rio_ptr) { 478 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL); 479 if (!opt_rio_ptr) 480 return -ENOMEM; 481 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type; 482 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num; 483 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num; 484 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num; 485 list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head); 486 } else { 487 opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num); 488 opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num); 489 } 490 } 491 print_opt_vg (); 492 return 0; 493 } 494 495 /* 496 * reorganizing linked list of expansion box 497 */ 498 static struct opt_rio_lo *search_opt_lo (u8 chassis_num) 499 { 500 struct opt_rio_lo *ptr; 501 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) { 502 if (ptr->chassis_num == chassis_num) 503 return ptr; 504 } 505 return NULL; 506 } 507 508 static int combine_wpg_for_expansion (void) 509 { 510 struct opt_rio_lo *opt_rio_lo_ptr = NULL; 511 struct rio_detail *rio_detail_ptr = NULL; 512 513 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) { 514 opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num); 515 if (!opt_rio_lo_ptr) { 516 opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL); 517 if (!opt_rio_lo_ptr) 518 return -ENOMEM; 519 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type; 520 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num; 521 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num; 522 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num; 523 opt_rio_lo_ptr->pack_count = 1; 524 525 list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head); 526 } else { 527 opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num); 528 opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num); 529 opt_rio_lo_ptr->pack_count = 2; 530 } 531 } 532 return 0; 533 } 534 535 536 /* Since we don't know the max slot number per each chassis, hence go 537 * through the list of all chassis to find out the range 538 * Arguments: slot_num, 1st slot number of the chassis we think we are on, 539 * var (0 = chassis, 1 = expansion box) 540 */ 541 static int first_slot_num (u8 slot_num, u8 first_slot, u8 var) 542 { 543 struct opt_rio *opt_vg_ptr = NULL; 544 struct opt_rio_lo *opt_lo_ptr = NULL; 545 int rc = 0; 546 547 if (!var) { 548 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) { 549 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) { 550 rc = -ENODEV; 551 break; 552 } 553 } 554 } else { 555 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) { 556 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) { 557 rc = -ENODEV; 558 break; 559 } 560 } 561 } 562 return rc; 563 } 564 565 static struct opt_rio_lo *find_rxe_num (u8 slot_num) 566 { 567 struct opt_rio_lo *opt_lo_ptr; 568 569 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) { 570 //check to see if this slot_num belongs to expansion box 571 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1))) 572 return opt_lo_ptr; 573 } 574 return NULL; 575 } 576 577 static struct opt_rio *find_chassis_num (u8 slot_num) 578 { 579 struct opt_rio *opt_vg_ptr; 580 581 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) { 582 //check to see if this slot_num belongs to chassis 583 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0))) 584 return opt_vg_ptr; 585 } 586 return NULL; 587 } 588 589 /* This routine will find out how many slots are in the chassis, so that 590 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc 591 */ 592 static u8 calculate_first_slot (u8 slot_num) 593 { 594 u8 first_slot = 1; 595 struct slot *slot_cur; 596 597 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { 598 if (slot_cur->ctrl) { 599 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num)) 600 first_slot = slot_cur->ctrl->ending_slot_num; 601 } 602 } 603 return first_slot + 1; 604 605 } 606 607 #define SLOT_NAME_SIZE 30 608 609 static char *create_file_name (struct slot *slot_cur) 610 { 611 struct opt_rio *opt_vg_ptr = NULL; 612 struct opt_rio_lo *opt_lo_ptr = NULL; 613 static char str[SLOT_NAME_SIZE]; 614 int which = 0; /* rxe = 1, chassis = 0 */ 615 u8 number = 1; /* either chassis or rxe # */ 616 u8 first_slot = 1; 617 u8 slot_num; 618 u8 flag = 0; 619 620 if (!slot_cur) { 621 err ("Structure passed is empty\n"); 622 return NULL; 623 } 624 625 slot_num = slot_cur->number; 626 627 memset (str, 0, sizeof(str)); 628 629 if (rio_table_ptr) { 630 if (rio_table_ptr->ver_num == 3) { 631 opt_vg_ptr = find_chassis_num (slot_num); 632 opt_lo_ptr = find_rxe_num (slot_num); 633 } 634 } 635 if (opt_vg_ptr) { 636 if (opt_lo_ptr) { 637 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) { 638 number = opt_lo_ptr->chassis_num; 639 first_slot = opt_lo_ptr->first_slot_num; 640 which = 1; /* it is RXE */ 641 } else { 642 first_slot = opt_vg_ptr->first_slot_num; 643 number = opt_vg_ptr->chassis_num; 644 which = 0; 645 } 646 } else { 647 first_slot = opt_vg_ptr->first_slot_num; 648 number = opt_vg_ptr->chassis_num; 649 which = 0; 650 } 651 ++flag; 652 } else if (opt_lo_ptr) { 653 number = opt_lo_ptr->chassis_num; 654 first_slot = opt_lo_ptr->first_slot_num; 655 which = 1; 656 ++flag; 657 } else if (rio_table_ptr) { 658 if (rio_table_ptr->ver_num == 3) { 659 /* if both NULL and we DO have correct RIO table in BIOS */ 660 return NULL; 661 } 662 } 663 if (!flag) { 664 if (slot_cur->ctrl->ctlr_type == 4) { 665 first_slot = calculate_first_slot (slot_num); 666 which = 1; 667 } else { 668 which = 0; 669 } 670 } 671 672 sprintf(str, "%s%dslot%d", 673 which == 0 ? "chassis" : "rxe", 674 number, slot_num - first_slot + 1); 675 return str; 676 } 677 678 static int fillslotinfo(struct hotplug_slot *hotplug_slot) 679 { 680 struct slot *slot; 681 int rc = 0; 682 683 if (!hotplug_slot || !hotplug_slot->private) 684 return -EINVAL; 685 686 slot = hotplug_slot->private; 687 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL); 688 if (rc) 689 return rc; 690 691 // power - enabled:1 not:0 692 hotplug_slot->info->power_status = SLOT_POWER(slot->status); 693 694 // attention - off:0, on:1, blinking:2 695 hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status); 696 697 // latch - open:1 closed:0 698 hotplug_slot->info->latch_status = SLOT_LATCH(slot->status); 699 700 // pci board - present:1 not:0 701 if (SLOT_PRESENT (slot->status)) 702 hotplug_slot->info->adapter_status = 1; 703 else 704 hotplug_slot->info->adapter_status = 0; 705 /* 706 if (slot->bus_on->supported_bus_mode 707 && (slot->bus_on->supported_speed == BUS_SPEED_66)) 708 hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX; 709 else 710 hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed; 711 */ 712 713 return rc; 714 } 715 716 static void release_slot(struct hotplug_slot *hotplug_slot) 717 { 718 struct slot *slot; 719 720 if (!hotplug_slot || !hotplug_slot->private) 721 return; 722 723 slot = hotplug_slot->private; 724 kfree(slot->hotplug_slot->info); 725 kfree(slot->hotplug_slot); 726 slot->ctrl = NULL; 727 slot->bus_on = NULL; 728 729 /* we don't want to actually remove the resources, since free_resources will do just that */ 730 ibmphp_unconfigure_card(&slot, -1); 731 732 kfree (slot); 733 } 734 735 static struct pci_driver ibmphp_driver; 736 737 /* 738 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of 739 * each hpc from physical address to a list of hot plug controllers based on 740 * hpc descriptors. 741 */ 742 static int __init ebda_rsrc_controller (void) 743 { 744 u16 addr, addr_slot, addr_bus; 745 u8 ctlr_id, temp, bus_index; 746 u16 ctlr, slot, bus; 747 u16 slot_num, bus_num, index; 748 struct hotplug_slot *hp_slot_ptr; 749 struct controller *hpc_ptr; 750 struct ebda_hpc_bus *bus_ptr; 751 struct ebda_hpc_slot *slot_ptr; 752 struct bus_info *bus_info_ptr1, *bus_info_ptr2; 753 int rc; 754 struct slot *tmp_slot; 755 char name[SLOT_NAME_SIZE]; 756 757 addr = hpc_list_ptr->phys_addr; 758 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) { 759 bus_index = 1; 760 ctlr_id = readb (io_mem + addr); 761 addr += 1; 762 slot_num = readb (io_mem + addr); 763 764 addr += 1; 765 addr_slot = addr; /* offset of slot structure */ 766 addr += (slot_num * 4); 767 768 bus_num = readb (io_mem + addr); 769 770 addr += 1; 771 addr_bus = addr; /* offset of bus */ 772 addr += (bus_num * 9); /* offset of ctlr_type */ 773 temp = readb (io_mem + addr); 774 775 addr += 1; 776 /* init hpc structure */ 777 hpc_ptr = alloc_ebda_hpc (slot_num, bus_num); 778 if (!hpc_ptr ) { 779 rc = -ENOMEM; 780 goto error_no_hpc; 781 } 782 hpc_ptr->ctlr_id = ctlr_id; 783 hpc_ptr->ctlr_relative_id = ctlr; 784 hpc_ptr->slot_count = slot_num; 785 hpc_ptr->bus_count = bus_num; 786 debug ("now enter ctlr data structure ---\n"); 787 debug ("ctlr id: %x\n", ctlr_id); 788 debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id); 789 debug ("count of slots controlled by this ctlr: %x\n", slot_num); 790 debug ("count of buses controlled by this ctlr: %x\n", bus_num); 791 792 /* init slot structure, fetch slot, bus, cap... */ 793 slot_ptr = hpc_ptr->slots; 794 for (slot = 0; slot < slot_num; slot++) { 795 slot_ptr->slot_num = readb (io_mem + addr_slot); 796 slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num); 797 slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num); 798 slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num); 799 800 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max 801 802 bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num); 803 if (!bus_info_ptr2) { 804 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL); 805 if (!bus_info_ptr1) { 806 rc = -ENOMEM; 807 goto error_no_hp_slot; 808 } 809 bus_info_ptr1->slot_min = slot_ptr->slot_num; 810 bus_info_ptr1->slot_max = slot_ptr->slot_num; 811 bus_info_ptr1->slot_count += 1; 812 bus_info_ptr1->busno = slot_ptr->slot_bus_num; 813 bus_info_ptr1->index = bus_index++; 814 bus_info_ptr1->current_speed = 0xff; 815 bus_info_ptr1->current_bus_mode = 0xff; 816 817 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id; 818 819 list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head); 820 821 } else { 822 bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num); 823 bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num); 824 bus_info_ptr2->slot_count += 1; 825 826 } 827 828 // end of creating the bus_info linked list 829 830 slot_ptr++; 831 addr_slot += 1; 832 } 833 834 /* init bus structure */ 835 bus_ptr = hpc_ptr->buses; 836 for (bus = 0; bus < bus_num; bus++) { 837 bus_ptr->bus_num = readb (io_mem + addr_bus + bus); 838 bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus); 839 bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1); 840 841 bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2); 842 843 bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3); 844 845 bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4); 846 847 bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num); 848 if (bus_info_ptr2) { 849 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv; 850 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv; 851 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix; 852 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix; 853 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 854 } 855 bus_ptr++; 856 } 857 858 hpc_ptr->ctlr_type = temp; 859 860 switch (hpc_ptr->ctlr_type) { 861 case 1: 862 hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr); 863 hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1); 864 hpc_ptr->irq = readb (io_mem + addr + 2); 865 addr += 3; 866 debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 867 hpc_ptr->u.pci_ctlr.bus, 868 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq); 869 break; 870 871 case 0: 872 hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr); 873 hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2); 874 if (!request_region (hpc_ptr->u.isa_ctlr.io_start, 875 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1), 876 "ibmphp")) { 877 rc = -ENODEV; 878 goto error_no_hp_slot; 879 } 880 hpc_ptr->irq = readb (io_mem + addr + 4); 881 addr += 5; 882 break; 883 884 case 2: 885 case 4: 886 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr); 887 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4); 888 hpc_ptr->irq = readb (io_mem + addr + 5); 889 addr += 6; 890 break; 891 default: 892 rc = -ENODEV; 893 goto error_no_hp_slot; 894 } 895 896 //reorganize chassis' linked list 897 combine_wpg_for_chassis (); 898 combine_wpg_for_expansion (); 899 hpc_ptr->revision = 0xff; 900 hpc_ptr->options = 0xff; 901 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num; 902 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num; 903 904 // register slots with hpc core as well as create linked list of ibm slot 905 for (index = 0; index < hpc_ptr->slot_count; index++) { 906 907 hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL); 908 if (!hp_slot_ptr) { 909 rc = -ENOMEM; 910 goto error_no_hp_slot; 911 } 912 913 hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); 914 if (!hp_slot_ptr->info) { 915 rc = -ENOMEM; 916 goto error_no_hp_info; 917 } 918 919 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL); 920 if (!tmp_slot) { 921 rc = -ENOMEM; 922 goto error_no_slot; 923 } 924 925 tmp_slot->flag = 1; 926 927 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap; 928 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX) 929 tmp_slot->supported_speed = 3; 930 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX) 931 tmp_slot->supported_speed = 2; 932 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX) 933 tmp_slot->supported_speed = 1; 934 935 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP) 936 tmp_slot->supported_bus_mode = 1; 937 else 938 tmp_slot->supported_bus_mode = 0; 939 940 941 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num; 942 943 bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num); 944 if (!bus_info_ptr1) { 945 kfree(tmp_slot); 946 rc = -ENODEV; 947 goto error; 948 } 949 tmp_slot->bus_on = bus_info_ptr1; 950 bus_info_ptr1 = NULL; 951 tmp_slot->ctrl = hpc_ptr; 952 953 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index; 954 tmp_slot->number = hpc_ptr->slots[index].slot_num; 955 tmp_slot->hotplug_slot = hp_slot_ptr; 956 957 hp_slot_ptr->private = tmp_slot; 958 hp_slot_ptr->release = release_slot; 959 960 rc = fillslotinfo(hp_slot_ptr); 961 if (rc) 962 goto error; 963 964 rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private); 965 if (rc) 966 goto error; 967 hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops; 968 969 // end of registering ibm slot with hotplug core 970 971 list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head); 972 } 973 974 print_bus_info (); 975 list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head ); 976 977 } /* each hpc */ 978 979 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) { 980 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot)); 981 pci_hp_register(tmp_slot->hotplug_slot, 982 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name); 983 } 984 985 print_ebda_hpc (); 986 print_ibm_slot (); 987 return 0; 988 989 error: 990 kfree (hp_slot_ptr->private); 991 error_no_slot: 992 kfree (hp_slot_ptr->info); 993 error_no_hp_info: 994 kfree (hp_slot_ptr); 995 error_no_hp_slot: 996 free_ebda_hpc (hpc_ptr); 997 error_no_hpc: 998 iounmap (io_mem); 999 return rc; 1000 } 1001 1002 /* 1003 * map info (bus, devfun, start addr, end addr..) of i/o, memory, 1004 * pfm from the physical addr to a list of resource. 1005 */ 1006 static int __init ebda_rsrc_rsrc (void) 1007 { 1008 u16 addr; 1009 short rsrc; 1010 u8 type, rsrc_type; 1011 struct ebda_pci_rsrc *rsrc_ptr; 1012 1013 addr = rsrc_list_ptr->phys_addr; 1014 debug ("now entering rsrc land\n"); 1015 debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr); 1016 1017 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) { 1018 type = readb (io_mem + addr); 1019 1020 addr += 1; 1021 rsrc_type = type & EBDA_RSRC_TYPE_MASK; 1022 1023 if (rsrc_type == EBDA_IO_RSRC_TYPE) { 1024 rsrc_ptr = alloc_ebda_pci_rsrc (); 1025 if (!rsrc_ptr) { 1026 iounmap (io_mem); 1027 return -ENOMEM; 1028 } 1029 rsrc_ptr->rsrc_type = type; 1030 1031 rsrc_ptr->bus_num = readb (io_mem + addr); 1032 rsrc_ptr->dev_fun = readb (io_mem + addr + 1); 1033 rsrc_ptr->start_addr = readw (io_mem + addr + 2); 1034 rsrc_ptr->end_addr = readw (io_mem + addr + 4); 1035 addr += 6; 1036 1037 debug ("rsrc from io type ----\n"); 1038 debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 1039 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 1040 1041 list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 1042 } 1043 1044 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) { 1045 rsrc_ptr = alloc_ebda_pci_rsrc (); 1046 if (!rsrc_ptr ) { 1047 iounmap (io_mem); 1048 return -ENOMEM; 1049 } 1050 rsrc_ptr->rsrc_type = type; 1051 1052 rsrc_ptr->bus_num = readb (io_mem + addr); 1053 rsrc_ptr->dev_fun = readb (io_mem + addr + 1); 1054 rsrc_ptr->start_addr = readl (io_mem + addr + 2); 1055 rsrc_ptr->end_addr = readl (io_mem + addr + 6); 1056 addr += 10; 1057 1058 debug ("rsrc from mem or pfm ---\n"); 1059 debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 1060 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 1061 1062 list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 1063 } 1064 } 1065 kfree (rsrc_list_ptr); 1066 rsrc_list_ptr = NULL; 1067 print_ebda_pci_rsrc (); 1068 return 0; 1069 } 1070 1071 u16 ibmphp_get_total_controllers (void) 1072 { 1073 return hpc_list_ptr->num_ctlrs; 1074 } 1075 1076 struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num) 1077 { 1078 struct slot *slot; 1079 1080 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) { 1081 if (slot->number == physical_num) 1082 return slot; 1083 } 1084 return NULL; 1085 } 1086 1087 /* To find: 1088 * - the smallest slot number 1089 * - the largest slot number 1090 * - the total number of the slots based on each bus 1091 * (if only one slot per bus slot_min = slot_max ) 1092 */ 1093 struct bus_info *ibmphp_find_same_bus_num (u32 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; 1100 } 1101 return NULL; 1102 } 1103 1104 /* Finding relative bus number, in order to map corresponding 1105 * bus register 1106 */ 1107 int ibmphp_get_bus_index (u8 num) 1108 { 1109 struct bus_info *ptr; 1110 1111 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 1112 if (ptr->busno == num) 1113 return ptr->index; 1114 } 1115 return -ENODEV; 1116 } 1117 1118 void ibmphp_free_bus_info_queue (void) 1119 { 1120 struct bus_info *bus_info; 1121 struct list_head *list; 1122 struct list_head *next; 1123 1124 list_for_each_safe (list, next, &bus_info_head ) { 1125 bus_info = list_entry (list, struct bus_info, bus_info_list); 1126 kfree (bus_info); 1127 } 1128 } 1129 1130 void ibmphp_free_ebda_hpc_queue (void) 1131 { 1132 struct controller *controller = NULL; 1133 struct list_head *list; 1134 struct list_head *next; 1135 int pci_flag = 0; 1136 1137 list_for_each_safe (list, next, &ebda_hpc_head) { 1138 controller = list_entry (list, struct controller, ebda_hpc_list); 1139 if (controller->ctlr_type == 0) 1140 release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1)); 1141 else if ((controller->ctlr_type == 1) && (!pci_flag)) { 1142 ++pci_flag; 1143 pci_unregister_driver (&ibmphp_driver); 1144 } 1145 free_ebda_hpc (controller); 1146 } 1147 } 1148 1149 void ibmphp_free_ebda_pci_rsrc_queue (void) 1150 { 1151 struct ebda_pci_rsrc *resource; 1152 struct list_head *list; 1153 struct list_head *next; 1154 1155 list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) { 1156 resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list); 1157 kfree (resource); 1158 resource = NULL; 1159 } 1160 } 1161 1162 static struct pci_device_id id_table[] = { 1163 { 1164 .vendor = PCI_VENDOR_ID_IBM, 1165 .device = HPC_DEVICE_ID, 1166 .subvendor = PCI_VENDOR_ID_IBM, 1167 .subdevice = HPC_SUBSYSTEM_ID, 1168 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1169 }, {} 1170 }; 1171 1172 MODULE_DEVICE_TABLE(pci, id_table); 1173 1174 static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *); 1175 static struct pci_driver ibmphp_driver = { 1176 .name = "ibmphp", 1177 .id_table = id_table, 1178 .probe = ibmphp_probe, 1179 }; 1180 1181 int ibmphp_register_pci (void) 1182 { 1183 struct controller *ctrl; 1184 int rc = 0; 1185 1186 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1187 if (ctrl->ctlr_type == 1) { 1188 rc = pci_register_driver(&ibmphp_driver); 1189 break; 1190 } 1191 } 1192 return rc; 1193 } 1194 static int ibmphp_probe (struct pci_dev *dev, const struct pci_device_id *ids) 1195 { 1196 struct controller *ctrl; 1197 1198 debug ("inside ibmphp_probe\n"); 1199 1200 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1201 if (ctrl->ctlr_type == 1) { 1202 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) { 1203 ctrl->ctrl_dev = dev; 1204 debug ("found device!!!\n"); 1205 debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device); 1206 return 0; 1207 } 1208 } 1209 } 1210 return -ENODEV; 1211 } 1212