shpchp_ctrl.c revision dbd7a78818d125a0ebd5507d4edb4dd5900006ab
1/* 2 * Standard Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) 6 * Copyright (C) 2001 IBM Corp. 7 * Copyright (C) 2003-2004 Intel Corporation 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 <greg@kroah.com>, <kristen.c.accardi@intel.com> 27 * 28 */ 29 30#include <linux/config.h> 31#include <linux/module.h> 32#include <linux/kernel.h> 33#include <linux/types.h> 34#include <linux/slab.h> 35#include <linux/workqueue.h> 36#include <linux/interrupt.h> 37#include <linux/delay.h> 38#include <linux/wait.h> 39#include <linux/smp_lock.h> 40#include <linux/pci.h> 41#include "../pci.h" 42#include "shpchp.h" 43#include "shpchprm.h" 44 45static void interrupt_event_handler(struct controller *ctrl); 46 47static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ 48static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */ 49static int event_finished; 50static unsigned long pushbutton_pending; /* = 0 */ 51 52u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id) 53{ 54 struct controller *ctrl = (struct controller *) inst_id; 55 struct slot *p_slot; 56 u8 rc = 0; 57 u8 getstatus; 58 struct pci_func *func; 59 struct event_info *taskInfo; 60 61 /* Attention Button Change */ 62 dbg("shpchp: Attention button interrupt received.\n"); 63 64 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); 65 66 /* This is the structure that tells the worker thread what to do */ 67 taskInfo = &(ctrl->event_queue[ctrl->next_event]); 68 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 69 70 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); 71 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 72 73 ctrl->next_event = (ctrl->next_event + 1) % 10; 74 taskInfo->hp_slot = hp_slot; 75 76 rc++; 77 78 /* 79 * Button pressed - See if need to TAKE ACTION!!! 80 */ 81 info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot); 82 taskInfo->event_type = INT_BUTTON_PRESS; 83 84 if ((p_slot->state == BLINKINGON_STATE) 85 || (p_slot->state == BLINKINGOFF_STATE)) { 86 /* Cancel if we are still blinking; this means that we press the 87 * attention again before the 5 sec. limit expires to cancel hot-add 88 * or hot-remove 89 */ 90 taskInfo->event_type = INT_BUTTON_CANCEL; 91 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot); 92 } else if ((p_slot->state == POWERON_STATE) 93 || (p_slot->state == POWEROFF_STATE)) { 94 /* Ignore if the slot is on power-on or power-off state; this 95 * means that the previous attention button action to hot-add or 96 * hot-remove is undergoing 97 */ 98 taskInfo->event_type = INT_BUTTON_IGNORE; 99 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot); 100 } 101 102 if (rc) 103 up(&event_semaphore); /* signal event thread that new event is posted */ 104 105 return 0; 106 107} 108 109u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id) 110{ 111 struct controller *ctrl = (struct controller *) inst_id; 112 struct slot *p_slot; 113 u8 rc = 0; 114 u8 getstatus; 115 struct pci_func *func; 116 struct event_info *taskInfo; 117 118 /* Switch Change */ 119 dbg("shpchp: Switch interrupt received.\n"); 120 121 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); 122 123 /* This is the structure that tells the worker thread 124 * what to do 125 */ 126 taskInfo = &(ctrl->event_queue[ctrl->next_event]); 127 ctrl->next_event = (ctrl->next_event + 1) % 10; 128 taskInfo->hp_slot = hp_slot; 129 130 rc++; 131 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 132 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); 133 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 134 dbg("%s: Card present %x Power status %x\n", __FUNCTION__, 135 func->presence_save, func->pwr_save); 136 137 if (getstatus) { 138 /* 139 * Switch opened 140 */ 141 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot); 142 func->switch_save = 0; 143 taskInfo->event_type = INT_SWITCH_OPEN; 144 if (func->pwr_save && func->presence_save) { 145 taskInfo->event_type = INT_POWER_FAULT; 146 err("Surprise Removal of card\n"); 147 } 148 } else { 149 /* 150 * Switch closed 151 */ 152 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot); 153 func->switch_save = 0x10; 154 taskInfo->event_type = INT_SWITCH_CLOSE; 155 } 156 157 if (rc) 158 up(&event_semaphore); /* signal event thread that new event is posted */ 159 160 return rc; 161} 162 163u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id) 164{ 165 struct controller *ctrl = (struct controller *) inst_id; 166 struct slot *p_slot; 167 u8 rc = 0; 168 /*u8 temp_byte;*/ 169 struct pci_func *func; 170 struct event_info *taskInfo; 171 172 /* Presence Change */ 173 dbg("shpchp: Presence/Notify input change.\n"); 174 175 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); 176 177 /* This is the structure that tells the worker thread 178 * what to do 179 */ 180 taskInfo = &(ctrl->event_queue[ctrl->next_event]); 181 ctrl->next_event = (ctrl->next_event + 1) % 10; 182 taskInfo->hp_slot = hp_slot; 183 184 rc++; 185 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 186 187 /* 188 * Save the presence state 189 */ 190 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); 191 if (func->presence_save) { 192 /* 193 * Card Present 194 */ 195 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot); 196 taskInfo->event_type = INT_PRESENCE_ON; 197 } else { 198 /* 199 * Not Present 200 */ 201 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot); 202 taskInfo->event_type = INT_PRESENCE_OFF; 203 } 204 205 if (rc) 206 up(&event_semaphore); /* signal event thread that new event is posted */ 207 208 return rc; 209} 210 211u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id) 212{ 213 struct controller *ctrl = (struct controller *) inst_id; 214 struct slot *p_slot; 215 u8 rc = 0; 216 struct pci_func *func; 217 struct event_info *taskInfo; 218 219 /* Power fault */ 220 dbg("shpchp: Power fault interrupt received.\n"); 221 222 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); 223 224 /* This is the structure that tells the worker thread 225 * what to do 226 */ 227 taskInfo = &(ctrl->event_queue[ctrl->next_event]); 228 ctrl->next_event = (ctrl->next_event + 1) % 10; 229 taskInfo->hp_slot = hp_slot; 230 231 rc++; 232 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 233 234 if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) { 235 /* 236 * Power fault Cleared 237 */ 238 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot); 239 func->status = 0x00; 240 taskInfo->event_type = INT_POWER_FAULT_CLEAR; 241 } else { 242 /* 243 * Power fault 244 */ 245 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot); 246 taskInfo->event_type = INT_POWER_FAULT; 247 /* set power fault status for this board */ 248 func->status = 0xFF; 249 info("power fault bit %x set\n", hp_slot); 250 } 251 if (rc) 252 up(&event_semaphore); /* signal event thread that new event is posted */ 253 254 return rc; 255} 256 257/** 258 * shpchp_slot_create - Creates a node and adds it to the proper bus. 259 * @busnumber - bus where new node is to be located 260 * 261 * Returns pointer to the new node or NULL if unsuccessful 262 */ 263struct pci_func *shpchp_slot_create(u8 busnumber) 264{ 265 struct pci_func *new_slot; 266 struct pci_func *next; 267 268 new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL); 269 270 if (new_slot == NULL) { 271 return(new_slot); 272 } 273 274 memset(new_slot, 0, sizeof(struct pci_func)); 275 276 new_slot->next = NULL; 277 new_slot->configured = 1; 278 279 if (shpchp_slot_list[busnumber] == NULL) { 280 shpchp_slot_list[busnumber] = new_slot; 281 } else { 282 next = shpchp_slot_list[busnumber]; 283 while (next->next != NULL) 284 next = next->next; 285 next->next = new_slot; 286 } 287 return(new_slot); 288} 289 290 291/* 292 * slot_remove - Removes a node from the linked list of slots. 293 * @old_slot: slot to remove 294 * 295 * Returns 0 if successful, !0 otherwise. 296 */ 297static int slot_remove(struct pci_func * old_slot) 298{ 299 struct pci_func *next; 300 301 if (old_slot == NULL) 302 return(1); 303 304 next = shpchp_slot_list[old_slot->bus]; 305 306 if (next == NULL) { 307 return(1); 308 } 309 310 if (next == old_slot) { 311 shpchp_slot_list[old_slot->bus] = old_slot->next; 312 kfree(old_slot); 313 return(0); 314 } 315 316 while ((next->next != old_slot) && (next->next != NULL)) { 317 next = next->next; 318 } 319 320 if (next->next == old_slot) { 321 next->next = old_slot->next; 322 kfree(old_slot); 323 return(0); 324 } else 325 return(2); 326} 327 328 329/** 330 * bridge_slot_remove - Removes a node from the linked list of slots. 331 * @bridge: bridge to remove 332 * 333 * Returns 0 if successful, !0 otherwise. 334 */ 335static int bridge_slot_remove(struct pci_func *bridge) 336{ 337 u8 subordinateBus, secondaryBus; 338 u8 tempBus; 339 struct pci_func *next; 340 341 if (bridge == NULL) 342 return(1); 343 344 secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF; 345 subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF; 346 347 for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) { 348 next = shpchp_slot_list[tempBus]; 349 350 while (!slot_remove(next)) { 351 next = shpchp_slot_list[tempBus]; 352 } 353 } 354 355 next = shpchp_slot_list[bridge->bus]; 356 357 if (next == NULL) { 358 return(1); 359 } 360 361 if (next == bridge) { 362 shpchp_slot_list[bridge->bus] = bridge->next; 363 kfree(bridge); 364 return(0); 365 } 366 367 while ((next->next != bridge) && (next->next != NULL)) { 368 next = next->next; 369 } 370 371 if (next->next == bridge) { 372 next->next = bridge->next; 373 kfree(bridge); 374 return(0); 375 } else 376 return(2); 377} 378 379 380/** 381 * shpchp_slot_find - Looks for a node by bus, and device, multiple functions accessed 382 * @bus: bus to find 383 * @device: device to find 384 * @index: is 0 for first function found, 1 for the second... 385 * 386 * Returns pointer to the node if successful, %NULL otherwise. 387 */ 388struct pci_func *shpchp_slot_find(u8 bus, u8 device, u8 index) 389{ 390 int found = -1; 391 struct pci_func *func; 392 393 func = shpchp_slot_list[bus]; 394 395 if ((func == NULL) || ((func->device == device) && (index == 0))) 396 return(func); 397 398 if (func->device == device) 399 found++; 400 401 while (func->next != NULL) { 402 func = func->next; 403 404 if (func->device == device) 405 found++; 406 407 if (found == index) 408 return(func); 409 } 410 411 return(NULL); 412} 413 414static int is_bridge(struct pci_func * func) 415{ 416 /* Check the header type */ 417 if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) 418 return 1; 419 else 420 return 0; 421} 422 423 424/* The following routines constitute the bulk of the 425 hotplug controller logic 426 */ 427static u32 change_bus_speed(struct controller *ctrl, struct slot *p_slot, enum pci_bus_speed speed) 428{ 429 u32 rc = 0; 430 431 dbg("%s: change to speed %d\n", __FUNCTION__, speed); 432 down(&ctrl->crit_sect); 433 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) { 434 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__); 435 up(&ctrl->crit_sect); 436 return WRONG_BUS_FREQUENCY; 437 } 438 wait_for_ctrl_irq (ctrl); 439 440 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { 441 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n", 442 __FUNCTION__); 443 err("%s: Error code (%d)\n", __FUNCTION__, rc); 444 up(&ctrl->crit_sect); 445 return WRONG_BUS_FREQUENCY; 446 } 447 up(&ctrl->crit_sect); 448 return rc; 449} 450 451static u32 fix_bus_speed(struct controller *ctrl, struct slot *pslot, u8 flag, 452enum pci_bus_speed asp, enum pci_bus_speed bsp, enum pci_bus_speed msp) 453{ 454 u32 rc = 0; 455 456 if (flag != 0) { /* Other slots on the same bus are occupied */ 457 if ( asp < bsp ) { 458 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp); 459 return WRONG_BUS_FREQUENCY; 460 } 461 } else { 462 /* Other slots on the same bus are empty */ 463 if (msp == bsp) { 464 /* if adapter_speed >= bus_speed, do nothing */ 465 if (asp < bsp) { 466 /* 467 * Try to lower bus speed to accommodate the adapter if other slots 468 * on the same controller are empty 469 */ 470 if ((rc = change_bus_speed(ctrl, pslot, asp))) 471 return rc; 472 } 473 } else { 474 if (asp < msp) { 475 if ((rc = change_bus_speed(ctrl, pslot, asp))) 476 return rc; 477 } else { 478 if ((rc = change_bus_speed(ctrl, pslot, msp))) 479 return rc; 480 } 481 } 482 } 483 return rc; 484} 485 486/** 487 * board_added - Called after a board has been added to the system. 488 * 489 * Turns power on for the board 490 * Configures board 491 * 492 */ 493static u32 board_added(struct pci_func * func, struct controller * ctrl) 494{ 495 u8 hp_slot; 496 u8 slots_not_empty = 0; 497 u32 rc = 0; 498 struct slot *p_slot; 499 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed; 500 u8 pi, mode; 501 502 p_slot = shpchp_find_slot(ctrl, func->device); 503 hp_slot = func->device - ctrl->slot_device_offset; 504 505 dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot); 506 507 /* Wait for exclusive access to hardware */ 508 down(&ctrl->crit_sect); 509 510 /* Power on slot without connecting to bus */ 511 rc = p_slot->hpc_ops->power_on_slot(p_slot); 512 if (rc) { 513 err("%s: Failed to power on slot\n", __FUNCTION__); 514 /* Done with exclusive hardware access */ 515 up(&ctrl->crit_sect); 516 return -1; 517 } 518 519 /* Wait for the command to complete */ 520 wait_for_ctrl_irq (ctrl); 521 522 rc = p_slot->hpc_ops->check_cmd_status(ctrl); 523 if (rc) { 524 err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc); 525 /* Done with exclusive hardware access */ 526 up(&ctrl->crit_sect); 527 return -1; 528 } 529 530 531 if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) { 532 if (slots_not_empty) 533 return WRONG_BUS_FREQUENCY; 534 535 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) { 536 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__); 537 up(&ctrl->crit_sect); 538 return WRONG_BUS_FREQUENCY; 539 } 540 wait_for_ctrl_irq (ctrl); 541 542 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { 543 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n", 544 __FUNCTION__); 545 err("%s: Error code (%d)\n", __FUNCTION__, rc); 546 up(&ctrl->crit_sect); 547 return WRONG_BUS_FREQUENCY; 548 } 549 /* turn on board, blink green LED, turn off Amber LED */ 550 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { 551 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__); 552 up(&ctrl->crit_sect); 553 return rc; 554 } 555 wait_for_ctrl_irq (ctrl); 556 557 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { 558 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc); 559 up(&ctrl->crit_sect); 560 return rc; 561 } 562 } 563 564 rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed); 565 /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */ 566 /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */ 567 /* 0xd = PCI-X 133 Mhz 533 */ 568 /* This encoding is different from the one used in cur_bus_speed & */ 569 /* max_bus_speed */ 570 571 if (rc || adapter_speed == PCI_SPEED_UNKNOWN) { 572 err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__); 573 /* Done with exclusive hardware access */ 574 up(&ctrl->crit_sect); 575 return WRONG_BUS_FREQUENCY; 576 } 577 578 rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed); 579 if (rc || bus_speed == PCI_SPEED_UNKNOWN) { 580 err("%s: Can't get bus operation speed\n", __FUNCTION__); 581 /* Done with exclusive hardware access */ 582 up(&ctrl->crit_sect); 583 return WRONG_BUS_FREQUENCY; 584 } 585 586 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed); 587 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) { 588 err("%s: Can't get max bus operation speed\n", __FUNCTION__); 589 max_bus_speed = bus_speed; 590 } 591 592 /* Done with exclusive hardware access */ 593 up(&ctrl->crit_sect); 594 595 if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) { 596 err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__); 597 pi = 1; 598 } 599 600 /* Check if there are other slots or devices on the same bus */ 601 if (!list_empty(&ctrl->pci_dev->subordinate->devices)) 602 slots_not_empty = 1; 603 604 dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__, 605 slots_not_empty, pi); 606 dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n", 607 adapter_speed, bus_speed, max_bus_speed); 608 609 if (pi == 2) { 610 dbg("%s: In PI = %d\n", __FUNCTION__, pi); 611 if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) { 612 err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__); 613 mode = 0; 614 } 615 616 switch (adapter_speed) { 617 case PCI_SPEED_133MHz_PCIX_533: 618 case PCI_SPEED_133MHz_PCIX_266: 619 if ((bus_speed != adapter_speed) && 620 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 621 return rc; 622 break; 623 case PCI_SPEED_133MHz_PCIX_ECC: 624 case PCI_SPEED_133MHz_PCIX: 625 if (mode) { /* Bus - Mode 1 ECC */ 626 if ((bus_speed != 0x7) && 627 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 628 return rc; 629 } else { 630 if ((bus_speed != 0x4) && 631 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 632 return rc; 633 } 634 break; 635 case PCI_SPEED_66MHz_PCIX_ECC: 636 case PCI_SPEED_66MHz_PCIX: 637 if (mode) { /* Bus - Mode 1 ECC */ 638 if ((bus_speed != 0x5) && 639 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 640 return rc; 641 } else { 642 if ((bus_speed != 0x2) && 643 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 644 return rc; 645 } 646 break; 647 case PCI_SPEED_66MHz: 648 if ((bus_speed != 0x1) && 649 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 650 return rc; 651 break; 652 case PCI_SPEED_33MHz: 653 if (bus_speed > 0x0) { 654 if (slots_not_empty == 0) { 655 if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed))) 656 return rc; 657 } else { 658 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed); 659 return WRONG_BUS_FREQUENCY; 660 } 661 } 662 break; 663 default: 664 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed); 665 return WRONG_BUS_FREQUENCY; 666 } 667 } else { 668 /* If adpater_speed == bus_speed, nothing to do here */ 669 dbg("%s: In PI = %d\n", __FUNCTION__, pi); 670 if ((adapter_speed != bus_speed) && 671 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) 672 return rc; 673 } 674 675 down(&ctrl->crit_sect); 676 /* turn on board, blink green LED, turn off Amber LED */ 677 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { 678 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__); 679 up(&ctrl->crit_sect); 680 return rc; 681 } 682 wait_for_ctrl_irq (ctrl); 683 684 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { 685 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc); 686 up(&ctrl->crit_sect); 687 return rc; 688 } 689 690 up(&ctrl->crit_sect); 691 692 /* Wait for ~1 second */ 693 dbg("%s: before long_delay\n", __FUNCTION__); 694 wait_for_ctrl_irq (ctrl); 695 dbg("%s: after long_delay\n", __FUNCTION__); 696 697 dbg("%s: func status = %x\n", __FUNCTION__, func->status); 698 /* Check for a power fault */ 699 if (func->status == 0xFF) { 700 /* power fault occurred, but it was benign */ 701 dbg("%s: power fault\n", __FUNCTION__); 702 rc = POWER_FAILURE; 703 func->status = 0; 704 goto err_exit; 705 } 706 707 if (shpchp_configure_device(p_slot)) { 708 err("Cannot add device at 0x%x:0x%x\n", p_slot->bus, 709 p_slot->device); 710 goto err_exit; 711 } 712 713 shpchp_save_slot_config(ctrl, func); 714 715 func->status = 0; 716 func->switch_save = 0x10; 717 func->is_a_board = 0x01; 718 func->pwr_save = 1; 719 720 /* Wait for exclusive access to hardware */ 721 down(&ctrl->crit_sect); 722 723 p_slot->hpc_ops->green_led_on(p_slot); 724 725 /* Wait for the command to complete */ 726 wait_for_ctrl_irq (ctrl); 727 728 /* Done with exclusive hardware access */ 729 up(&ctrl->crit_sect); 730 731 return 0; 732 733err_exit: 734 /* Wait for exclusive access to hardware */ 735 down(&ctrl->crit_sect); 736 737 /* turn off slot, turn on Amber LED, turn off Green LED */ 738 rc = p_slot->hpc_ops->slot_disable(p_slot); 739 if (rc) { 740 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); 741 /* Done with exclusive hardware access */ 742 up(&ctrl->crit_sect); 743 return rc; 744 } 745 /* Wait for the command to complete */ 746 wait_for_ctrl_irq (ctrl); 747 748 rc = p_slot->hpc_ops->check_cmd_status(ctrl); 749 if (rc) { 750 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc); 751 /* Done with exclusive hardware access */ 752 up(&ctrl->crit_sect); 753 return rc; 754 } 755 756 /* Done with exclusive hardware access */ 757 up(&ctrl->crit_sect); 758 759 return(rc); 760} 761 762 763/** 764 * remove_board - Turns off slot and LED's 765 * 766 */ 767static u32 remove_board(struct pci_func *func, struct controller *ctrl) 768{ 769 u8 device; 770 u8 hp_slot; 771 u32 rc; 772 struct slot *p_slot; 773 774 if (func == NULL) 775 return(1); 776 777 if (shpchp_unconfigure_device(func)) 778 return(1); 779 780 device = func->device; 781 782 hp_slot = func->device - ctrl->slot_device_offset; 783 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 784 785 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); 786 787 /* Change status to shutdown */ 788 if (func->is_a_board) 789 func->status = 0x01; 790 func->configured = 0; 791 792 /* Wait for exclusive access to hardware */ 793 down(&ctrl->crit_sect); 794 795 /* turn off slot, turn on Amber LED, turn off Green LED */ 796 rc = p_slot->hpc_ops->slot_disable(p_slot); 797 if (rc) { 798 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); 799 /* Done with exclusive hardware access */ 800 up(&ctrl->crit_sect); 801 return rc; 802 } 803 /* Wait for the command to complete */ 804 wait_for_ctrl_irq (ctrl); 805 806 rc = p_slot->hpc_ops->check_cmd_status(ctrl); 807 if (rc) { 808 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc); 809 /* Done with exclusive hardware access */ 810 up(&ctrl->crit_sect); 811 return rc; 812 } 813 814 rc = p_slot->hpc_ops->set_attention_status(p_slot, 0); 815 if (rc) { 816 err("%s: Issue of Set Attention command failed\n", __FUNCTION__); 817 /* Done with exclusive hardware access */ 818 up(&ctrl->crit_sect); 819 return rc; 820 } 821 /* Wait for the command to complete */ 822 wait_for_ctrl_irq (ctrl); 823 824 /* Done with exclusive hardware access */ 825 up(&ctrl->crit_sect); 826 827 if (ctrl->add_support) { 828 while (func) { 829 if (is_bridge(func)) { 830 dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, 831 func->device, func->function); 832 bridge_slot_remove(func); 833 } else 834 dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, 835 func->device, func->function); 836 slot_remove(func); 837 838 func = shpchp_slot_find(ctrl->slot_bus, device, 0); 839 } 840 841 /* Setup slot structure with entry for empty slot */ 842 func = shpchp_slot_create(ctrl->slot_bus); 843 844 if (func == NULL) { 845 return(1); 846 } 847 848 func->bus = ctrl->slot_bus; 849 func->device = device; 850 func->function = 0; 851 func->configured = 0; 852 func->switch_save = 0x10; 853 func->pwr_save = 0; 854 func->is_a_board = 0; 855 } 856 857 return 0; 858} 859 860 861static void pushbutton_helper_thread (unsigned long data) 862{ 863 pushbutton_pending = data; 864 865 up(&event_semaphore); 866} 867 868 869/** 870 * shpchp_pushbutton_thread 871 * 872 * Scheduled procedure to handle blocking stuff for the pushbuttons 873 * Handles all pending events and exits. 874 * 875 */ 876static void shpchp_pushbutton_thread (unsigned long slot) 877{ 878 struct slot *p_slot = (struct slot *) slot; 879 u8 getstatus; 880 881 pushbutton_pending = 0; 882 883 if (!p_slot) { 884 dbg("%s: Error! slot NULL\n", __FUNCTION__); 885 return; 886 } 887 888 p_slot->hpc_ops->get_power_status(p_slot, &getstatus); 889 if (getstatus) { 890 p_slot->state = POWEROFF_STATE; 891 dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); 892 893 shpchp_disable_slot(p_slot); 894 p_slot->state = STATIC_STATE; 895 } else { 896 p_slot->state = POWERON_STATE; 897 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); 898 899 if (shpchp_enable_slot(p_slot)) { 900 /* Wait for exclusive access to hardware */ 901 down(&p_slot->ctrl->crit_sect); 902 903 p_slot->hpc_ops->green_led_off(p_slot); 904 905 /* Wait for the command to complete */ 906 wait_for_ctrl_irq (p_slot->ctrl); 907 908 /* Done with exclusive hardware access */ 909 up(&p_slot->ctrl->crit_sect); 910 } 911 p_slot->state = STATIC_STATE; 912 } 913 914 return; 915} 916 917 918/* this is the main worker thread */ 919static int event_thread(void* data) 920{ 921 struct controller *ctrl; 922 lock_kernel(); 923 daemonize("shpchpd_event"); 924 unlock_kernel(); 925 926 while (1) { 927 dbg("!!!!event_thread sleeping\n"); 928 down_interruptible (&event_semaphore); 929 dbg("event_thread woken finished = %d\n", event_finished); 930 if (event_finished || signal_pending(current)) 931 break; 932 /* Do stuff here */ 933 if (pushbutton_pending) 934 shpchp_pushbutton_thread(pushbutton_pending); 935 else 936 for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next) 937 interrupt_event_handler(ctrl); 938 } 939 dbg("event_thread signals exit\n"); 940 up(&event_exit); 941 return 0; 942} 943 944int shpchp_event_start_thread (void) 945{ 946 int pid; 947 948 /* initialize our semaphores */ 949 init_MUTEX_LOCKED(&event_exit); 950 event_finished=0; 951 952 init_MUTEX_LOCKED(&event_semaphore); 953 pid = kernel_thread(event_thread, NULL, 0); 954 955 if (pid < 0) { 956 err ("Can't start up our event thread\n"); 957 return -1; 958 } 959 dbg("Our event thread pid = %d\n", pid); 960 return 0; 961} 962 963 964void shpchp_event_stop_thread (void) 965{ 966 event_finished = 1; 967 dbg("event_thread finish command given\n"); 968 up(&event_semaphore); 969 dbg("wait for event_thread to exit\n"); 970 down(&event_exit); 971} 972 973 974static int update_slot_info (struct slot *slot) 975{ 976 struct hotplug_slot_info *info; 977 int result; 978 979 info = kmalloc(sizeof(*info), GFP_KERNEL); 980 if (!info) 981 return -ENOMEM; 982 983 slot->hpc_ops->get_power_status(slot, &(info->power_status)); 984 slot->hpc_ops->get_attention_status(slot, &(info->attention_status)); 985 slot->hpc_ops->get_latch_status(slot, &(info->latch_status)); 986 slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status)); 987 988 result = pci_hp_change_slot_info(slot->hotplug_slot, info); 989 kfree (info); 990 return result; 991} 992 993static void interrupt_event_handler(struct controller *ctrl) 994{ 995 int loop = 0; 996 int change = 1; 997 struct pci_func *func; 998 u8 hp_slot; 999 u8 getstatus; 1000 struct slot *p_slot; 1001 1002 dbg("%s:\n", __FUNCTION__); 1003 while (change) { 1004 change = 0; 1005 1006 for (loop = 0; loop < 10; loop++) { 1007 if (ctrl->event_queue[loop].event_type != 0) { 1008 dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop, 1009 ctrl->event_queue[loop].event_type); 1010 hp_slot = ctrl->event_queue[loop].hp_slot; 1011 1012 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); 1013 1014 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); 1015 1016 dbg("%s: hp_slot %d, func %p, p_slot %p\n", __FUNCTION__, hp_slot, func, p_slot); 1017 1018 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) { 1019 dbg("%s: button cancel\n", __FUNCTION__); 1020 del_timer(&p_slot->task_event); 1021 1022 switch (p_slot->state) { 1023 case BLINKINGOFF_STATE: 1024 /* Wait for exclusive access to hardware */ 1025 down(&ctrl->crit_sect); 1026 1027 p_slot->hpc_ops->green_led_on(p_slot); 1028 /* Wait for the command to complete */ 1029 wait_for_ctrl_irq (ctrl); 1030 1031 p_slot->hpc_ops->set_attention_status(p_slot, 0); 1032 1033 /* Wait for the command to complete */ 1034 wait_for_ctrl_irq (ctrl); 1035 1036 /* Done with exclusive hardware access */ 1037 up(&ctrl->crit_sect); 1038 break; 1039 case BLINKINGON_STATE: 1040 /* Wait for exclusive access to hardware */ 1041 down(&ctrl->crit_sect); 1042 1043 p_slot->hpc_ops->green_led_off(p_slot); 1044 /* Wait for the command to complete */ 1045 wait_for_ctrl_irq (ctrl); 1046 1047 p_slot->hpc_ops->set_attention_status(p_slot, 0); 1048 /* Wait for the command to complete */ 1049 wait_for_ctrl_irq (ctrl); 1050 1051 /* Done with exclusive hardware access */ 1052 up(&ctrl->crit_sect); 1053 1054 break; 1055 default: 1056 warn("Not a valid state\n"); 1057 return; 1058 } 1059 info(msg_button_cancel, p_slot->number); 1060 p_slot->state = STATIC_STATE; 1061 } else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { 1062 /* Button Pressed (No action on 1st press...) */ 1063 dbg("%s: Button pressed\n", __FUNCTION__); 1064 1065 p_slot->hpc_ops->get_power_status(p_slot, &getstatus); 1066 if (getstatus) { 1067 /* slot is on */ 1068 dbg("%s: slot is on\n", __FUNCTION__); 1069 p_slot->state = BLINKINGOFF_STATE; 1070 info(msg_button_off, p_slot->number); 1071 } else { 1072 /* slot is off */ 1073 dbg("%s: slot is off\n", __FUNCTION__); 1074 p_slot->state = BLINKINGON_STATE; 1075 info(msg_button_on, p_slot->number); 1076 } 1077 1078 /* Wait for exclusive access to hardware */ 1079 down(&ctrl->crit_sect); 1080 1081 /* blink green LED and turn off amber */ 1082 p_slot->hpc_ops->green_led_blink(p_slot); 1083 /* Wait for the command to complete */ 1084 wait_for_ctrl_irq (ctrl); 1085 1086 p_slot->hpc_ops->set_attention_status(p_slot, 0); 1087 1088 /* Wait for the command to complete */ 1089 wait_for_ctrl_irq (ctrl); 1090 1091 /* Done with exclusive hardware access */ 1092 up(&ctrl->crit_sect); 1093 1094 init_timer(&p_slot->task_event); 1095 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ 1096 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread; 1097 p_slot->task_event.data = (unsigned long) p_slot; 1098 1099 dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot); 1100 add_timer(&p_slot->task_event); 1101 } else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { 1102 /***********POWER FAULT********************/ 1103 dbg("%s: power fault\n", __FUNCTION__); 1104 /* Wait for exclusive access to hardware */ 1105 down(&ctrl->crit_sect); 1106 1107 p_slot->hpc_ops->set_attention_status(p_slot, 1); 1108 /* Wait for the command to complete */ 1109 wait_for_ctrl_irq (ctrl); 1110 1111 p_slot->hpc_ops->green_led_off(p_slot); 1112 /* Wait for the command to complete */ 1113 wait_for_ctrl_irq (ctrl); 1114 1115 /* Done with exclusive hardware access */ 1116 up(&ctrl->crit_sect); 1117 } else { 1118 /* refresh notification */ 1119 if (p_slot) 1120 update_slot_info(p_slot); 1121 } 1122 1123 ctrl->event_queue[loop].event_type = 0; 1124 1125 change = 1; 1126 } 1127 } /* End of FOR loop */ 1128 } 1129 1130 return; 1131} 1132 1133 1134int shpchp_enable_slot (struct slot *p_slot) 1135{ 1136 u8 getstatus = 0; 1137 int rc; 1138 struct pci_func *func; 1139 1140 func = shpchp_slot_find(p_slot->bus, p_slot->device, 0); 1141 if (!func) { 1142 dbg("%s: Error! slot NULL\n", __FUNCTION__); 1143 return -ENODEV; 1144 } 1145 1146 /* Check to see if (latch closed, card present, power off) */ 1147 down(&p_slot->ctrl->crit_sect); 1148 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); 1149 if (rc || !getstatus) { 1150 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); 1151 up(&p_slot->ctrl->crit_sect); 1152 return -ENODEV; 1153 } 1154 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 1155 if (rc || getstatus) { 1156 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); 1157 up(&p_slot->ctrl->crit_sect); 1158 return -ENODEV; 1159 } 1160 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); 1161 if (rc || getstatus) { 1162 info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number); 1163 up(&p_slot->ctrl->crit_sect); 1164 return -ENODEV; 1165 } 1166 up(&p_slot->ctrl->crit_sect); 1167 1168 slot_remove(func); 1169 1170 func = shpchp_slot_create(p_slot->bus); 1171 if (func == NULL) 1172 return -ENOMEM; 1173 1174 func->bus = p_slot->bus; 1175 func->device = p_slot->device; 1176 func->function = 0; 1177 func->configured = 0; 1178 func->is_a_board = 1; 1179 1180 /* We have to save the presence info for these slots */ 1181 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); 1182 p_slot->hpc_ops->get_power_status(p_slot, &(func->pwr_save)); 1183 dbg("%s: func->pwr_save %x\n", __FUNCTION__, func->pwr_save); 1184 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 1185 func->switch_save = !getstatus? 0x10:0; 1186 1187 rc = board_added(func, p_slot->ctrl); 1188 if (rc) { 1189 if (is_bridge(func)) 1190 bridge_slot_remove(func); 1191 else 1192 slot_remove(func); 1193 1194 /* Setup slot structure with entry for empty slot */ 1195 func = shpchp_slot_create(p_slot->bus); 1196 if (func == NULL) 1197 return -ENOMEM; /* Out of memory */ 1198 1199 func->bus = p_slot->bus; 1200 func->device = p_slot->device; 1201 func->function = 0; 1202 func->configured = 0; 1203 func->is_a_board = 1; 1204 1205 /* We have to save the presence info for these slots */ 1206 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); 1207 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 1208 func->switch_save = !getstatus? 0x10:0; 1209 } 1210 1211 if (p_slot) 1212 update_slot_info(p_slot); 1213 1214 return rc; 1215} 1216 1217 1218int shpchp_disable_slot (struct slot *p_slot) 1219{ 1220 u8 class_code, header_type, BCR; 1221 u8 index = 0; 1222 u8 getstatus = 0; 1223 u32 rc = 0; 1224 int ret = 0; 1225 unsigned int devfn; 1226 struct pci_bus *pci_bus; 1227 struct pci_func *func; 1228 1229 if (!p_slot->ctrl) 1230 return -ENODEV; 1231 1232 pci_bus = p_slot->ctrl->pci_dev->subordinate; 1233 1234 /* Check to see if (latch closed, card present, power on) */ 1235 down(&p_slot->ctrl->crit_sect); 1236 1237 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); 1238 if (ret || !getstatus) { 1239 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); 1240 up(&p_slot->ctrl->crit_sect); 1241 return -ENODEV; 1242 } 1243 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); 1244 if (ret || getstatus) { 1245 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); 1246 up(&p_slot->ctrl->crit_sect); 1247 return -ENODEV; 1248 } 1249 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); 1250 if (ret || !getstatus) { 1251 info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number); 1252 up(&p_slot->ctrl->crit_sect); 1253 return -ENODEV; 1254 } 1255 up(&p_slot->ctrl->crit_sect); 1256 1257 func = shpchp_slot_find(p_slot->bus, p_slot->device, index++); 1258 1259 /* Make sure there are no video controllers here 1260 * for all func of p_slot 1261 */ 1262 while (func && !rc) { 1263 pci_bus->number = func->bus; 1264 devfn = PCI_DEVFN(func->device, func->function); 1265 1266 /* Check the Class Code */ 1267 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); 1268 if (rc) 1269 return -ENODEV; 1270 1271 if (class_code == PCI_BASE_CLASS_DISPLAY) { 1272 /* Display/Video adapter (not supported) */ 1273 rc = REMOVE_NOT_SUPPORTED; 1274 } else { 1275 /* See if it's a bridge */ 1276 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); 1277 if (rc) 1278 return -ENODEV; 1279 1280 /* If it's a bridge, check the VGA Enable bit */ 1281 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { 1282 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR); 1283 if (rc) 1284 return -ENODEV; 1285 1286 /* If the VGA Enable bit is set, remove isn't supported */ 1287 if (BCR & PCI_BRIDGE_CTL_VGA) { 1288 rc = REMOVE_NOT_SUPPORTED; 1289 } 1290 } 1291 } 1292 1293 func = shpchp_slot_find(p_slot->bus, p_slot->device, index++); 1294 } 1295 1296 func = shpchp_slot_find(p_slot->bus, p_slot->device, 0); 1297 if ((func != NULL) && !rc) { 1298 rc = remove_board(func, p_slot->ctrl); 1299 } else if (!rc) 1300 rc = -ENODEV; 1301 1302 if (p_slot) 1303 update_slot_info(p_slot); 1304 1305 return rc; 1306} 1307 1308