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_obj(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_obj(struct controller, GFP_KERNEL); 70 if (!controller) 71 goto error; 72 73 slots = kzalloc_objs(struct ebda_hpc_slot, slot_count, GFP_KERNEL); 74 if (!slots) 75 goto error_contr; 76 controller->slots = slots; 77 78 buses = kzalloc_objs(struct ebda_hpc_bus, bus_count, 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_obj(struct ebda_rsrc_list, GFP_KERNEL); 102 } 103 104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void) 105 { 106 return kzalloc_obj(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_obj(struct rio_table_hdr, 356 GFP_KERNEL); 357 if (!rio_table_ptr) { 358 rc = -ENOMEM; 359 goto out; 360 } 361 rio_table_ptr->ver_num = readb(io_mem + offset); 362 rio_table_ptr->scal_count = readb(io_mem + offset + 1); 363 rio_table_ptr->riodev_count = readb(io_mem + offset + 2); 364 rio_table_ptr->offset = offset + 3 ; 365 366 debug("info about rio table hdr ---\n"); 367 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ", 368 rio_table_ptr->ver_num, rio_table_ptr->scal_count, 369 rio_table_ptr->riodev_count, rio_table_ptr->offset); 370 371 rio_complete = 1; 372 } 373 } 374 375 if (!hs_complete && !rio_complete) 376 goto error_nodev; 377 378 if (rio_table_ptr) { 379 if (rio_complete && rio_table_ptr->ver_num == 3) { 380 rc = ebda_rio_table(); 381 if (rc) 382 goto out; 383 } 384 } 385 rc = ebda_rsrc_controller(); 386 if (rc) 387 goto out; 388 389 rc = ebda_rsrc_rsrc(); 390 goto out; 391 error_nodev: 392 rc = -ENODEV; 393 out: 394 iounmap(io_mem); 395 return rc; 396 } 397 398 /* 399 * map info of scalability details and rio details from physical address 400 */ 401 static int __init ebda_rio_table(void) 402 { 403 u16 offset; 404 u8 i; 405 struct rio_detail *rio_detail_ptr; 406 407 offset = rio_table_ptr->offset; 408 offset += 12 * rio_table_ptr->scal_count; 409 410 // we do concern about rio details 411 for (i = 0; i < rio_table_ptr->riodev_count; i++) { 412 rio_detail_ptr = kzalloc_obj(struct rio_detail, GFP_KERNEL); 413 if (!rio_detail_ptr) 414 return -ENOMEM; 415 rio_detail_ptr->rio_node_id = readb(io_mem + offset); 416 rio_detail_ptr->bbar = readl(io_mem + offset + 1); 417 rio_detail_ptr->rio_type = readb(io_mem + offset + 5); 418 rio_detail_ptr->owner_id = readb(io_mem + offset + 6); 419 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7); 420 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8); 421 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9); 422 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10); 423 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11); 424 rio_detail_ptr->status = readb(io_mem + offset + 12); 425 rio_detail_ptr->wpindex = readb(io_mem + offset + 13); 426 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14); 427 // 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); 428 //create linked list of chassis 429 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5) 430 list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head); 431 //create linked list of expansion box 432 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7) 433 list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head); 434 else 435 // not in my concern 436 kfree(rio_detail_ptr); 437 offset += 15; 438 } 439 print_lo_info(); 440 print_vg_info(); 441 return 0; 442 } 443 444 /* 445 * reorganizing linked list of chassis 446 */ 447 static struct opt_rio *search_opt_vg(u8 chassis_num) 448 { 449 struct opt_rio *ptr; 450 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) { 451 if (ptr->chassis_num == chassis_num) 452 return ptr; 453 } 454 return NULL; 455 } 456 457 static int __init combine_wpg_for_chassis(void) 458 { 459 struct opt_rio *opt_rio_ptr = NULL; 460 struct rio_detail *rio_detail_ptr = NULL; 461 462 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) { 463 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num); 464 if (!opt_rio_ptr) { 465 opt_rio_ptr = kzalloc_obj(struct opt_rio, GFP_KERNEL); 466 if (!opt_rio_ptr) 467 return -ENOMEM; 468 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type; 469 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num; 470 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num; 471 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num; 472 list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head); 473 } else { 474 opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num); 475 opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num); 476 } 477 } 478 print_opt_vg(); 479 return 0; 480 } 481 482 /* 483 * reorganizing linked list of expansion box 484 */ 485 static struct opt_rio_lo *search_opt_lo(u8 chassis_num) 486 { 487 struct opt_rio_lo *ptr; 488 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) { 489 if (ptr->chassis_num == chassis_num) 490 return ptr; 491 } 492 return NULL; 493 } 494 495 static int combine_wpg_for_expansion(void) 496 { 497 struct opt_rio_lo *opt_rio_lo_ptr = NULL; 498 struct rio_detail *rio_detail_ptr = NULL; 499 500 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) { 501 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num); 502 if (!opt_rio_lo_ptr) { 503 opt_rio_lo_ptr = kzalloc_obj(struct opt_rio_lo, 504 GFP_KERNEL); 505 if (!opt_rio_lo_ptr) 506 return -ENOMEM; 507 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type; 508 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num; 509 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num; 510 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num; 511 opt_rio_lo_ptr->pack_count = 1; 512 513 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head); 514 } else { 515 opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num); 516 opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num); 517 opt_rio_lo_ptr->pack_count = 2; 518 } 519 } 520 return 0; 521 } 522 523 524 /* Since we don't know the max slot number per each chassis, hence go 525 * through the list of all chassis to find out the range 526 * Arguments: slot_num, 1st slot number of the chassis we think we are on, 527 * var (0 = chassis, 1 = expansion box) 528 */ 529 static int first_slot_num(u8 slot_num, u8 first_slot, u8 var) 530 { 531 struct opt_rio *opt_vg_ptr = NULL; 532 struct opt_rio_lo *opt_lo_ptr = NULL; 533 int rc = 0; 534 535 if (!var) { 536 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) { 537 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) { 538 rc = -ENODEV; 539 break; 540 } 541 } 542 } else { 543 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) { 544 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) { 545 rc = -ENODEV; 546 break; 547 } 548 } 549 } 550 return rc; 551 } 552 553 static struct opt_rio_lo *find_rxe_num(u8 slot_num) 554 { 555 struct opt_rio_lo *opt_lo_ptr; 556 557 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) { 558 //check to see if this slot_num belongs to expansion box 559 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1))) 560 return opt_lo_ptr; 561 } 562 return NULL; 563 } 564 565 static struct opt_rio *find_chassis_num(u8 slot_num) 566 { 567 struct opt_rio *opt_vg_ptr; 568 569 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) { 570 //check to see if this slot_num belongs to chassis 571 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0))) 572 return opt_vg_ptr; 573 } 574 return NULL; 575 } 576 577 /* This routine will find out how many slots are in the chassis, so that 578 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc 579 */ 580 static u8 calculate_first_slot(u8 slot_num) 581 { 582 u8 first_slot = 1; 583 struct slot *slot_cur; 584 585 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { 586 if (slot_cur->ctrl) { 587 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num)) 588 first_slot = slot_cur->ctrl->ending_slot_num; 589 } 590 } 591 return first_slot + 1; 592 593 } 594 595 #define SLOT_NAME_SIZE 30 596 597 static char *create_file_name(struct slot *slot_cur) 598 { 599 struct opt_rio *opt_vg_ptr = NULL; 600 struct opt_rio_lo *opt_lo_ptr = NULL; 601 static char str[SLOT_NAME_SIZE]; 602 int which = 0; /* rxe = 1, chassis = 0 */ 603 u8 number = 1; /* either chassis or rxe # */ 604 u8 first_slot = 1; 605 u8 slot_num; 606 u8 flag = 0; 607 608 if (!slot_cur) { 609 err("Structure passed is empty\n"); 610 return NULL; 611 } 612 613 slot_num = slot_cur->number; 614 615 memset(str, 0, sizeof(str)); 616 617 if (rio_table_ptr) { 618 if (rio_table_ptr->ver_num == 3) { 619 opt_vg_ptr = find_chassis_num(slot_num); 620 opt_lo_ptr = find_rxe_num(slot_num); 621 } 622 } 623 if (opt_vg_ptr) { 624 if (opt_lo_ptr) { 625 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) { 626 number = opt_lo_ptr->chassis_num; 627 first_slot = opt_lo_ptr->first_slot_num; 628 which = 1; /* it is RXE */ 629 } else { 630 first_slot = opt_vg_ptr->first_slot_num; 631 number = opt_vg_ptr->chassis_num; 632 which = 0; 633 } 634 } else { 635 first_slot = opt_vg_ptr->first_slot_num; 636 number = opt_vg_ptr->chassis_num; 637 which = 0; 638 } 639 ++flag; 640 } else if (opt_lo_ptr) { 641 number = opt_lo_ptr->chassis_num; 642 first_slot = opt_lo_ptr->first_slot_num; 643 which = 1; 644 ++flag; 645 } else if (rio_table_ptr) { 646 if (rio_table_ptr->ver_num == 3) { 647 /* if both NULL and we DO have correct RIO table in BIOS */ 648 return NULL; 649 } 650 } 651 if (!flag) { 652 if (slot_cur->ctrl->ctlr_type == 4) { 653 first_slot = calculate_first_slot(slot_num); 654 which = 1; 655 } else { 656 which = 0; 657 } 658 } 659 660 sprintf(str, "%s%dslot%d", 661 which == 0 ? "chassis" : "rxe", 662 number, slot_num - first_slot + 1); 663 return str; 664 } 665 666 static int fillslotinfo(struct hotplug_slot *hotplug_slot) 667 { 668 struct slot *slot; 669 int rc = 0; 670 671 slot = to_slot(hotplug_slot); 672 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL); 673 return rc; 674 } 675 676 static struct pci_driver ibmphp_driver; 677 678 /* 679 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of 680 * each hpc from physical address to a list of hot plug controllers based on 681 * hpc descriptors. 682 */ 683 static int __init ebda_rsrc_controller(void) 684 { 685 u16 addr, addr_slot, addr_bus; 686 u8 ctlr_id, temp, bus_index; 687 u16 ctlr, slot, bus; 688 u16 slot_num, bus_num, index; 689 struct controller *hpc_ptr; 690 struct ebda_hpc_bus *bus_ptr; 691 struct ebda_hpc_slot *slot_ptr; 692 struct bus_info *bus_info_ptr1, *bus_info_ptr2; 693 int rc; 694 struct slot *tmp_slot; 695 char name[SLOT_NAME_SIZE]; 696 697 addr = hpc_list_ptr->phys_addr; 698 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) { 699 bus_index = 1; 700 ctlr_id = readb(io_mem + addr); 701 addr += 1; 702 slot_num = readb(io_mem + addr); 703 704 addr += 1; 705 addr_slot = addr; /* offset of slot structure */ 706 addr += (slot_num * 4); 707 708 bus_num = readb(io_mem + addr); 709 710 addr += 1; 711 addr_bus = addr; /* offset of bus */ 712 addr += (bus_num * 9); /* offset of ctlr_type */ 713 temp = readb(io_mem + addr); 714 715 addr += 1; 716 /* init hpc structure */ 717 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num); 718 if (!hpc_ptr) { 719 return -ENOMEM; 720 } 721 hpc_ptr->ctlr_id = ctlr_id; 722 hpc_ptr->ctlr_relative_id = ctlr; 723 hpc_ptr->slot_count = slot_num; 724 hpc_ptr->bus_count = bus_num; 725 debug("now enter ctlr data structure ---\n"); 726 debug("ctlr id: %x\n", ctlr_id); 727 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id); 728 debug("count of slots controlled by this ctlr: %x\n", slot_num); 729 debug("count of buses controlled by this ctlr: %x\n", bus_num); 730 731 /* init slot structure, fetch slot, bus, cap... */ 732 slot_ptr = hpc_ptr->slots; 733 for (slot = 0; slot < slot_num; slot++) { 734 slot_ptr->slot_num = readb(io_mem + addr_slot); 735 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num); 736 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num); 737 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num); 738 739 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max 740 741 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num); 742 if (!bus_info_ptr2) { 743 bus_info_ptr1 = kzalloc_obj(struct bus_info, 744 GFP_KERNEL); 745 if (!bus_info_ptr1) { 746 rc = -ENOMEM; 747 goto error_no_slot; 748 } 749 bus_info_ptr1->slot_min = slot_ptr->slot_num; 750 bus_info_ptr1->slot_max = slot_ptr->slot_num; 751 bus_info_ptr1->slot_count += 1; 752 bus_info_ptr1->busno = slot_ptr->slot_bus_num; 753 bus_info_ptr1->index = bus_index++; 754 bus_info_ptr1->current_speed = 0xff; 755 bus_info_ptr1->current_bus_mode = 0xff; 756 757 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id; 758 759 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head); 760 761 } else { 762 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num); 763 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num); 764 bus_info_ptr2->slot_count += 1; 765 766 } 767 768 // end of creating the bus_info linked list 769 770 slot_ptr++; 771 addr_slot += 1; 772 } 773 774 /* init bus structure */ 775 bus_ptr = hpc_ptr->buses; 776 for (bus = 0; bus < bus_num; bus++) { 777 bus_ptr->bus_num = readb(io_mem + addr_bus + bus); 778 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus); 779 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1); 780 781 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2); 782 783 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3); 784 785 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4); 786 787 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num); 788 if (bus_info_ptr2) { 789 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv; 790 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv; 791 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix; 792 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix; 793 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 794 } 795 bus_ptr++; 796 } 797 798 hpc_ptr->ctlr_type = temp; 799 800 switch (hpc_ptr->ctlr_type) { 801 case 1: 802 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr); 803 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1); 804 hpc_ptr->irq = readb(io_mem + addr + 2); 805 addr += 3; 806 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 807 hpc_ptr->u.pci_ctlr.bus, 808 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq); 809 break; 810 811 case 0: 812 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr); 813 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2); 814 if (!request_region(hpc_ptr->u.isa_ctlr.io_start, 815 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1), 816 "ibmphp")) { 817 rc = -ENODEV; 818 goto error_no_slot; 819 } 820 hpc_ptr->irq = readb(io_mem + addr + 4); 821 addr += 5; 822 break; 823 824 case 2: 825 case 4: 826 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr); 827 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4); 828 hpc_ptr->irq = readb(io_mem + addr + 5); 829 addr += 6; 830 break; 831 default: 832 rc = -ENODEV; 833 goto error_no_slot; 834 } 835 836 //reorganize chassis' linked list 837 combine_wpg_for_chassis(); 838 combine_wpg_for_expansion(); 839 hpc_ptr->revision = 0xff; 840 hpc_ptr->options = 0xff; 841 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num; 842 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num; 843 844 // register slots with hpc core as well as create linked list of ibm slot 845 for (index = 0; index < hpc_ptr->slot_count; index++) { 846 tmp_slot = kzalloc_obj(*tmp_slot, GFP_KERNEL); 847 if (!tmp_slot) { 848 rc = -ENOMEM; 849 goto error_no_slot; 850 } 851 852 tmp_slot->flag = 1; 853 854 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap; 855 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX) 856 tmp_slot->supported_speed = 3; 857 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX) 858 tmp_slot->supported_speed = 2; 859 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX) 860 tmp_slot->supported_speed = 1; 861 862 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP) 863 tmp_slot->supported_bus_mode = 1; 864 else 865 tmp_slot->supported_bus_mode = 0; 866 867 868 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num; 869 870 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num); 871 if (!bus_info_ptr1) { 872 rc = -ENODEV; 873 goto error; 874 } 875 tmp_slot->bus_on = bus_info_ptr1; 876 bus_info_ptr1 = NULL; 877 tmp_slot->ctrl = hpc_ptr; 878 879 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index; 880 tmp_slot->number = hpc_ptr->slots[index].slot_num; 881 882 rc = fillslotinfo(&tmp_slot->hotplug_slot); 883 if (rc) 884 goto error; 885 886 rc = ibmphp_init_devno(&tmp_slot); 887 if (rc) 888 goto error; 889 tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops; 890 891 // end of registering ibm slot with hotplug core 892 893 list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head); 894 } 895 896 print_bus_info(); 897 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head); 898 899 } /* each hpc */ 900 901 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) { 902 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot)); 903 pci_hp_register(&tmp_slot->hotplug_slot, 904 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name); 905 } 906 907 print_ebda_hpc(); 908 print_ibm_slot(); 909 return 0; 910 911 error: 912 kfree(tmp_slot); 913 error_no_slot: 914 free_ebda_hpc(hpc_ptr); 915 return rc; 916 } 917 918 /* 919 * map info (bus, devfun, start addr, end addr..) of i/o, memory, 920 * pfm from the physical addr to a list of resource. 921 */ 922 static int __init ebda_rsrc_rsrc(void) 923 { 924 u16 addr; 925 short rsrc; 926 u8 type, rsrc_type; 927 struct ebda_pci_rsrc *rsrc_ptr; 928 929 addr = rsrc_list_ptr->phys_addr; 930 debug("now entering rsrc land\n"); 931 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr); 932 933 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) { 934 type = readb(io_mem + addr); 935 936 addr += 1; 937 rsrc_type = type & EBDA_RSRC_TYPE_MASK; 938 939 if (rsrc_type == EBDA_IO_RSRC_TYPE) { 940 rsrc_ptr = alloc_ebda_pci_rsrc(); 941 if (!rsrc_ptr) { 942 iounmap(io_mem); 943 return -ENOMEM; 944 } 945 rsrc_ptr->rsrc_type = type; 946 947 rsrc_ptr->bus_num = readb(io_mem + addr); 948 rsrc_ptr->dev_fun = readb(io_mem + addr + 1); 949 rsrc_ptr->start_addr = readw(io_mem + addr + 2); 950 rsrc_ptr->end_addr = readw(io_mem + addr + 4); 951 addr += 6; 952 953 debug("rsrc from io type ----\n"); 954 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 955 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 956 957 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 958 } 959 960 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) { 961 rsrc_ptr = alloc_ebda_pci_rsrc(); 962 if (!rsrc_ptr) { 963 iounmap(io_mem); 964 return -ENOMEM; 965 } 966 rsrc_ptr->rsrc_type = type; 967 968 rsrc_ptr->bus_num = readb(io_mem + addr); 969 rsrc_ptr->dev_fun = readb(io_mem + addr + 1); 970 rsrc_ptr->start_addr = readl(io_mem + addr + 2); 971 rsrc_ptr->end_addr = readl(io_mem + addr + 6); 972 addr += 10; 973 974 debug("rsrc from mem or pfm ---\n"); 975 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 976 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr); 977 978 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head); 979 } 980 } 981 kfree(rsrc_list_ptr); 982 rsrc_list_ptr = NULL; 983 print_ebda_pci_rsrc(); 984 return 0; 985 } 986 987 u16 ibmphp_get_total_controllers(void) 988 { 989 return hpc_list_ptr->num_ctlrs; 990 } 991 992 struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num) 993 { 994 struct slot *slot; 995 996 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) { 997 if (slot->number == physical_num) 998 return slot; 999 } 1000 return NULL; 1001 } 1002 1003 /* To find: 1004 * - the smallest slot number 1005 * - the largest slot number 1006 * - the total number of the slots based on each bus 1007 * (if only one slot per bus slot_min = slot_max ) 1008 */ 1009 struct bus_info *ibmphp_find_same_bus_num(u32 num) 1010 { 1011 struct bus_info *ptr; 1012 1013 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 1014 if (ptr->busno == num) 1015 return ptr; 1016 } 1017 return NULL; 1018 } 1019 1020 /* Finding relative bus number, in order to map corresponding 1021 * bus register 1022 */ 1023 int ibmphp_get_bus_index(u8 num) 1024 { 1025 struct bus_info *ptr; 1026 1027 list_for_each_entry(ptr, &bus_info_head, bus_info_list) { 1028 if (ptr->busno == num) 1029 return ptr->index; 1030 } 1031 return -ENODEV; 1032 } 1033 1034 void ibmphp_free_bus_info_queue(void) 1035 { 1036 struct bus_info *bus_info, *next; 1037 1038 list_for_each_entry_safe(bus_info, next, &bus_info_head, 1039 bus_info_list) { 1040 kfree (bus_info); 1041 } 1042 } 1043 1044 void ibmphp_free_ebda_hpc_queue(void) 1045 { 1046 struct controller *controller = NULL, *next; 1047 int pci_flag = 0; 1048 1049 list_for_each_entry_safe(controller, next, &ebda_hpc_head, 1050 ebda_hpc_list) { 1051 if (controller->ctlr_type == 0) 1052 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1)); 1053 else if ((controller->ctlr_type == 1) && (!pci_flag)) { 1054 ++pci_flag; 1055 pci_unregister_driver(&ibmphp_driver); 1056 } 1057 free_ebda_hpc(controller); 1058 } 1059 } 1060 1061 void ibmphp_free_ebda_pci_rsrc_queue(void) 1062 { 1063 struct ebda_pci_rsrc *resource, *next; 1064 1065 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head, 1066 ebda_pci_rsrc_list) { 1067 kfree (resource); 1068 resource = NULL; 1069 } 1070 } 1071 1072 static const struct pci_device_id id_table[] = { 1073 { 1074 .vendor = PCI_VENDOR_ID_IBM, 1075 .device = HPC_DEVICE_ID, 1076 .subvendor = PCI_VENDOR_ID_IBM, 1077 .subdevice = HPC_SUBSYSTEM_ID, 1078 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1079 }, {} 1080 }; 1081 1082 MODULE_DEVICE_TABLE(pci, id_table); 1083 1084 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *); 1085 static struct pci_driver ibmphp_driver = { 1086 .name = "ibmphp", 1087 .id_table = id_table, 1088 .probe = ibmphp_probe, 1089 }; 1090 1091 int ibmphp_register_pci(void) 1092 { 1093 struct controller *ctrl; 1094 int rc = 0; 1095 1096 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1097 if (ctrl->ctlr_type == 1) { 1098 rc = pci_register_driver(&ibmphp_driver); 1099 break; 1100 } 1101 } 1102 return rc; 1103 } 1104 static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids) 1105 { 1106 struct controller *ctrl; 1107 1108 debug("inside ibmphp_probe\n"); 1109 1110 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) { 1111 if (ctrl->ctlr_type == 1) { 1112 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) { 1113 ctrl->ctrl_dev = dev; 1114 debug("found device!!!\n"); 1115 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device); 1116 return 0; 1117 } 1118 } 1119 } 1120 return -ENODEV; 1121 } 1122