1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * IBM Hot Plug Controller Driver 4 * 5 * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, 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/init.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <linux/pci.h> 20 #include <linux/interrupt.h> 21 #include <linux/delay.h> 22 #include <linux/wait.h> 23 #include "../pci.h" 24 #include <asm/pci_x86.h> /* for struct irq_routing_table */ 25 #include <asm/io_apic.h> 26 #include "ibmphp.h" 27 28 #define attn_on(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON) 29 #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF) 30 #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED) 31 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev) 32 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt) 33 34 #define DRIVER_VERSION "0.6" 35 #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver" 36 37 int ibmphp_debug; 38 39 static bool debug; 40 module_param(debug, bool, S_IRUGO | S_IWUSR); 41 MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); 42 MODULE_LICENSE("GPL"); 43 MODULE_DESCRIPTION(DRIVER_DESC); 44 45 struct pci_bus *ibmphp_pci_bus; 46 static int max_slots; 47 48 static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS 49 * tables don't provide default info for empty slots */ 50 51 static int init_flag; 52 53 /* 54 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8); 55 56 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value) 57 { 58 return get_max_adapter_speed_1 (hs, value, 1); 59 } 60 */ 61 static inline int get_cur_bus_info(struct slot **sl) 62 { 63 int rc = 1; 64 struct slot *slot_cur = *sl; 65 66 debug("options = %x\n", slot_cur->ctrl->options); 67 debug("revision = %x\n", slot_cur->ctrl->revision); 68 69 if (READ_BUS_STATUS(slot_cur->ctrl)) 70 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL); 71 72 if (rc) 73 return rc; 74 75 slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus); 76 if (READ_BUS_MODE(slot_cur->ctrl)) 77 slot_cur->bus_on->current_bus_mode = 78 CURRENT_BUS_MODE(slot_cur->busstatus); 79 else 80 slot_cur->bus_on->current_bus_mode = 0xFF; 81 82 debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n", 83 slot_cur->busstatus, 84 slot_cur->bus_on->current_speed, 85 slot_cur->bus_on->current_bus_mode); 86 87 *sl = slot_cur; 88 return 0; 89 } 90 91 static inline int slot_update(struct slot **sl) 92 { 93 int rc; 94 rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL); 95 if (rc) 96 return rc; 97 if (!init_flag) 98 rc = get_cur_bus_info(sl); 99 return rc; 100 } 101 102 static int __init get_max_slots(void) 103 { 104 struct slot *slot_cur; 105 u8 slot_count = 0; 106 107 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { 108 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */ 109 slot_count = max(slot_count, slot_cur->number); 110 } 111 return slot_count; 112 } 113 114 /* This routine will put the correct slot->device information per slot. It's 115 * called from initialization of the slot structures. It will also assign 116 * interrupt numbers per each slot. 117 * Parameters: struct slot 118 * Returns 0 or errors 119 */ 120 int ibmphp_init_devno(struct slot **cur_slot) 121 { 122 struct irq_routing_table *rtable; 123 int len; 124 int loop; 125 int i; 126 127 rtable = pcibios_get_irq_routing_table(); 128 if (!rtable) { 129 err("no BIOS routing table...\n"); 130 return -ENOMEM; 131 } 132 133 len = (rtable->size - sizeof(struct irq_routing_table)) / 134 sizeof(struct irq_info); 135 136 if (!len) { 137 kfree(rtable); 138 return -1; 139 } 140 for (loop = 0; loop < len; loop++) { 141 if ((*cur_slot)->number == rtable->slots[loop].slot && 142 (*cur_slot)->bus == rtable->slots[loop].bus) { 143 (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn); 144 for (i = 0; i < 4; i++) 145 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus, 146 (int) (*cur_slot)->device, i); 147 148 debug("(*cur_slot)->irq[0] = %x\n", 149 (*cur_slot)->irq[0]); 150 debug("(*cur_slot)->irq[1] = %x\n", 151 (*cur_slot)->irq[1]); 152 debug("(*cur_slot)->irq[2] = %x\n", 153 (*cur_slot)->irq[2]); 154 debug("(*cur_slot)->irq[3] = %x\n", 155 (*cur_slot)->irq[3]); 156 157 debug("rtable->exclusive_irqs = %x\n", 158 rtable->exclusive_irqs); 159 debug("rtable->slots[loop].irq[0].bitmap = %x\n", 160 rtable->slots[loop].irq[0].bitmap); 161 debug("rtable->slots[loop].irq[1].bitmap = %x\n", 162 rtable->slots[loop].irq[1].bitmap); 163 debug("rtable->slots[loop].irq[2].bitmap = %x\n", 164 rtable->slots[loop].irq[2].bitmap); 165 debug("rtable->slots[loop].irq[3].bitmap = %x\n", 166 rtable->slots[loop].irq[3].bitmap); 167 168 debug("rtable->slots[loop].irq[0].link = %x\n", 169 rtable->slots[loop].irq[0].link); 170 debug("rtable->slots[loop].irq[1].link = %x\n", 171 rtable->slots[loop].irq[1].link); 172 debug("rtable->slots[loop].irq[2].link = %x\n", 173 rtable->slots[loop].irq[2].link); 174 debug("rtable->slots[loop].irq[3].link = %x\n", 175 rtable->slots[loop].irq[3].link); 176 debug("end of init_devno\n"); 177 kfree(rtable); 178 return 0; 179 } 180 } 181 182 kfree(rtable); 183 return -1; 184 } 185 186 static inline int power_on(struct slot *slot_cur) 187 { 188 u8 cmd = HPC_SLOT_ON; 189 int retval; 190 191 retval = ibmphp_hpc_writeslot(slot_cur, cmd); 192 if (retval) { 193 err("power on failed\n"); 194 return retval; 195 } 196 if (CTLR_RESULT(slot_cur->ctrl->status)) { 197 err("command not completed successfully in power_on\n"); 198 return -EIO; 199 } 200 msleep(3000); /* For ServeRAID cards, and some 66 PCI */ 201 return 0; 202 } 203 204 static inline int power_off(struct slot *slot_cur) 205 { 206 u8 cmd = HPC_SLOT_OFF; 207 int retval; 208 209 retval = ibmphp_hpc_writeslot(slot_cur, cmd); 210 if (retval) { 211 err("power off failed\n"); 212 return retval; 213 } 214 if (CTLR_RESULT(slot_cur->ctrl->status)) { 215 err("command not completed successfully in power_off\n"); 216 retval = -EIO; 217 } 218 return retval; 219 } 220 221 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) 222 { 223 int rc = 0; 224 struct slot *pslot; 225 u8 cmd = 0x00; /* avoid compiler warning */ 226 227 debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n", 228 (ulong) hotplug_slot, value); 229 ibmphp_lock_operations(); 230 231 232 if (hotplug_slot) { 233 switch (value) { 234 case HPC_SLOT_ATTN_OFF: 235 cmd = HPC_SLOT_ATTNOFF; 236 break; 237 case HPC_SLOT_ATTN_ON: 238 cmd = HPC_SLOT_ATTNON; 239 break; 240 case HPC_SLOT_ATTN_BLINK: 241 cmd = HPC_SLOT_BLINKLED; 242 break; 243 default: 244 rc = -ENODEV; 245 err("set_attention_status - Error : invalid input [%x]\n", 246 value); 247 break; 248 } 249 if (rc == 0) { 250 pslot = hotplug_slot->private; 251 if (pslot) 252 rc = ibmphp_hpc_writeslot(pslot, cmd); 253 else 254 rc = -ENODEV; 255 } 256 } else 257 rc = -ENODEV; 258 259 ibmphp_unlock_operations(); 260 261 debug("set_attention_status - Exit rc[%d]\n", rc); 262 return rc; 263 } 264 265 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) 266 { 267 int rc = -ENODEV; 268 struct slot *pslot; 269 struct slot myslot; 270 271 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", 272 (ulong) hotplug_slot, (ulong) value); 273 274 ibmphp_lock_operations(); 275 if (hotplug_slot) { 276 pslot = hotplug_slot->private; 277 if (pslot) { 278 memcpy(&myslot, pslot, sizeof(struct slot)); 279 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, 280 &(myslot.status)); 281 if (!rc) 282 rc = ibmphp_hpc_readslot(pslot, 283 READ_EXTSLOTSTATUS, 284 &(myslot.ext_status)); 285 if (!rc) 286 *value = SLOT_ATTN(myslot.status, 287 myslot.ext_status); 288 } 289 } 290 291 ibmphp_unlock_operations(); 292 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value); 293 return rc; 294 } 295 296 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) 297 { 298 int rc = -ENODEV; 299 struct slot *pslot; 300 struct slot myslot; 301 302 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", 303 (ulong) hotplug_slot, (ulong) value); 304 ibmphp_lock_operations(); 305 if (hotplug_slot) { 306 pslot = hotplug_slot->private; 307 if (pslot) { 308 memcpy(&myslot, pslot, sizeof(struct slot)); 309 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, 310 &(myslot.status)); 311 if (!rc) 312 *value = SLOT_LATCH(myslot.status); 313 } 314 } 315 316 ibmphp_unlock_operations(); 317 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n", 318 rc, rc, *value); 319 return rc; 320 } 321 322 323 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) 324 { 325 int rc = -ENODEV; 326 struct slot *pslot; 327 struct slot myslot; 328 329 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", 330 (ulong) hotplug_slot, (ulong) value); 331 ibmphp_lock_operations(); 332 if (hotplug_slot) { 333 pslot = hotplug_slot->private; 334 if (pslot) { 335 memcpy(&myslot, pslot, sizeof(struct slot)); 336 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, 337 &(myslot.status)); 338 if (!rc) 339 *value = SLOT_PWRGD(myslot.status); 340 } 341 } 342 343 ibmphp_unlock_operations(); 344 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n", 345 rc, rc, *value); 346 return rc; 347 } 348 349 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value) 350 { 351 int rc = -ENODEV; 352 struct slot *pslot; 353 u8 present; 354 struct slot myslot; 355 356 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", 357 (ulong) hotplug_slot, (ulong) value); 358 ibmphp_lock_operations(); 359 if (hotplug_slot) { 360 pslot = hotplug_slot->private; 361 if (pslot) { 362 memcpy(&myslot, pslot, sizeof(struct slot)); 363 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, 364 &(myslot.status)); 365 if (!rc) { 366 present = SLOT_PRESENT(myslot.status); 367 if (present == HPC_SLOT_EMPTY) 368 *value = 0; 369 else 370 *value = 1; 371 } 372 } 373 } 374 375 ibmphp_unlock_operations(); 376 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value); 377 return rc; 378 } 379 380 static int get_max_bus_speed(struct slot *slot) 381 { 382 int rc = 0; 383 u8 mode = 0; 384 enum pci_bus_speed speed; 385 struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus; 386 387 debug("%s - Entry slot[%p]\n", __func__, slot); 388 389 ibmphp_lock_operations(); 390 mode = slot->supported_bus_mode; 391 speed = slot->supported_speed; 392 ibmphp_unlock_operations(); 393 394 switch (speed) { 395 case BUS_SPEED_33: 396 break; 397 case BUS_SPEED_66: 398 if (mode == BUS_MODE_PCIX) 399 speed += 0x01; 400 break; 401 case BUS_SPEED_100: 402 case BUS_SPEED_133: 403 speed += 0x01; 404 break; 405 default: 406 /* Note (will need to change): there would be soon 256, 512 also */ 407 rc = -ENODEV; 408 } 409 410 if (!rc) 411 bus->max_bus_speed = speed; 412 413 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed); 414 return rc; 415 } 416 417 /* 418 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag) 419 { 420 int rc = -ENODEV; 421 struct slot *pslot; 422 struct slot myslot; 423 424 debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n", 425 (ulong)hotplug_slot, (ulong) value); 426 427 if (flag) 428 ibmphp_lock_operations(); 429 430 if (hotplug_slot && value) { 431 pslot = hotplug_slot->private; 432 if (pslot) { 433 memcpy(&myslot, pslot, sizeof(struct slot)); 434 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, 435 &(myslot.status)); 436 437 if (!(SLOT_LATCH (myslot.status)) && 438 (SLOT_PRESENT (myslot.status))) { 439 rc = ibmphp_hpc_readslot(pslot, 440 READ_EXTSLOTSTATUS, 441 &(myslot.ext_status)); 442 if (!rc) 443 *value = SLOT_SPEED(myslot.ext_status); 444 } else 445 *value = MAX_ADAPTER_NONE; 446 } 447 } 448 449 if (flag) 450 ibmphp_unlock_operations(); 451 452 debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value); 453 return rc; 454 } 455 456 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value) 457 { 458 int rc = -ENODEV; 459 struct slot *pslot = NULL; 460 461 debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot); 462 463 ibmphp_lock_operations(); 464 465 if (hotplug_slot) { 466 pslot = hotplug_slot->private; 467 if (pslot) { 468 rc = 0; 469 snprintf(value, 100, "Bus %x", pslot->bus); 470 } 471 } else 472 rc = -ENODEV; 473 474 ibmphp_unlock_operations(); 475 debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value); 476 return rc; 477 } 478 */ 479 480 /**************************************************************************** 481 * This routine will initialize the ops data structure used in the validate 482 * function. It will also power off empty slots that are powered on since BIOS 483 * leaves those on, albeit disconnected 484 ****************************************************************************/ 485 static int __init init_ops(void) 486 { 487 struct slot *slot_cur; 488 int retval; 489 int rc; 490 491 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { 492 debug("BEFORE GETTING SLOT STATUS, slot # %x\n", 493 slot_cur->number); 494 if (slot_cur->ctrl->revision == 0xFF) 495 if (get_ctrl_revision(slot_cur, 496 &slot_cur->ctrl->revision)) 497 return -1; 498 499 if (slot_cur->bus_on->current_speed == 0xFF) 500 if (get_cur_bus_info(&slot_cur)) 501 return -1; 502 get_max_bus_speed(slot_cur); 503 504 if (slot_cur->ctrl->options == 0xFF) 505 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options)) 506 return -1; 507 508 retval = slot_update(&slot_cur); 509 if (retval) 510 return retval; 511 512 debug("status = %x\n", slot_cur->status); 513 debug("ext_status = %x\n", slot_cur->ext_status); 514 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status)); 515 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status)); 516 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status)); 517 518 if ((SLOT_PWRGD(slot_cur->status)) && 519 !(SLOT_PRESENT(slot_cur->status)) && 520 !(SLOT_LATCH(slot_cur->status))) { 521 debug("BEFORE POWER OFF COMMAND\n"); 522 rc = power_off(slot_cur); 523 if (rc) 524 return rc; 525 526 /* retval = slot_update(&slot_cur); 527 * if (retval) 528 * return retval; 529 * ibmphp_update_slot_info(slot_cur); 530 */ 531 } 532 } 533 init_flag = 0; 534 return 0; 535 } 536 537 /* This operation will check whether the slot is within the bounds and 538 * the operation is valid to perform on that slot 539 * Parameters: slot, operation 540 * Returns: 0 or error codes 541 */ 542 static int validate(struct slot *slot_cur, int opn) 543 { 544 int number; 545 int retval; 546 547 if (!slot_cur) 548 return -ENODEV; 549 number = slot_cur->number; 550 if ((number > max_slots) || (number < 0)) 551 return -EBADSLT; 552 debug("slot_number in validate is %d\n", slot_cur->number); 553 554 retval = slot_update(&slot_cur); 555 if (retval) 556 return retval; 557 558 switch (opn) { 559 case ENABLE: 560 if (!(SLOT_PWRGD(slot_cur->status)) && 561 (SLOT_PRESENT(slot_cur->status)) && 562 !(SLOT_LATCH(slot_cur->status))) 563 return 0; 564 break; 565 case DISABLE: 566 if ((SLOT_PWRGD(slot_cur->status)) && 567 (SLOT_PRESENT(slot_cur->status)) && 568 !(SLOT_LATCH(slot_cur->status))) 569 return 0; 570 break; 571 default: 572 break; 573 } 574 err("validate failed....\n"); 575 return -EINVAL; 576 } 577 578 /**************************************************************************** 579 * This routine is for updating the data structures in the hotplug core 580 * Parameters: struct slot 581 * Returns: 0 or error 582 ****************************************************************************/ 583 int ibmphp_update_slot_info(struct slot *slot_cur) 584 { 585 struct hotplug_slot_info *info; 586 struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus; 587 int rc; 588 u8 bus_speed; 589 u8 mode; 590 591 info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); 592 if (!info) 593 return -ENOMEM; 594 595 info->power_status = SLOT_PWRGD(slot_cur->status); 596 info->attention_status = SLOT_ATTN(slot_cur->status, 597 slot_cur->ext_status); 598 info->latch_status = SLOT_LATCH(slot_cur->status); 599 if (!SLOT_PRESENT(slot_cur->status)) { 600 info->adapter_status = 0; 601 /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */ 602 } else { 603 info->adapter_status = 1; 604 /* get_max_adapter_speed_1(slot_cur->hotplug_slot, 605 &info->max_adapter_speed_status, 0); */ 606 } 607 608 bus_speed = slot_cur->bus_on->current_speed; 609 mode = slot_cur->bus_on->current_bus_mode; 610 611 switch (bus_speed) { 612 case BUS_SPEED_33: 613 break; 614 case BUS_SPEED_66: 615 if (mode == BUS_MODE_PCIX) 616 bus_speed += 0x01; 617 else if (mode == BUS_MODE_PCI) 618 ; 619 else 620 bus_speed = PCI_SPEED_UNKNOWN; 621 break; 622 case BUS_SPEED_100: 623 case BUS_SPEED_133: 624 bus_speed += 0x01; 625 break; 626 default: 627 bus_speed = PCI_SPEED_UNKNOWN; 628 } 629 630 bus->cur_bus_speed = bus_speed; 631 // To do: bus_names 632 633 rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info); 634 kfree(info); 635 return rc; 636 } 637 638 639 /****************************************************************************** 640 * This function will return the pci_func, given bus and devfunc, or NULL. It 641 * is called from visit routines 642 ******************************************************************************/ 643 644 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function) 645 { 646 struct pci_func *func_cur; 647 struct slot *slot_cur; 648 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { 649 if (slot_cur->func) { 650 func_cur = slot_cur->func; 651 while (func_cur) { 652 if ((func_cur->busno == busno) && 653 (func_cur->device == device) && 654 (func_cur->function == function)) 655 return func_cur; 656 func_cur = func_cur->next; 657 } 658 } 659 } 660 return NULL; 661 } 662 663 /************************************************************* 664 * This routine frees up memory used by struct slot, including 665 * the pointers to pci_func, bus, hotplug_slot, controller, 666 * and deregistering from the hotplug core 667 *************************************************************/ 668 static void free_slots(void) 669 { 670 struct slot *slot_cur, *next; 671 672 debug("%s -- enter\n", __func__); 673 674 list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head, 675 ibm_slot_list) { 676 pci_hp_del(slot_cur->hotplug_slot); 677 slot_cur->ctrl = NULL; 678 slot_cur->bus_on = NULL; 679 680 /* 681 * We don't want to actually remove the resources, 682 * since ibmphp_free_resources() will do just that. 683 */ 684 ibmphp_unconfigure_card(&slot_cur, -1); 685 686 pci_hp_destroy(slot_cur->hotplug_slot); 687 kfree(slot_cur->hotplug_slot->info); 688 kfree(slot_cur->hotplug_slot); 689 kfree(slot_cur); 690 } 691 debug("%s -- exit\n", __func__); 692 } 693 694 static void ibm_unconfigure_device(struct pci_func *func) 695 { 696 struct pci_dev *temp; 697 u8 j; 698 699 debug("inside %s\n", __func__); 700 debug("func->device = %x, func->function = %x\n", 701 func->device, func->function); 702 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0); 703 704 pci_lock_rescan_remove(); 705 706 for (j = 0; j < 0x08; j++) { 707 temp = pci_get_domain_bus_and_slot(0, func->busno, 708 (func->device << 3) | j); 709 if (temp) { 710 pci_stop_and_remove_bus_device(temp); 711 pci_dev_put(temp); 712 } 713 } 714 715 pci_dev_put(func->dev); 716 717 pci_unlock_rescan_remove(); 718 } 719 720 /* 721 * The following function is to fix kernel bug regarding 722 * getting bus entries, here we manually add those primary 723 * bus entries to kernel bus structure whenever apply 724 */ 725 static u8 bus_structure_fixup(u8 busno) 726 { 727 struct pci_bus *bus, *b; 728 struct pci_dev *dev; 729 u16 l; 730 731 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno))) 732 return 1; 733 734 bus = kmalloc(sizeof(*bus), GFP_KERNEL); 735 if (!bus) 736 return 1; 737 738 dev = kmalloc(sizeof(*dev), GFP_KERNEL); 739 if (!dev) { 740 kfree(bus); 741 return 1; 742 } 743 744 bus->number = busno; 745 bus->ops = ibmphp_pci_bus->ops; 746 dev->bus = bus; 747 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) { 748 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) && 749 (l != 0x0000) && (l != 0xffff)) { 750 debug("%s - Inside bus_structure_fixup()\n", 751 __func__); 752 b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL); 753 if (!b) 754 continue; 755 756 pci_bus_add_devices(b); 757 break; 758 } 759 } 760 761 kfree(dev); 762 kfree(bus); 763 764 return 0; 765 } 766 767 static int ibm_configure_device(struct pci_func *func) 768 { 769 struct pci_bus *child; 770 int num; 771 int flag = 0; /* this is to make sure we don't double scan the bus, 772 for bridged devices primarily */ 773 774 pci_lock_rescan_remove(); 775 776 if (!(bus_structure_fixup(func->busno))) 777 flag = 1; 778 if (func->dev == NULL) 779 func->dev = pci_get_domain_bus_and_slot(0, func->busno, 780 PCI_DEVFN(func->device, func->function)); 781 782 if (func->dev == NULL) { 783 struct pci_bus *bus = pci_find_bus(0, func->busno); 784 if (!bus) 785 goto out; 786 787 num = pci_scan_slot(bus, 788 PCI_DEVFN(func->device, func->function)); 789 if (num) 790 pci_bus_add_devices(bus); 791 792 func->dev = pci_get_domain_bus_and_slot(0, func->busno, 793 PCI_DEVFN(func->device, func->function)); 794 if (func->dev == NULL) { 795 err("ERROR... : pci_dev still NULL\n"); 796 goto out; 797 } 798 } 799 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) { 800 pci_hp_add_bridge(func->dev); 801 child = func->dev->subordinate; 802 if (child) 803 pci_bus_add_devices(child); 804 } 805 806 out: 807 pci_unlock_rescan_remove(); 808 return 0; 809 } 810 811 /******************************************************* 812 * Returns whether the bus is empty or not 813 *******************************************************/ 814 static int is_bus_empty(struct slot *slot_cur) 815 { 816 int rc; 817 struct slot *tmp_slot; 818 u8 i = slot_cur->bus_on->slot_min; 819 820 while (i <= slot_cur->bus_on->slot_max) { 821 if (i == slot_cur->number) { 822 i++; 823 continue; 824 } 825 tmp_slot = ibmphp_get_slot_from_physical_num(i); 826 if (!tmp_slot) 827 return 0; 828 rc = slot_update(&tmp_slot); 829 if (rc) 830 return 0; 831 if (SLOT_PRESENT(tmp_slot->status) && 832 SLOT_PWRGD(tmp_slot->status)) 833 return 0; 834 i++; 835 } 836 return 1; 837 } 838 839 /*********************************************************** 840 * If the HPC permits and the bus currently empty, tries to set the 841 * bus speed and mode at the maximum card and bus capability 842 * Parameters: slot 843 * Returns: bus is set (0) or error code 844 ***********************************************************/ 845 static int set_bus(struct slot *slot_cur) 846 { 847 int rc; 848 u8 speed; 849 u8 cmd = 0x0; 850 int retval; 851 static const struct pci_device_id ciobx[] = { 852 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) }, 853 { }, 854 }; 855 856 debug("%s - entry slot # %d\n", __func__, slot_cur->number); 857 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) { 858 rc = slot_update(&slot_cur); 859 if (rc) 860 return rc; 861 speed = SLOT_SPEED(slot_cur->ext_status); 862 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed); 863 switch (speed) { 864 case HPC_SLOT_SPEED_33: 865 cmd = HPC_BUS_33CONVMODE; 866 break; 867 case HPC_SLOT_SPEED_66: 868 if (SLOT_PCIX(slot_cur->ext_status)) { 869 if ((slot_cur->supported_speed >= BUS_SPEED_66) && 870 (slot_cur->supported_bus_mode == BUS_MODE_PCIX)) 871 cmd = HPC_BUS_66PCIXMODE; 872 else if (!SLOT_BUS_MODE(slot_cur->ext_status)) 873 /* if max slot/bus capability is 66 pci 874 and there's no bus mode mismatch, then 875 the adapter supports 66 pci */ 876 cmd = HPC_BUS_66CONVMODE; 877 else 878 cmd = HPC_BUS_33CONVMODE; 879 } else { 880 if (slot_cur->supported_speed >= BUS_SPEED_66) 881 cmd = HPC_BUS_66CONVMODE; 882 else 883 cmd = HPC_BUS_33CONVMODE; 884 } 885 break; 886 case HPC_SLOT_SPEED_133: 887 switch (slot_cur->supported_speed) { 888 case BUS_SPEED_33: 889 cmd = HPC_BUS_33CONVMODE; 890 break; 891 case BUS_SPEED_66: 892 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX) 893 cmd = HPC_BUS_66PCIXMODE; 894 else 895 cmd = HPC_BUS_66CONVMODE; 896 break; 897 case BUS_SPEED_100: 898 cmd = HPC_BUS_100PCIXMODE; 899 break; 900 case BUS_SPEED_133: 901 /* This is to take care of the bug in CIOBX chip */ 902 if (pci_dev_present(ciobx)) 903 ibmphp_hpc_writeslot(slot_cur, 904 HPC_BUS_100PCIXMODE); 905 cmd = HPC_BUS_133PCIXMODE; 906 break; 907 default: 908 err("Wrong bus speed\n"); 909 return -ENODEV; 910 } 911 break; 912 default: 913 err("wrong slot speed\n"); 914 return -ENODEV; 915 } 916 debug("setting bus speed for slot %d, cmd %x\n", 917 slot_cur->number, cmd); 918 retval = ibmphp_hpc_writeslot(slot_cur, cmd); 919 if (retval) { 920 err("setting bus speed failed\n"); 921 return retval; 922 } 923 if (CTLR_RESULT(slot_cur->ctrl->status)) { 924 err("command not completed successfully in set_bus\n"); 925 return -EIO; 926 } 927 } 928 /* This is for x440, once Brandon fixes the firmware, 929 will not need this delay */ 930 msleep(1000); 931 debug("%s -Exit\n", __func__); 932 return 0; 933 } 934 935 /* This routine checks the bus limitations that the slot is on from the BIOS. 936 * This is used in deciding whether or not to power up the slot. 937 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on 938 * same bus) 939 * Parameters: slot 940 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus 941 */ 942 static int check_limitations(struct slot *slot_cur) 943 { 944 u8 i; 945 struct slot *tmp_slot; 946 u8 count = 0; 947 u8 limitation = 0; 948 949 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) { 950 tmp_slot = ibmphp_get_slot_from_physical_num(i); 951 if (!tmp_slot) 952 return -ENODEV; 953 if ((SLOT_PWRGD(tmp_slot->status)) && 954 !(SLOT_CONNECT(tmp_slot->status))) 955 count++; 956 } 957 get_cur_bus_info(&slot_cur); 958 switch (slot_cur->bus_on->current_speed) { 959 case BUS_SPEED_33: 960 limitation = slot_cur->bus_on->slots_at_33_conv; 961 break; 962 case BUS_SPEED_66: 963 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX) 964 limitation = slot_cur->bus_on->slots_at_66_pcix; 965 else 966 limitation = slot_cur->bus_on->slots_at_66_conv; 967 break; 968 case BUS_SPEED_100: 969 limitation = slot_cur->bus_on->slots_at_100_pcix; 970 break; 971 case BUS_SPEED_133: 972 limitation = slot_cur->bus_on->slots_at_133_pcix; 973 break; 974 } 975 976 if ((count + 1) > limitation) 977 return -EINVAL; 978 return 0; 979 } 980 981 static inline void print_card_capability(struct slot *slot_cur) 982 { 983 info("capability of the card is "); 984 if ((slot_cur->ext_status & CARD_INFO) == PCIX133) 985 info(" 133 MHz PCI-X\n"); 986 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66) 987 info(" 66 MHz PCI-X\n"); 988 else if ((slot_cur->ext_status & CARD_INFO) == PCI66) 989 info(" 66 MHz PCI\n"); 990 else 991 info(" 33 MHz PCI\n"); 992 993 } 994 995 /* This routine will power on the slot, configure the device(s) and find the 996 * drivers for them. 997 * Parameters: hotplug_slot 998 * Returns: 0 or failure codes 999 */ 1000 static int enable_slot(struct hotplug_slot *hs) 1001 { 1002 int rc, i, rcpr; 1003 struct slot *slot_cur; 1004 u8 function; 1005 struct pci_func *tmp_func; 1006 1007 ibmphp_lock_operations(); 1008 1009 debug("ENABLING SLOT........\n"); 1010 slot_cur = hs->private; 1011 1012 rc = validate(slot_cur, ENABLE); 1013 if (rc) { 1014 err("validate function failed\n"); 1015 goto error_nopower; 1016 } 1017 1018 attn_LED_blink(slot_cur); 1019 1020 rc = set_bus(slot_cur); 1021 if (rc) { 1022 err("was not able to set the bus\n"); 1023 goto error_nopower; 1024 } 1025 1026 /*-----------------debugging------------------------------*/ 1027 get_cur_bus_info(&slot_cur); 1028 debug("the current bus speed right after set_bus = %x\n", 1029 slot_cur->bus_on->current_speed); 1030 /*----------------------------------------------------------*/ 1031 1032 rc = check_limitations(slot_cur); 1033 if (rc) { 1034 err("Adding this card exceeds the limitations of this bus.\n"); 1035 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n"); 1036 err("Try hot-adding into another bus\n"); 1037 rc = -EINVAL; 1038 goto error_nopower; 1039 } 1040 1041 rc = power_on(slot_cur); 1042 1043 if (rc) { 1044 err("something wrong when powering up... please see below for details\n"); 1045 /* need to turn off before on, otherwise, blinking overwrites */ 1046 attn_off(slot_cur); 1047 attn_on(slot_cur); 1048 if (slot_update(&slot_cur)) { 1049 attn_off(slot_cur); 1050 attn_on(slot_cur); 1051 rc = -ENODEV; 1052 goto exit; 1053 } 1054 /* Check to see the error of why it failed */ 1055 if ((SLOT_POWER(slot_cur->status)) && 1056 !(SLOT_PWRGD(slot_cur->status))) 1057 err("power fault occurred trying to power up\n"); 1058 else if (SLOT_BUS_SPEED(slot_cur->status)) { 1059 err("bus speed mismatch occurred. please check current bus speed and card capability\n"); 1060 print_card_capability(slot_cur); 1061 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) { 1062 err("bus mode mismatch occurred. please check current bus mode and card capability\n"); 1063 print_card_capability(slot_cur); 1064 } 1065 ibmphp_update_slot_info(slot_cur); 1066 goto exit; 1067 } 1068 debug("after power_on\n"); 1069 /*-----------------------debugging---------------------------*/ 1070 get_cur_bus_info(&slot_cur); 1071 debug("the current bus speed right after power_on = %x\n", 1072 slot_cur->bus_on->current_speed); 1073 /*----------------------------------------------------------*/ 1074 1075 rc = slot_update(&slot_cur); 1076 if (rc) 1077 goto error_power; 1078 1079 rc = -EINVAL; 1080 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) { 1081 err("power fault occurred trying to power up...\n"); 1082 goto error_power; 1083 } 1084 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) { 1085 err("bus speed mismatch occurred. please check current bus speed and card capability\n"); 1086 print_card_capability(slot_cur); 1087 goto error_power; 1088 } 1089 /* Don't think this case will happen after above checks... 1090 * but just in case, for paranoia sake */ 1091 if (!(SLOT_POWER(slot_cur->status))) { 1092 err("power on failed...\n"); 1093 goto error_power; 1094 } 1095 1096 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL); 1097 if (!slot_cur->func) { 1098 /* We cannot do update_slot_info here, since no memory for 1099 * kmalloc n.e.ways, and update_slot_info allocates some */ 1100 rc = -ENOMEM; 1101 goto error_power; 1102 } 1103 slot_cur->func->busno = slot_cur->bus; 1104 slot_cur->func->device = slot_cur->device; 1105 for (i = 0; i < 4; i++) 1106 slot_cur->func->irq[i] = slot_cur->irq[i]; 1107 1108 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n", 1109 slot_cur->bus, slot_cur->device); 1110 1111 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) { 1112 err("configure_card was unsuccessful...\n"); 1113 /* true because don't need to actually deallocate resources, 1114 * just remove references */ 1115 ibmphp_unconfigure_card(&slot_cur, 1); 1116 debug("after unconfigure_card\n"); 1117 slot_cur->func = NULL; 1118 rc = -ENOMEM; 1119 goto error_power; 1120 } 1121 1122 function = 0x00; 1123 do { 1124 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device, 1125 function++); 1126 if (tmp_func && !(tmp_func->dev)) 1127 ibm_configure_device(tmp_func); 1128 } while (tmp_func); 1129 1130 attn_off(slot_cur); 1131 if (slot_update(&slot_cur)) { 1132 rc = -EFAULT; 1133 goto exit; 1134 } 1135 ibmphp_print_test(); 1136 rc = ibmphp_update_slot_info(slot_cur); 1137 exit: 1138 ibmphp_unlock_operations(); 1139 return rc; 1140 1141 error_nopower: 1142 attn_off(slot_cur); /* need to turn off if was blinking b4 */ 1143 attn_on(slot_cur); 1144 error_cont: 1145 rcpr = slot_update(&slot_cur); 1146 if (rcpr) { 1147 rc = rcpr; 1148 goto exit; 1149 } 1150 ibmphp_update_slot_info(slot_cur); 1151 goto exit; 1152 1153 error_power: 1154 attn_off(slot_cur); /* need to turn off if was blinking b4 */ 1155 attn_on(slot_cur); 1156 rcpr = power_off(slot_cur); 1157 if (rcpr) { 1158 rc = rcpr; 1159 goto exit; 1160 } 1161 goto error_cont; 1162 } 1163 1164 /************************************************************** 1165 * HOT REMOVING ADAPTER CARD * 1166 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE * 1167 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE * 1168 * DISABLE POWER , * 1169 **************************************************************/ 1170 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot) 1171 { 1172 struct slot *slot = hotplug_slot->private; 1173 int rc; 1174 1175 ibmphp_lock_operations(); 1176 rc = ibmphp_do_disable_slot(slot); 1177 ibmphp_unlock_operations(); 1178 return rc; 1179 } 1180 1181 int ibmphp_do_disable_slot(struct slot *slot_cur) 1182 { 1183 int rc; 1184 u8 flag; 1185 1186 debug("DISABLING SLOT...\n"); 1187 1188 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) 1189 return -ENODEV; 1190 1191 flag = slot_cur->flag; 1192 slot_cur->flag = 1; 1193 1194 if (flag == 1) { 1195 rc = validate(slot_cur, DISABLE); 1196 /* checking if powered off already & valid slot # */ 1197 if (rc) 1198 goto error; 1199 } 1200 attn_LED_blink(slot_cur); 1201 1202 if (slot_cur->func == NULL) { 1203 /* We need this for functions that were there on bootup */ 1204 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL); 1205 if (!slot_cur->func) { 1206 rc = -ENOMEM; 1207 goto error; 1208 } 1209 slot_cur->func->busno = slot_cur->bus; 1210 slot_cur->func->device = slot_cur->device; 1211 } 1212 1213 ibm_unconfigure_device(slot_cur->func); 1214 1215 /* 1216 * If we got here from latch suddenly opening on operating card or 1217 * a power fault, there's no power to the card, so cannot 1218 * read from it to determine what resources it occupied. This operation 1219 * is forbidden anyhow. The best we can do is remove it from kernel 1220 * lists at least */ 1221 1222 if (!flag) { 1223 attn_off(slot_cur); 1224 return 0; 1225 } 1226 1227 rc = ibmphp_unconfigure_card(&slot_cur, 0); 1228 slot_cur->func = NULL; 1229 debug("in disable_slot. after unconfigure_card\n"); 1230 if (rc) { 1231 err("could not unconfigure card.\n"); 1232 goto error; 1233 } 1234 1235 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF); 1236 if (rc) 1237 goto error; 1238 1239 attn_off(slot_cur); 1240 rc = slot_update(&slot_cur); 1241 if (rc) 1242 goto exit; 1243 1244 rc = ibmphp_update_slot_info(slot_cur); 1245 ibmphp_print_test(); 1246 exit: 1247 return rc; 1248 1249 error: 1250 /* Need to turn off if was blinking b4 */ 1251 attn_off(slot_cur); 1252 attn_on(slot_cur); 1253 if (slot_update(&slot_cur)) { 1254 rc = -EFAULT; 1255 goto exit; 1256 } 1257 if (flag) 1258 ibmphp_update_slot_info(slot_cur); 1259 goto exit; 1260 } 1261 1262 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = { 1263 .set_attention_status = set_attention_status, 1264 .enable_slot = enable_slot, 1265 .disable_slot = ibmphp_disable_slot, 1266 .hardware_test = NULL, 1267 .get_power_status = get_power_status, 1268 .get_attention_status = get_attention_status, 1269 .get_latch_status = get_latch_status, 1270 .get_adapter_status = get_adapter_present, 1271 /* .get_max_adapter_speed = get_max_adapter_speed, 1272 .get_bus_name_status = get_bus_name, 1273 */ 1274 }; 1275 1276 static void ibmphp_unload(void) 1277 { 1278 free_slots(); 1279 debug("after slots\n"); 1280 ibmphp_free_resources(); 1281 debug("after resources\n"); 1282 ibmphp_free_bus_info_queue(); 1283 debug("after bus info\n"); 1284 ibmphp_free_ebda_hpc_queue(); 1285 debug("after ebda hpc\n"); 1286 ibmphp_free_ebda_pci_rsrc_queue(); 1287 debug("after ebda pci rsrc\n"); 1288 kfree(ibmphp_pci_bus); 1289 } 1290 1291 static int __init ibmphp_init(void) 1292 { 1293 struct pci_bus *bus; 1294 int i = 0; 1295 int rc = 0; 1296 1297 init_flag = 1; 1298 1299 info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); 1300 1301 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL); 1302 if (!ibmphp_pci_bus) { 1303 rc = -ENOMEM; 1304 goto exit; 1305 } 1306 1307 bus = pci_find_bus(0, 0); 1308 if (!bus) { 1309 err("Can't find the root pci bus, can not continue\n"); 1310 rc = -ENODEV; 1311 goto error; 1312 } 1313 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus)); 1314 1315 ibmphp_debug = debug; 1316 1317 ibmphp_hpc_initvars(); 1318 1319 for (i = 0; i < 16; i++) 1320 irqs[i] = 0; 1321 1322 rc = ibmphp_access_ebda(); 1323 if (rc) 1324 goto error; 1325 debug("after ibmphp_access_ebda()\n"); 1326 1327 rc = ibmphp_rsrc_init(); 1328 if (rc) 1329 goto error; 1330 debug("AFTER Resource & EBDA INITIALIZATIONS\n"); 1331 1332 max_slots = get_max_slots(); 1333 1334 rc = ibmphp_register_pci(); 1335 if (rc) 1336 goto error; 1337 1338 if (init_ops()) { 1339 rc = -ENODEV; 1340 goto error; 1341 } 1342 1343 ibmphp_print_test(); 1344 rc = ibmphp_hpc_start_poll_thread(); 1345 if (rc) 1346 goto error; 1347 1348 exit: 1349 return rc; 1350 1351 error: 1352 ibmphp_unload(); 1353 goto exit; 1354 } 1355 1356 static void __exit ibmphp_exit(void) 1357 { 1358 ibmphp_hpc_stop_poll_thread(); 1359 debug("after polling\n"); 1360 ibmphp_unload(); 1361 debug("done\n"); 1362 } 1363 1364 module_init(ibmphp_init); 1365 module_exit(ibmphp_exit); 1366