Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PCI Express 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 | * |
Kristen Accardi | 8cf4c19 | 2005-08-16 15:16:10 -0700 | [diff] [blame] | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 "pciehp.h" |
| 43 | #include "pciehprm.h" |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | static void interrupt_event_handler(struct controller *ctrl); |
| 46 | |
| 47 | static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ |
| 48 | static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */ |
| 49 | static int event_finished; |
| 50 | static unsigned long pushbutton_pending; /* = 0 */ |
| 51 | static unsigned long surprise_rm_pending; /* = 0 */ |
| 52 | |
| 53 | u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id) |
| 54 | { |
| 55 | struct controller *ctrl = (struct controller *) inst_id; |
| 56 | struct slot *p_slot; |
| 57 | u8 rc = 0; |
| 58 | u8 getstatus; |
| 59 | struct pci_func *func; |
| 60 | struct event_info *taskInfo; |
| 61 | |
| 62 | /* Attention Button Change */ |
| 63 | dbg("pciehp: Attention button interrupt received.\n"); |
| 64 | |
| 65 | func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); |
| 66 | |
| 67 | /* This is the structure that tells the worker thread what to do */ |
| 68 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| 69 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 70 | |
| 71 | p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); |
| 72 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 73 | |
| 74 | ctrl->next_event = (ctrl->next_event + 1) % 10; |
| 75 | taskInfo->hp_slot = hp_slot; |
| 76 | |
| 77 | rc++; |
| 78 | |
| 79 | /* |
| 80 | * Button pressed - See if need to TAKE ACTION!!! |
| 81 | */ |
| 82 | info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 83 | taskInfo->event_type = INT_BUTTON_PRESS; |
| 84 | |
| 85 | if ((p_slot->state == BLINKINGON_STATE) |
| 86 | || (p_slot->state == BLINKINGOFF_STATE)) { |
| 87 | /* Cancel if we are still blinking; this means that we press the |
| 88 | * attention again before the 5 sec. limit expires to cancel hot-add |
| 89 | * or hot-remove |
| 90 | */ |
| 91 | taskInfo->event_type = INT_BUTTON_CANCEL; |
| 92 | info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 93 | } else if ((p_slot->state == POWERON_STATE) |
| 94 | || (p_slot->state == POWEROFF_STATE)) { |
| 95 | /* Ignore if the slot is on power-on or power-off state; this |
| 96 | * means that the previous attention button action to hot-add or |
| 97 | * hot-remove is undergoing |
| 98 | */ |
| 99 | taskInfo->event_type = INT_BUTTON_IGNORE; |
| 100 | info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 101 | } |
| 102 | |
| 103 | if (rc) |
| 104 | up(&event_semaphore); /* signal event thread that new event is posted */ |
| 105 | |
| 106 | return 0; |
| 107 | |
| 108 | } |
| 109 | |
| 110 | u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id) |
| 111 | { |
| 112 | struct controller *ctrl = (struct controller *) inst_id; |
| 113 | struct slot *p_slot; |
| 114 | u8 rc = 0; |
| 115 | u8 getstatus; |
| 116 | struct pci_func *func; |
| 117 | struct event_info *taskInfo; |
| 118 | |
| 119 | /* Switch Change */ |
| 120 | dbg("pciehp: Switch interrupt received.\n"); |
| 121 | |
| 122 | func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); |
| 123 | |
| 124 | /* This is the structure that tells the worker thread |
| 125 | * what to do |
| 126 | */ |
| 127 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| 128 | ctrl->next_event = (ctrl->next_event + 1) % 10; |
| 129 | taskInfo->hp_slot = hp_slot; |
| 130 | |
| 131 | rc++; |
| 132 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 133 | p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); |
| 134 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 135 | |
| 136 | if (getstatus) { |
| 137 | /* |
| 138 | * Switch opened |
| 139 | */ |
| 140 | info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 141 | func->switch_save = 0; |
| 142 | taskInfo->event_type = INT_SWITCH_OPEN; |
| 143 | } else { |
| 144 | /* |
| 145 | * Switch closed |
| 146 | */ |
| 147 | info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 148 | func->switch_save = 0x10; |
| 149 | taskInfo->event_type = INT_SWITCH_CLOSE; |
| 150 | } |
| 151 | |
| 152 | if (rc) |
| 153 | up(&event_semaphore); /* signal event thread that new event is posted */ |
| 154 | |
| 155 | return rc; |
| 156 | } |
| 157 | |
| 158 | u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id) |
| 159 | { |
| 160 | struct controller *ctrl = (struct controller *) inst_id; |
| 161 | struct slot *p_slot; |
| 162 | u8 rc = 0; |
| 163 | struct pci_func *func; |
| 164 | struct event_info *taskInfo; |
| 165 | |
| 166 | /* Presence Change */ |
| 167 | dbg("pciehp: Presence/Notify input change.\n"); |
| 168 | |
| 169 | func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); |
| 170 | |
| 171 | /* This is the structure that tells the worker thread |
| 172 | * what to do |
| 173 | */ |
| 174 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| 175 | ctrl->next_event = (ctrl->next_event + 1) % 10; |
| 176 | taskInfo->hp_slot = hp_slot; |
| 177 | |
| 178 | rc++; |
| 179 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 180 | |
| 181 | /* Switch is open, assume a presence change |
| 182 | * Save the presence state |
| 183 | */ |
| 184 | p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); |
| 185 | if (func->presence_save) { |
| 186 | /* |
| 187 | * Card Present |
| 188 | */ |
| 189 | info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 190 | taskInfo->event_type = INT_PRESENCE_ON; |
| 191 | } else { |
| 192 | /* |
| 193 | * Not Present |
| 194 | */ |
| 195 | info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 196 | taskInfo->event_type = INT_PRESENCE_OFF; |
| 197 | } |
| 198 | |
| 199 | if (rc) |
| 200 | up(&event_semaphore); /* signal event thread that new event is posted */ |
| 201 | |
| 202 | return rc; |
| 203 | } |
| 204 | |
| 205 | u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id) |
| 206 | { |
| 207 | struct controller *ctrl = (struct controller *) inst_id; |
| 208 | struct slot *p_slot; |
| 209 | u8 rc = 0; |
| 210 | struct pci_func *func; |
| 211 | struct event_info *taskInfo; |
| 212 | |
| 213 | /* power fault */ |
| 214 | dbg("pciehp: Power fault interrupt received.\n"); |
| 215 | |
| 216 | func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); |
| 217 | |
| 218 | /* this is the structure that tells the worker thread |
| 219 | * what to do |
| 220 | */ |
| 221 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| 222 | ctrl->next_event = (ctrl->next_event + 1) % 10; |
| 223 | taskInfo->hp_slot = hp_slot; |
| 224 | |
| 225 | rc++; |
| 226 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 227 | |
| 228 | if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) { |
| 229 | /* |
| 230 | * power fault Cleared |
| 231 | */ |
| 232 | info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 233 | func->status = 0x00; |
| 234 | taskInfo->event_type = INT_POWER_FAULT_CLEAR; |
| 235 | } else { |
| 236 | /* |
| 237 | * power fault |
| 238 | */ |
| 239 | info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| 240 | taskInfo->event_type = INT_POWER_FAULT; |
| 241 | /* set power fault status for this board */ |
| 242 | func->status = 0xFF; |
| 243 | info("power fault bit %x set\n", hp_slot); |
| 244 | } |
| 245 | if (rc) |
| 246 | up(&event_semaphore); /* signal event thread that new event is posted */ |
| 247 | |
| 248 | return rc; |
| 249 | } |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | /** |
| 252 | * pciehp_slot_create - Creates a node and adds it to the proper bus. |
| 253 | * @busnumber - bus where new node is to be located |
| 254 | * |
| 255 | * Returns pointer to the new node or NULL if unsuccessful |
| 256 | */ |
| 257 | struct pci_func *pciehp_slot_create(u8 busnumber) |
| 258 | { |
| 259 | struct pci_func *new_slot; |
| 260 | struct pci_func *next; |
| 261 | dbg("%s: busnumber %x\n", __FUNCTION__, busnumber); |
| 262 | new_slot = kmalloc(sizeof(struct pci_func), GFP_KERNEL); |
| 263 | |
| 264 | if (new_slot == NULL) |
| 265 | return new_slot; |
| 266 | |
| 267 | memset(new_slot, 0, sizeof(struct pci_func)); |
| 268 | |
| 269 | new_slot->next = NULL; |
| 270 | new_slot->configured = 1; |
| 271 | |
| 272 | if (pciehp_slot_list[busnumber] == NULL) { |
| 273 | pciehp_slot_list[busnumber] = new_slot; |
| 274 | } else { |
| 275 | next = pciehp_slot_list[busnumber]; |
| 276 | while (next->next != NULL) |
| 277 | next = next->next; |
| 278 | next->next = new_slot; |
| 279 | } |
| 280 | return new_slot; |
| 281 | } |
| 282 | |
| 283 | |
| 284 | /** |
| 285 | * slot_remove - Removes a node from the linked list of slots. |
| 286 | * @old_slot: slot to remove |
| 287 | * |
| 288 | * Returns 0 if successful, !0 otherwise. |
| 289 | */ |
| 290 | static int slot_remove(struct pci_func * old_slot) |
| 291 | { |
| 292 | struct pci_func *next; |
| 293 | |
| 294 | if (old_slot == NULL) |
| 295 | return 1; |
| 296 | |
| 297 | next = pciehp_slot_list[old_slot->bus]; |
| 298 | |
| 299 | if (next == NULL) |
| 300 | return 1; |
| 301 | |
| 302 | if (next == old_slot) { |
| 303 | pciehp_slot_list[old_slot->bus] = old_slot->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | kfree(old_slot); |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | while ((next->next != old_slot) && (next->next != NULL)) { |
| 309 | next = next->next; |
| 310 | } |
| 311 | |
| 312 | if (next->next == old_slot) { |
| 313 | next->next = old_slot->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | kfree(old_slot); |
| 315 | return 0; |
| 316 | } else |
| 317 | return 2; |
| 318 | } |
| 319 | |
| 320 | |
| 321 | /** |
| 322 | * bridge_slot_remove - Removes a node from the linked list of slots. |
| 323 | * @bridge: bridge to remove |
| 324 | * |
| 325 | * Returns 0 if successful, !0 otherwise. |
| 326 | */ |
| 327 | static int bridge_slot_remove(struct pci_func *bridge) |
| 328 | { |
| 329 | u8 subordinateBus, secondaryBus; |
| 330 | u8 tempBus; |
| 331 | struct pci_func *next; |
| 332 | |
| 333 | if (bridge == NULL) |
| 334 | return 1; |
| 335 | |
| 336 | secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF; |
| 337 | subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF; |
| 338 | |
| 339 | for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) { |
| 340 | next = pciehp_slot_list[tempBus]; |
| 341 | |
| 342 | while (!slot_remove(next)) { |
| 343 | next = pciehp_slot_list[tempBus]; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | next = pciehp_slot_list[bridge->bus]; |
| 348 | |
| 349 | if (next == NULL) { |
| 350 | return 1; |
| 351 | } |
| 352 | |
| 353 | if (next == bridge) { |
| 354 | pciehp_slot_list[bridge->bus] = bridge->next; |
| 355 | kfree(bridge); |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | while ((next->next != bridge) && (next->next != NULL)) { |
| 360 | next = next->next; |
| 361 | } |
| 362 | |
| 363 | if (next->next == bridge) { |
| 364 | next->next = bridge->next; |
| 365 | kfree(bridge); |
| 366 | return 0; |
| 367 | } else |
| 368 | return 2; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | /** |
| 373 | * pciehp_slot_find - Looks for a node by bus, and device, multiple functions accessed |
| 374 | * @bus: bus to find |
| 375 | * @device: device to find |
| 376 | * @index: is 0 for first function found, 1 for the second... |
| 377 | * |
| 378 | * Returns pointer to the node if successful, %NULL otherwise. |
| 379 | */ |
| 380 | struct pci_func *pciehp_slot_find(u8 bus, u8 device, u8 index) |
| 381 | { |
| 382 | int found = -1; |
| 383 | struct pci_func *func; |
| 384 | |
| 385 | func = pciehp_slot_list[bus]; |
| 386 | dbg("%s: bus %x device %x index %x\n", |
| 387 | __FUNCTION__, bus, device, index); |
| 388 | if (func != NULL) { |
| 389 | dbg("%s: func-> bus %x device %x function %x pci_dev %p\n", |
| 390 | __FUNCTION__, func->bus, func->device, func->function, |
| 391 | func->pci_dev); |
| 392 | } else |
| 393 | dbg("%s: func == NULL\n", __FUNCTION__); |
| 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 | dbg("%s: In while loop, func-> bus %x device %x function %x pci_dev %p\n", |
| 405 | __FUNCTION__, func->bus, func->device, func->function, |
| 406 | func->pci_dev); |
| 407 | if (func->device == device) |
| 408 | found++; |
| 409 | dbg("%s: while loop, found %d, index %d\n", __FUNCTION__, |
| 410 | found, index); |
| 411 | |
| 412 | if ((found == index) || (func->function == index)) { |
| 413 | dbg("%s: Found bus %x dev %x func %x\n", __FUNCTION__, |
| 414 | func->bus, func->device, func->function); |
| 415 | return func; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | return NULL; |
| 420 | } |
| 421 | |
| 422 | static int is_bridge(struct pci_func * func) |
| 423 | { |
| 424 | /* Check the header type */ |
| 425 | if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) |
| 426 | return 1; |
| 427 | else |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | |
| 432 | /* The following routines constitute the bulk of the |
| 433 | hotplug controller logic |
| 434 | */ |
| 435 | |
| 436 | static void set_slot_off(struct controller *ctrl, struct slot * pslot) |
| 437 | { |
| 438 | /* Wait for exclusive access to hardware */ |
| 439 | down(&ctrl->crit_sect); |
| 440 | |
| 441 | /* turn off slot, turn on Amber LED, turn off Green LED if supported*/ |
| 442 | if (POWER_CTRL(ctrl->ctrlcap)) { |
| 443 | if (pslot->hpc_ops->power_off_slot(pslot)) { |
| 444 | err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__); |
| 445 | up(&ctrl->crit_sect); |
| 446 | return; |
| 447 | } |
| 448 | wait_for_ctrl_irq (ctrl); |
| 449 | } |
| 450 | |
| 451 | if (PWR_LED(ctrl->ctrlcap)) { |
| 452 | pslot->hpc_ops->green_led_off(pslot); |
| 453 | wait_for_ctrl_irq (ctrl); |
| 454 | } |
| 455 | |
| 456 | if (ATTN_LED(ctrl->ctrlcap)) { |
| 457 | if (pslot->hpc_ops->set_attention_status(pslot, 1)) { |
| 458 | err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__); |
| 459 | up(&ctrl->crit_sect); |
| 460 | return; |
| 461 | } |
| 462 | wait_for_ctrl_irq (ctrl); |
| 463 | } |
| 464 | |
| 465 | /* Done with exclusive hardware access */ |
| 466 | up(&ctrl->crit_sect); |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * board_added - Called after a board has been added to the system. |
| 471 | * |
| 472 | * Turns power on for the board |
| 473 | * Configures board |
| 474 | * |
| 475 | */ |
| 476 | static u32 board_added(struct pci_func * func, struct controller * ctrl) |
| 477 | { |
| 478 | u8 hp_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | u32 temp_register = 0xFFFFFFFF; |
| 480 | u32 rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | struct slot *p_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | p_slot = pciehp_find_slot(ctrl, func->device); |
| 484 | hp_slot = func->device - ctrl->slot_device_offset; |
| 485 | |
| 486 | dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot); |
| 487 | |
| 488 | /* Wait for exclusive access to hardware */ |
| 489 | down(&ctrl->crit_sect); |
| 490 | |
| 491 | if (POWER_CTRL(ctrl->ctrlcap)) { |
| 492 | /* Power on slot */ |
| 493 | rc = p_slot->hpc_ops->power_on_slot(p_slot); |
| 494 | if (rc) { |
| 495 | up(&ctrl->crit_sect); |
| 496 | return -1; |
| 497 | } |
| 498 | |
| 499 | /* Wait for the command to complete */ |
| 500 | wait_for_ctrl_irq (ctrl); |
| 501 | } |
| 502 | |
| 503 | if (PWR_LED(ctrl->ctrlcap)) { |
| 504 | p_slot->hpc_ops->green_led_blink(p_slot); |
| 505 | |
| 506 | /* Wait for the command to complete */ |
| 507 | wait_for_ctrl_irq (ctrl); |
| 508 | } |
| 509 | |
| 510 | /* Done with exclusive hardware access */ |
| 511 | up(&ctrl->crit_sect); |
| 512 | |
| 513 | /* Wait for ~1 second */ |
| 514 | dbg("%s: before long_delay\n", __FUNCTION__); |
| 515 | wait_for_ctrl_irq (ctrl); |
| 516 | dbg("%s: afterlong_delay\n", __FUNCTION__); |
| 517 | |
| 518 | /* Check link training status */ |
| 519 | rc = p_slot->hpc_ops->check_lnk_status(ctrl); |
| 520 | if (rc) { |
| 521 | err("%s: Failed to check link status\n", __FUNCTION__); |
| 522 | set_slot_off(ctrl, p_slot); |
| 523 | return rc; |
| 524 | } |
| 525 | |
| 526 | dbg("%s: func status = %x\n", __FUNCTION__, func->status); |
| 527 | |
| 528 | /* Check for a power fault */ |
| 529 | if (func->status == 0xFF) { |
| 530 | /* power fault occurred, but it was benign */ |
| 531 | temp_register = 0xFFFFFFFF; |
| 532 | dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register); |
| 533 | rc = POWER_FAILURE; |
| 534 | func->status = 0; |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 535 | goto err_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | } |
| 537 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 538 | rc = pciehp_configure_device(p_slot); |
| 539 | if (rc) { |
| 540 | err("Cannot add device 0x%x:%x\n", p_slot->bus, |
| 541 | p_slot->device); |
| 542 | goto err_exit; |
| 543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 545 | pciehp_save_slot_config(ctrl, func); |
| 546 | func->status = 0; |
| 547 | func->switch_save = 0x10; |
| 548 | func->is_a_board = 0x01; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 550 | /* |
| 551 | * Some PCI Express root ports require fixup after hot-plug operation. |
| 552 | */ |
| 553 | if (pcie_mch_quirk) |
| 554 | pci_fixup_device(pci_fixup_final, ctrl->pci_dev); |
| 555 | if (PWR_LED(ctrl->ctrlcap)) { |
| 556 | /* Wait for exclusive access to hardware */ |
| 557 | down(&ctrl->crit_sect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 559 | p_slot->hpc_ops->green_led_on(p_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 561 | /* Wait for the command to complete */ |
| 562 | wait_for_ctrl_irq (ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 564 | /* Done with exclusive hardware access */ |
| 565 | up(&ctrl->crit_sect); |
| 566 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | return 0; |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame^] | 568 | |
| 569 | err_exit: |
| 570 | set_slot_off(ctrl, p_slot); |
| 571 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | |
| 575 | /** |
| 576 | * remove_board - Turns off slot and LED's |
| 577 | * |
| 578 | */ |
| 579 | static u32 remove_board(struct pci_func *func, struct controller *ctrl) |
| 580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | u8 device; |
| 582 | u8 hp_slot; |
| 583 | u32 rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | struct slot *p_slot; |
| 585 | |
| 586 | if (func == NULL) |
| 587 | return 1; |
| 588 | |
| 589 | if (pciehp_unconfigure_device(func)) |
| 590 | return 1; |
| 591 | |
| 592 | device = func->device; |
| 593 | |
| 594 | hp_slot = func->device - ctrl->slot_device_offset; |
| 595 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 596 | |
| 597 | dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | /* Change status to shutdown */ |
| 600 | if (func->is_a_board) |
| 601 | func->status = 0x01; |
| 602 | func->configured = 0; |
| 603 | |
| 604 | /* Wait for exclusive access to hardware */ |
| 605 | down(&ctrl->crit_sect); |
| 606 | |
| 607 | if (POWER_CTRL(ctrl->ctrlcap)) { |
| 608 | /* power off slot */ |
| 609 | rc = p_slot->hpc_ops->power_off_slot(p_slot); |
| 610 | if (rc) { |
| 611 | err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); |
| 612 | up(&ctrl->crit_sect); |
| 613 | return rc; |
| 614 | } |
| 615 | /* Wait for the command to complete */ |
| 616 | wait_for_ctrl_irq (ctrl); |
| 617 | } |
| 618 | |
| 619 | if (PWR_LED(ctrl->ctrlcap)) { |
| 620 | /* turn off Green LED */ |
| 621 | p_slot->hpc_ops->green_led_off(p_slot); |
| 622 | |
| 623 | /* Wait for the command to complete */ |
| 624 | wait_for_ctrl_irq (ctrl); |
| 625 | } |
| 626 | |
| 627 | /* Done with exclusive hardware access */ |
| 628 | up(&ctrl->crit_sect); |
| 629 | |
| 630 | if (ctrl->add_support) { |
| 631 | while (func) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | if (is_bridge(func)) { |
| 633 | dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", |
| 634 | ctrl->seg, func->bus, func->device, func->function); |
| 635 | bridge_slot_remove(func); |
| 636 | } else { |
| 637 | dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", |
| 638 | ctrl->seg, func->bus, func->device, func->function); |
| 639 | slot_remove(func); |
| 640 | } |
| 641 | |
| 642 | func = pciehp_slot_find(ctrl->slot_bus, device, 0); |
| 643 | } |
| 644 | |
| 645 | /* Setup slot structure with entry for empty slot */ |
| 646 | func = pciehp_slot_create(ctrl->slot_bus); |
| 647 | |
| 648 | if (func == NULL) { |
| 649 | return 1; |
| 650 | } |
| 651 | |
| 652 | func->bus = ctrl->slot_bus; |
| 653 | func->device = device; |
| 654 | func->function = 0; |
| 655 | func->configured = 0; |
| 656 | func->switch_save = 0x10; |
| 657 | func->is_a_board = 0; |
| 658 | } |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | |
| 664 | static void pushbutton_helper_thread(unsigned long data) |
| 665 | { |
| 666 | pushbutton_pending = data; |
| 667 | |
| 668 | up(&event_semaphore); |
| 669 | } |
| 670 | |
| 671 | /** |
| 672 | * pciehp_pushbutton_thread |
| 673 | * |
| 674 | * Scheduled procedure to handle blocking stuff for the pushbuttons |
| 675 | * Handles all pending events and exits. |
| 676 | * |
| 677 | */ |
| 678 | static void pciehp_pushbutton_thread(unsigned long slot) |
| 679 | { |
| 680 | struct slot *p_slot = (struct slot *) slot; |
| 681 | u8 getstatus; |
| 682 | |
| 683 | pushbutton_pending = 0; |
| 684 | |
| 685 | if (!p_slot) { |
| 686 | dbg("%s: Error! slot NULL\n", __FUNCTION__); |
| 687 | return; |
| 688 | } |
| 689 | |
| 690 | p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| 691 | if (getstatus) { |
| 692 | p_slot->state = POWEROFF_STATE; |
| 693 | dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); |
| 694 | |
| 695 | pciehp_disable_slot(p_slot); |
| 696 | p_slot->state = STATIC_STATE; |
| 697 | } else { |
| 698 | p_slot->state = POWERON_STATE; |
| 699 | dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); |
| 700 | |
| 701 | if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) { |
| 702 | /* Wait for exclusive access to hardware */ |
| 703 | down(&p_slot->ctrl->crit_sect); |
| 704 | |
| 705 | p_slot->hpc_ops->green_led_off(p_slot); |
| 706 | |
| 707 | /* Wait for the command to complete */ |
| 708 | wait_for_ctrl_irq (p_slot->ctrl); |
| 709 | |
| 710 | /* Done with exclusive hardware access */ |
| 711 | up(&p_slot->ctrl->crit_sect); |
| 712 | } |
| 713 | p_slot->state = STATIC_STATE; |
| 714 | } |
| 715 | |
| 716 | return; |
| 717 | } |
| 718 | |
| 719 | /** |
| 720 | * pciehp_surprise_rm_thread |
| 721 | * |
| 722 | * Scheduled procedure to handle blocking stuff for the surprise removal |
| 723 | * Handles all pending events and exits. |
| 724 | * |
| 725 | */ |
| 726 | static void pciehp_surprise_rm_thread(unsigned long slot) |
| 727 | { |
| 728 | struct slot *p_slot = (struct slot *) slot; |
| 729 | u8 getstatus; |
| 730 | |
| 731 | surprise_rm_pending = 0; |
| 732 | |
| 733 | if (!p_slot) { |
| 734 | dbg("%s: Error! slot NULL\n", __FUNCTION__); |
| 735 | return; |
| 736 | } |
| 737 | |
| 738 | p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| 739 | if (!getstatus) { |
| 740 | p_slot->state = POWEROFF_STATE; |
| 741 | dbg("In removing board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); |
| 742 | |
| 743 | pciehp_disable_slot(p_slot); |
| 744 | p_slot->state = STATIC_STATE; |
| 745 | } else { |
| 746 | p_slot->state = POWERON_STATE; |
| 747 | dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device); |
| 748 | |
| 749 | if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) { |
| 750 | /* Wait for exclusive access to hardware */ |
| 751 | down(&p_slot->ctrl->crit_sect); |
| 752 | |
| 753 | p_slot->hpc_ops->green_led_off(p_slot); |
| 754 | |
| 755 | /* Wait for the command to complete */ |
| 756 | wait_for_ctrl_irq (p_slot->ctrl); |
| 757 | |
| 758 | /* Done with exclusive hardware access */ |
| 759 | up(&p_slot->ctrl->crit_sect); |
| 760 | } |
| 761 | p_slot->state = STATIC_STATE; |
| 762 | } |
| 763 | |
| 764 | return; |
| 765 | } |
| 766 | |
| 767 | |
| 768 | |
| 769 | /* this is the main worker thread */ |
| 770 | static int event_thread(void* data) |
| 771 | { |
| 772 | struct controller *ctrl; |
| 773 | lock_kernel(); |
| 774 | daemonize("pciehpd_event"); |
| 775 | |
| 776 | unlock_kernel(); |
| 777 | |
| 778 | while (1) { |
| 779 | dbg("!!!!event_thread sleeping\n"); |
| 780 | down_interruptible (&event_semaphore); |
| 781 | dbg("event_thread woken finished = %d\n", event_finished); |
| 782 | if (event_finished || signal_pending(current)) |
| 783 | break; |
| 784 | /* Do stuff here */ |
| 785 | if (pushbutton_pending) |
| 786 | pciehp_pushbutton_thread(pushbutton_pending); |
| 787 | else if (surprise_rm_pending) |
| 788 | pciehp_surprise_rm_thread(surprise_rm_pending); |
| 789 | else |
| 790 | for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next) |
| 791 | interrupt_event_handler(ctrl); |
| 792 | } |
| 793 | dbg("event_thread signals exit\n"); |
| 794 | up(&event_exit); |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | int pciehp_event_start_thread(void) |
| 799 | { |
| 800 | int pid; |
| 801 | |
| 802 | /* initialize our semaphores */ |
| 803 | init_MUTEX_LOCKED(&event_exit); |
| 804 | event_finished=0; |
| 805 | |
| 806 | init_MUTEX_LOCKED(&event_semaphore); |
| 807 | pid = kernel_thread(event_thread, NULL, 0); |
| 808 | |
| 809 | if (pid < 0) { |
| 810 | err ("Can't start up our event thread\n"); |
| 811 | return -1; |
| 812 | } |
| 813 | dbg("Our event thread pid = %d\n", pid); |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | |
| 818 | void pciehp_event_stop_thread(void) |
| 819 | { |
| 820 | event_finished = 1; |
| 821 | dbg("event_thread finish command given\n"); |
| 822 | up(&event_semaphore); |
| 823 | dbg("wait for event_thread to exit\n"); |
| 824 | down(&event_exit); |
| 825 | } |
| 826 | |
| 827 | |
| 828 | static int update_slot_info(struct slot *slot) |
| 829 | { |
| 830 | struct hotplug_slot_info *info; |
| 831 | /* char buffer[SLOT_NAME_SIZE]; */ |
| 832 | int result; |
| 833 | |
| 834 | info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); |
| 835 | if (!info) |
| 836 | return -ENOMEM; |
| 837 | |
| 838 | /* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */ |
| 839 | |
| 840 | slot->hpc_ops->get_power_status(slot, &(info->power_status)); |
| 841 | slot->hpc_ops->get_attention_status(slot, &(info->attention_status)); |
| 842 | slot->hpc_ops->get_latch_status(slot, &(info->latch_status)); |
| 843 | slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status)); |
| 844 | |
| 845 | /* result = pci_hp_change_slot_info(buffer, info); */ |
| 846 | result = pci_hp_change_slot_info(slot->hotplug_slot, info); |
| 847 | kfree (info); |
| 848 | return result; |
| 849 | } |
| 850 | |
| 851 | static void interrupt_event_handler(struct controller *ctrl) |
| 852 | { |
| 853 | int loop = 0; |
| 854 | int change = 1; |
| 855 | struct pci_func *func; |
| 856 | u8 hp_slot; |
| 857 | u8 getstatus; |
| 858 | struct slot *p_slot; |
| 859 | |
| 860 | while (change) { |
| 861 | change = 0; |
| 862 | |
| 863 | for (loop = 0; loop < 10; loop++) { |
| 864 | if (ctrl->event_queue[loop].event_type != 0) { |
| 865 | hp_slot = ctrl->event_queue[loop].hp_slot; |
| 866 | |
| 867 | func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0); |
| 868 | |
| 869 | p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| 870 | |
| 871 | dbg("hp_slot %d, func %p, p_slot %p\n", hp_slot, func, p_slot); |
| 872 | |
| 873 | if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) { |
| 874 | dbg("button cancel\n"); |
| 875 | del_timer(&p_slot->task_event); |
| 876 | |
| 877 | switch (p_slot->state) { |
| 878 | case BLINKINGOFF_STATE: |
| 879 | /* Wait for exclusive access to hardware */ |
| 880 | down(&ctrl->crit_sect); |
| 881 | |
| 882 | if (PWR_LED(ctrl->ctrlcap)) { |
| 883 | p_slot->hpc_ops->green_led_on(p_slot); |
| 884 | /* Wait for the command to complete */ |
| 885 | wait_for_ctrl_irq (ctrl); |
| 886 | } |
| 887 | if (ATTN_LED(ctrl->ctrlcap)) { |
| 888 | p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| 889 | |
| 890 | /* Wait for the command to complete */ |
| 891 | wait_for_ctrl_irq (ctrl); |
| 892 | } |
| 893 | /* Done with exclusive hardware access */ |
| 894 | up(&ctrl->crit_sect); |
| 895 | break; |
| 896 | case BLINKINGON_STATE: |
| 897 | /* Wait for exclusive access to hardware */ |
| 898 | down(&ctrl->crit_sect); |
| 899 | |
| 900 | if (PWR_LED(ctrl->ctrlcap)) { |
| 901 | p_slot->hpc_ops->green_led_off(p_slot); |
| 902 | /* Wait for the command to complete */ |
| 903 | wait_for_ctrl_irq (ctrl); |
| 904 | } |
| 905 | if (ATTN_LED(ctrl->ctrlcap)){ |
| 906 | p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| 907 | /* Wait for the command to complete */ |
| 908 | wait_for_ctrl_irq (ctrl); |
| 909 | } |
| 910 | /* Done with exclusive hardware access */ |
| 911 | up(&ctrl->crit_sect); |
| 912 | |
| 913 | break; |
| 914 | default: |
| 915 | warn("Not a valid state\n"); |
| 916 | return; |
| 917 | } |
| 918 | info(msg_button_cancel, p_slot->number); |
| 919 | p_slot->state = STATIC_STATE; |
| 920 | } |
| 921 | /* ***********Button Pressed (No action on 1st press...) */ |
| 922 | else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { |
| 923 | |
| 924 | if (ATTN_BUTTN(ctrl->ctrlcap)) { |
| 925 | dbg("Button pressed\n"); |
| 926 | p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| 927 | if (getstatus) { |
| 928 | /* slot is on */ |
| 929 | dbg("slot is on\n"); |
| 930 | p_slot->state = BLINKINGOFF_STATE; |
| 931 | info(msg_button_off, p_slot->number); |
| 932 | } else { |
| 933 | /* slot is off */ |
| 934 | dbg("slot is off\n"); |
| 935 | p_slot->state = BLINKINGON_STATE; |
| 936 | info(msg_button_on, p_slot->number); |
| 937 | } |
| 938 | |
| 939 | /* Wait for exclusive access to hardware */ |
| 940 | down(&ctrl->crit_sect); |
| 941 | |
| 942 | /* blink green LED and turn off amber */ |
| 943 | if (PWR_LED(ctrl->ctrlcap)) { |
| 944 | p_slot->hpc_ops->green_led_blink(p_slot); |
| 945 | /* Wait for the command to complete */ |
| 946 | wait_for_ctrl_irq (ctrl); |
| 947 | } |
| 948 | |
| 949 | if (ATTN_LED(ctrl->ctrlcap)) { |
| 950 | p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| 951 | |
| 952 | /* Wait for the command to complete */ |
| 953 | wait_for_ctrl_irq (ctrl); |
| 954 | } |
| 955 | |
| 956 | /* Done with exclusive hardware access */ |
| 957 | up(&ctrl->crit_sect); |
| 958 | |
| 959 | init_timer(&p_slot->task_event); |
| 960 | p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ |
| 961 | p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread; |
| 962 | p_slot->task_event.data = (unsigned long) p_slot; |
| 963 | |
| 964 | dbg("add_timer p_slot = %p\n", (void *) p_slot); |
| 965 | add_timer(&p_slot->task_event); |
| 966 | } |
| 967 | } |
| 968 | /***********POWER FAULT********************/ |
| 969 | else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { |
| 970 | if (POWER_CTRL(ctrl->ctrlcap)) { |
| 971 | dbg("power fault\n"); |
| 972 | /* Wait for exclusive access to hardware */ |
| 973 | down(&ctrl->crit_sect); |
| 974 | |
| 975 | if (ATTN_LED(ctrl->ctrlcap)) { |
| 976 | p_slot->hpc_ops->set_attention_status(p_slot, 1); |
| 977 | wait_for_ctrl_irq (ctrl); |
| 978 | } |
| 979 | |
| 980 | if (PWR_LED(ctrl->ctrlcap)) { |
| 981 | p_slot->hpc_ops->green_led_off(p_slot); |
| 982 | wait_for_ctrl_irq (ctrl); |
| 983 | } |
| 984 | |
| 985 | /* Done with exclusive hardware access */ |
| 986 | up(&ctrl->crit_sect); |
| 987 | } |
| 988 | } |
| 989 | /***********SURPRISE REMOVAL********************/ |
| 990 | else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) || |
| 991 | (ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) { |
| 992 | if (HP_SUPR_RM(ctrl->ctrlcap)) { |
| 993 | dbg("Surprise Removal\n"); |
| 994 | if (p_slot) { |
| 995 | surprise_rm_pending = (unsigned long) p_slot; |
| 996 | up(&event_semaphore); |
| 997 | update_slot_info(p_slot); |
| 998 | } |
| 999 | } |
| 1000 | } else { |
| 1001 | /* refresh notification */ |
| 1002 | if (p_slot) |
| 1003 | update_slot_info(p_slot); |
| 1004 | } |
| 1005 | |
| 1006 | ctrl->event_queue[loop].event_type = 0; |
| 1007 | |
| 1008 | change = 1; |
| 1009 | } |
| 1010 | } /* End of FOR loop */ |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | int pciehp_enable_slot(struct slot *p_slot) |
| 1016 | { |
| 1017 | u8 getstatus = 0; |
| 1018 | int rc; |
| 1019 | struct pci_func *func; |
| 1020 | |
| 1021 | func = pciehp_slot_find(p_slot->bus, p_slot->device, 0); |
| 1022 | if (!func) { |
| 1023 | dbg("%s: Error! slot NULL\n", __FUNCTION__); |
| 1024 | return 1; |
| 1025 | } |
| 1026 | |
| 1027 | /* Check to see if (latch closed, card present, power off) */ |
| 1028 | down(&p_slot->ctrl->crit_sect); |
| 1029 | |
| 1030 | rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| 1031 | if (rc || !getstatus) { |
| 1032 | info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1033 | up(&p_slot->ctrl->crit_sect); |
| 1034 | return 1; |
| 1035 | } |
| 1036 | if (MRL_SENS(p_slot->ctrl->ctrlcap)) { |
| 1037 | rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 1038 | if (rc || getstatus) { |
| 1039 | info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1040 | up(&p_slot->ctrl->crit_sect); |
| 1041 | return 1; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | if (POWER_CTRL(p_slot->ctrl->ctrlcap)) { |
| 1046 | rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| 1047 | if (rc || getstatus) { |
| 1048 | info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1049 | up(&p_slot->ctrl->crit_sect); |
| 1050 | return 1; |
| 1051 | } |
| 1052 | } |
| 1053 | up(&p_slot->ctrl->crit_sect); |
| 1054 | |
| 1055 | slot_remove(func); |
| 1056 | |
| 1057 | func = pciehp_slot_create(p_slot->bus); |
| 1058 | if (func == NULL) |
| 1059 | return 1; |
| 1060 | |
| 1061 | func->bus = p_slot->bus; |
| 1062 | func->device = p_slot->device; |
| 1063 | func->function = 0; |
| 1064 | func->configured = 0; |
| 1065 | func->is_a_board = 1; |
| 1066 | |
| 1067 | /* We have to save the presence info for these slots */ |
| 1068 | p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); |
| 1069 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 1070 | func->switch_save = !getstatus? 0x10:0; |
| 1071 | |
| 1072 | rc = board_added(func, p_slot->ctrl); |
| 1073 | if (rc) { |
| 1074 | if (is_bridge(func)) |
| 1075 | bridge_slot_remove(func); |
| 1076 | else |
| 1077 | slot_remove(func); |
| 1078 | |
| 1079 | /* Setup slot structure with entry for empty slot */ |
| 1080 | func = pciehp_slot_create(p_slot->bus); |
| 1081 | if (func == NULL) |
| 1082 | return 1; /* Out of memory */ |
| 1083 | |
| 1084 | func->bus = p_slot->bus; |
| 1085 | func->device = p_slot->device; |
| 1086 | func->function = 0; |
| 1087 | func->configured = 0; |
| 1088 | func->is_a_board = 1; |
| 1089 | |
| 1090 | /* We have to save the presence info for these slots */ |
| 1091 | p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save)); |
| 1092 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 1093 | func->switch_save = !getstatus? 0x10:0; |
| 1094 | } |
| 1095 | |
| 1096 | if (p_slot) |
| 1097 | update_slot_info(p_slot); |
| 1098 | |
| 1099 | return rc; |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | int pciehp_disable_slot(struct slot *p_slot) |
| 1104 | { |
| 1105 | u8 class_code, header_type, BCR; |
| 1106 | u8 index = 0; |
| 1107 | u8 getstatus = 0; |
| 1108 | u32 rc = 0; |
| 1109 | int ret = 0; |
| 1110 | unsigned int devfn; |
| 1111 | struct pci_bus *pci_bus = p_slot->ctrl->pci_dev->subordinate; |
| 1112 | struct pci_func *func; |
| 1113 | |
| 1114 | if (!p_slot->ctrl) |
| 1115 | return 1; |
| 1116 | |
| 1117 | /* Check to see if (latch closed, card present, power on) */ |
| 1118 | down(&p_slot->ctrl->crit_sect); |
| 1119 | |
| 1120 | if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) { |
| 1121 | ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| 1122 | if (ret || !getstatus) { |
| 1123 | info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1124 | up(&p_slot->ctrl->crit_sect); |
| 1125 | return 1; |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | if (MRL_SENS(p_slot->ctrl->ctrlcap)) { |
| 1130 | ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| 1131 | if (ret || getstatus) { |
| 1132 | info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1133 | up(&p_slot->ctrl->crit_sect); |
| 1134 | return 1; |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | if (POWER_CTRL(p_slot->ctrl->ctrlcap)) { |
| 1139 | ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| 1140 | if (ret || !getstatus) { |
| 1141 | info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number); |
| 1142 | up(&p_slot->ctrl->crit_sect); |
| 1143 | return 1; |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | up(&p_slot->ctrl->crit_sect); |
| 1148 | |
| 1149 | func = pciehp_slot_find(p_slot->bus, p_slot->device, index++); |
| 1150 | |
| 1151 | /* Make sure there are no video controllers here |
| 1152 | * for all func of p_slot |
| 1153 | */ |
| 1154 | while (func && !rc) { |
| 1155 | pci_bus->number = func->bus; |
| 1156 | devfn = PCI_DEVFN(func->device, func->function); |
| 1157 | |
| 1158 | /* Check the Class Code */ |
| 1159 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); |
| 1160 | if (rc) |
| 1161 | return rc; |
| 1162 | |
| 1163 | if (class_code == PCI_BASE_CLASS_DISPLAY) { |
| 1164 | /* Display/Video adapter (not supported) */ |
| 1165 | rc = REMOVE_NOT_SUPPORTED; |
| 1166 | } else { |
| 1167 | /* See if it's a bridge */ |
| 1168 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); |
| 1169 | if (rc) |
| 1170 | return rc; |
| 1171 | |
| 1172 | /* If it's a bridge, check the VGA Enable bit */ |
| 1173 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { |
| 1174 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR); |
| 1175 | if (rc) |
| 1176 | return rc; |
| 1177 | |
| 1178 | /* If the VGA Enable bit is set, remove isn't supported */ |
| 1179 | if (BCR & PCI_BRIDGE_CTL_VGA) { |
| 1180 | rc = REMOVE_NOT_SUPPORTED; |
| 1181 | } |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | func = pciehp_slot_find(p_slot->bus, p_slot->device, index++); |
| 1186 | } |
| 1187 | |
| 1188 | func = pciehp_slot_find(p_slot->bus, p_slot->device, 0); |
| 1189 | if ((func != NULL) && !rc) { |
| 1190 | rc = remove_board(func, p_slot->ctrl); |
| 1191 | } else if (!rc) |
| 1192 | rc = 1; |
| 1193 | |
| 1194 | if (p_slot) |
| 1195 | update_slot_info(p_slot); |
| 1196 | |
| 1197 | return rc; |
| 1198 | } |
| 1199 | |