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/moduleparam.h> |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/proc_fs.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/workqueue.h> |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | #include "pciehp.h" |
| 42 | #include "pciehprm.h" |
| 43 | #include <linux/interrupt.h> |
| 44 | |
| 45 | /* Global variables */ |
| 46 | int pciehp_debug; |
| 47 | int pciehp_poll_mode; |
| 48 | int pciehp_poll_time; |
| 49 | struct controller *pciehp_ctrl_list; |
| 50 | struct pci_func *pciehp_slot_list[256]; |
| 51 | |
| 52 | #define DRIVER_VERSION "0.4" |
| 53 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" |
| 54 | #define DRIVER_DESC "PCI Express Hot Plug Controller Driver" |
| 55 | |
| 56 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 57 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 58 | MODULE_LICENSE("GPL"); |
| 59 | |
| 60 | module_param(pciehp_debug, bool, 0644); |
| 61 | module_param(pciehp_poll_mode, bool, 0644); |
| 62 | module_param(pciehp_poll_time, int, 0644); |
| 63 | MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not"); |
| 64 | MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not"); |
| 65 | MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds"); |
| 66 | |
| 67 | #define PCIE_MODULE_NAME "pciehp" |
| 68 | |
| 69 | static int pcie_start_thread (void); |
| 70 | static int set_attention_status (struct hotplug_slot *slot, u8 value); |
| 71 | static int enable_slot (struct hotplug_slot *slot); |
| 72 | static int disable_slot (struct hotplug_slot *slot); |
| 73 | static int get_power_status (struct hotplug_slot *slot, u8 *value); |
| 74 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); |
| 75 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); |
| 76 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); |
| 77 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 78 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 79 | |
| 80 | static struct hotplug_slot_ops pciehp_hotplug_slot_ops = { |
| 81 | .owner = THIS_MODULE, |
| 82 | .set_attention_status = set_attention_status, |
| 83 | .enable_slot = enable_slot, |
| 84 | .disable_slot = disable_slot, |
| 85 | .get_power_status = get_power_status, |
| 86 | .get_attention_status = get_attention_status, |
| 87 | .get_latch_status = get_latch_status, |
| 88 | .get_adapter_status = get_adapter_status, |
| 89 | .get_max_bus_speed = get_max_bus_speed, |
| 90 | .get_cur_bus_speed = get_cur_bus_speed, |
| 91 | }; |
| 92 | |
Dely Sy | b308240 | 2005-04-28 18:08:53 -0700 | [diff] [blame] | 93 | /** |
| 94 | * release_slot - free up the memory used by a slot |
| 95 | * @hotplug_slot: slot to free |
| 96 | */ |
| 97 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 98 | { |
| 99 | struct slot *slot = hotplug_slot->private; |
| 100 | |
| 101 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 102 | |
| 103 | kfree(slot->hotplug_slot->info); |
| 104 | kfree(slot->hotplug_slot->name); |
| 105 | kfree(slot->hotplug_slot); |
| 106 | kfree(slot); |
| 107 | } |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | static int init_slots(struct controller *ctrl) |
| 110 | { |
| 111 | struct slot *new_slot; |
| 112 | u8 number_of_slots; |
| 113 | u8 slot_device; |
| 114 | u32 slot_number; |
| 115 | int result = -ENOMEM; |
| 116 | |
| 117 | dbg("%s\n",__FUNCTION__); |
| 118 | |
| 119 | number_of_slots = ctrl->num_slots; |
| 120 | slot_device = ctrl->slot_device_offset; |
| 121 | slot_number = ctrl->first_slot; |
| 122 | |
| 123 | while (number_of_slots) { |
| 124 | new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL); |
| 125 | if (!new_slot) |
| 126 | goto error; |
| 127 | |
| 128 | memset(new_slot, 0, sizeof(struct slot)); |
| 129 | new_slot->hotplug_slot = |
| 130 | kmalloc(sizeof(*(new_slot->hotplug_slot)), |
| 131 | GFP_KERNEL); |
| 132 | if (!new_slot->hotplug_slot) |
| 133 | goto error_slot; |
| 134 | memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot)); |
| 135 | |
| 136 | new_slot->hotplug_slot->info = |
| 137 | kmalloc(sizeof(*(new_slot->hotplug_slot->info)), |
| 138 | GFP_KERNEL); |
| 139 | if (!new_slot->hotplug_slot->info) |
| 140 | goto error_hpslot; |
| 141 | memset(new_slot->hotplug_slot->info, 0, |
| 142 | sizeof(struct hotplug_slot_info)); |
| 143 | new_slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, |
| 144 | GFP_KERNEL); |
| 145 | if (!new_slot->hotplug_slot->name) |
| 146 | goto error_info; |
| 147 | |
| 148 | new_slot->ctrl = ctrl; |
| 149 | new_slot->bus = ctrl->slot_bus; |
| 150 | new_slot->device = slot_device; |
| 151 | new_slot->hpc_ops = ctrl->hpc_ops; |
| 152 | |
| 153 | new_slot->number = ctrl->first_slot; |
| 154 | new_slot->hp_slot = slot_device - ctrl->slot_device_offset; |
| 155 | |
| 156 | /* register this slot with the hotplug pci core */ |
| 157 | new_slot->hotplug_slot->private = new_slot; |
Dely Sy | b308240 | 2005-04-28 18:08:53 -0700 | [diff] [blame] | 158 | new_slot->hotplug_slot->release = &release_slot; |
| 159 | make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | new_slot->hotplug_slot->ops = &pciehp_hotplug_slot_ops; |
| 161 | |
| 162 | new_slot->hpc_ops->get_power_status(new_slot, &(new_slot->hotplug_slot->info->power_status)); |
| 163 | new_slot->hpc_ops->get_attention_status(new_slot, &(new_slot->hotplug_slot->info->attention_status)); |
| 164 | new_slot->hpc_ops->get_latch_status(new_slot, &(new_slot->hotplug_slot->info->latch_status)); |
| 165 | new_slot->hpc_ops->get_adapter_status(new_slot, &(new_slot->hotplug_slot->info->adapter_status)); |
| 166 | |
| 167 | dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n", |
| 168 | new_slot->bus, new_slot->device, new_slot->hp_slot, new_slot->number, ctrl->slot_device_offset); |
| 169 | result = pci_hp_register (new_slot->hotplug_slot); |
| 170 | if (result) { |
| 171 | err ("pci_hp_register failed with error %d\n", result); |
| 172 | goto error_name; |
| 173 | } |
| 174 | |
| 175 | new_slot->next = ctrl->slot; |
| 176 | ctrl->slot = new_slot; |
| 177 | |
| 178 | number_of_slots--; |
| 179 | slot_device++; |
| 180 | slot_number += ctrl->slot_num_inc; |
| 181 | } |
| 182 | |
| 183 | return 0; |
| 184 | |
| 185 | error_name: |
| 186 | kfree(new_slot->hotplug_slot->name); |
| 187 | error_info: |
| 188 | kfree(new_slot->hotplug_slot->info); |
| 189 | error_hpslot: |
| 190 | kfree(new_slot->hotplug_slot); |
| 191 | error_slot: |
| 192 | kfree(new_slot); |
| 193 | error: |
| 194 | return result; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | static int cleanup_slots (struct controller * ctrl) |
| 199 | { |
| 200 | struct slot *old_slot, *next_slot; |
| 201 | |
| 202 | old_slot = ctrl->slot; |
| 203 | ctrl->slot = NULL; |
| 204 | |
| 205 | while (old_slot) { |
| 206 | next_slot = old_slot->next; |
| 207 | pci_hp_deregister (old_slot->hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | old_slot = next_slot; |
| 209 | } |
| 210 | |
| 211 | |
| 212 | return(0); |
| 213 | } |
| 214 | |
| 215 | static int get_ctlr_slot_config(struct controller *ctrl) |
| 216 | { |
| 217 | int num_ctlr_slots; /* Not needed; PCI Express has 1 slot per port*/ |
| 218 | int first_device_num; /* Not needed */ |
| 219 | int physical_slot_num; |
| 220 | u8 ctrlcap; |
| 221 | int rc; |
| 222 | |
| 223 | rc = pcie_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, &ctrlcap); |
| 224 | if (rc) { |
| 225 | err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__, ctrl->bus, ctrl->device); |
| 226 | return (-1); |
| 227 | } |
| 228 | |
| 229 | ctrl->num_slots = num_ctlr_slots; /* PCI Express has 1 slot per port */ |
| 230 | ctrl->slot_device_offset = first_device_num; |
| 231 | ctrl->first_slot = physical_slot_num; |
| 232 | ctrl->ctrlcap = ctrlcap; |
| 233 | |
| 234 | dbg("%s: bus(0x%x) num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) ctrlcap(%x) for b:d (%x:%x)\n", |
| 235 | __FUNCTION__, ctrl->slot_bus, num_ctlr_slots, first_device_num, physical_slot_num, ctrlcap, |
| 236 | ctrl->bus, ctrl->device); |
| 237 | |
| 238 | return (0); |
| 239 | } |
| 240 | |
| 241 | |
| 242 | /* |
| 243 | * set_attention_status - Turns the Amber LED for a slot on, off or blink |
| 244 | */ |
| 245 | static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 246 | { |
| 247 | struct slot *slot = hotplug_slot->private; |
| 248 | |
| 249 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 250 | |
| 251 | hotplug_slot->info->attention_status = status; |
| 252 | |
| 253 | if (ATTN_LED(slot->ctrl->ctrlcap)) |
| 254 | slot->hpc_ops->set_attention_status(slot, status); |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | static int enable_slot(struct hotplug_slot *hotplug_slot) |
| 261 | { |
| 262 | struct slot *slot = hotplug_slot->private; |
| 263 | |
| 264 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 265 | |
| 266 | return pciehp_enable_slot(slot); |
| 267 | } |
| 268 | |
| 269 | |
| 270 | static int disable_slot(struct hotplug_slot *hotplug_slot) |
| 271 | { |
| 272 | struct slot *slot = hotplug_slot->private; |
| 273 | |
| 274 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 275 | |
| 276 | return pciehp_disable_slot(slot); |
| 277 | } |
| 278 | |
| 279 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) |
| 280 | { |
| 281 | struct slot *slot = hotplug_slot->private; |
| 282 | int retval; |
| 283 | |
| 284 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 285 | |
| 286 | retval = slot->hpc_ops->get_power_status(slot, value); |
| 287 | if (retval < 0) |
| 288 | *value = hotplug_slot->info->power_status; |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) |
| 294 | { |
| 295 | struct slot *slot = hotplug_slot->private; |
| 296 | int retval; |
| 297 | |
| 298 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 299 | |
| 300 | retval = slot->hpc_ops->get_attention_status(slot, value); |
| 301 | if (retval < 0) |
| 302 | *value = hotplug_slot->info->attention_status; |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) |
| 308 | { |
| 309 | struct slot *slot = hotplug_slot->private; |
| 310 | int retval; |
| 311 | |
| 312 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 313 | |
| 314 | retval = slot->hpc_ops->get_latch_status(slot, value); |
| 315 | if (retval < 0) |
| 316 | *value = hotplug_slot->info->latch_status; |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) |
| 322 | { |
| 323 | struct slot *slot = hotplug_slot->private; |
| 324 | int retval; |
| 325 | |
| 326 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 327 | |
| 328 | retval = slot->hpc_ops->get_adapter_status(slot, value); |
| 329 | if (retval < 0) |
| 330 | *value = hotplug_slot->info->adapter_status; |
| 331 | |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) |
| 336 | { |
| 337 | struct slot *slot = hotplug_slot->private; |
| 338 | int retval; |
| 339 | |
| 340 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 341 | |
| 342 | retval = slot->hpc_ops->get_max_bus_speed(slot, value); |
| 343 | if (retval < 0) |
| 344 | *value = PCI_SPEED_UNKNOWN; |
| 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) |
| 350 | { |
| 351 | struct slot *slot = hotplug_slot->private; |
| 352 | int retval; |
| 353 | |
| 354 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 355 | |
| 356 | retval = slot->hpc_ops->get_cur_bus_speed(slot, value); |
| 357 | if (retval < 0) |
| 358 | *value = PCI_SPEED_UNKNOWN; |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_id *id) |
| 364 | { |
| 365 | int rc; |
| 366 | struct controller *ctrl; |
| 367 | struct slot *t_slot; |
| 368 | int first_device_num = 0 ; /* first PCI device number supported by this PCIE */ |
| 369 | int num_ctlr_slots; /* number of slots supported by this HPC */ |
| 370 | u8 value; |
| 371 | struct pci_dev *pdev; |
| 372 | |
| 373 | dbg("%s: Called by hp_drv\n", __FUNCTION__); |
| 374 | ctrl = kmalloc(sizeof(*ctrl), GFP_KERNEL); |
| 375 | if (!ctrl) { |
| 376 | err("%s : out of memory\n", __FUNCTION__); |
| 377 | goto err_out_none; |
| 378 | } |
| 379 | memset(ctrl, 0, sizeof(struct controller)); |
| 380 | |
| 381 | dbg("%s: DRV_thread pid = %d\n", __FUNCTION__, current->pid); |
| 382 | |
| 383 | pdev = dev->port; |
| 384 | |
| 385 | rc = pcie_init(ctrl, dev, |
| 386 | (php_intr_callback_t) pciehp_handle_attention_button, |
| 387 | (php_intr_callback_t) pciehp_handle_switch_change, |
| 388 | (php_intr_callback_t) pciehp_handle_presence_change, |
| 389 | (php_intr_callback_t) pciehp_handle_power_fault); |
| 390 | if (rc) { |
| 391 | dbg("%s: controller initialization failed\n", PCIE_MODULE_NAME); |
| 392 | goto err_out_free_ctrl; |
| 393 | } |
| 394 | |
| 395 | ctrl->pci_dev = pdev; |
| 396 | |
| 397 | pci_set_drvdata(pdev, ctrl); |
| 398 | |
| 399 | ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); |
| 400 | if (!ctrl->pci_bus) { |
| 401 | err("%s: out of memory\n", __FUNCTION__); |
| 402 | rc = -ENOMEM; |
| 403 | goto err_out_unmap_mmio_region; |
| 404 | } |
| 405 | dbg("%s: ctrl->pci_bus %p\n", __FUNCTION__, ctrl->pci_bus); |
| 406 | memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus)); |
| 407 | ctrl->bus = pdev->bus->number; /* ctrl bus */ |
| 408 | ctrl->slot_bus = pdev->subordinate->number; /* bus controlled by this HPC */ |
| 409 | |
| 410 | ctrl->device = PCI_SLOT(pdev->devfn); |
| 411 | ctrl->function = PCI_FUNC(pdev->devfn); |
| 412 | dbg("%s: ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", __FUNCTION__, |
| 413 | ctrl->bus, ctrl->device, ctrl->function, pdev->irq); |
| 414 | |
| 415 | /* |
| 416 | * Save configuration headers for this and subordinate PCI buses |
| 417 | */ |
| 418 | |
| 419 | rc = get_ctlr_slot_config(ctrl); |
| 420 | if (rc) { |
| 421 | err(msg_initialization_err, rc); |
| 422 | goto err_out_free_ctrl_bus; |
| 423 | } |
| 424 | first_device_num = ctrl->slot_device_offset; |
| 425 | num_ctlr_slots = ctrl->num_slots; |
| 426 | |
| 427 | /* Store PCI Config Space for all devices on this bus */ |
| 428 | dbg("%s: Before calling pciehp_save_config, ctrl->bus %x,ctrl->slot_bus %x\n", |
| 429 | __FUNCTION__,ctrl->bus, ctrl->slot_bus); |
| 430 | rc = pciehp_save_config(ctrl, ctrl->slot_bus, num_ctlr_slots, first_device_num); |
| 431 | if (rc) { |
| 432 | err("%s: unable to save PCI configuration data, error %d\n", __FUNCTION__, rc); |
| 433 | goto err_out_free_ctrl_bus; |
| 434 | } |
| 435 | |
| 436 | /* Get IO, memory, and IRQ resources for new devices */ |
| 437 | rc = pciehprm_find_available_resources(ctrl); |
| 438 | ctrl->add_support = !rc; |
| 439 | |
| 440 | if (rc) { |
| 441 | dbg("pciehprm_find_available_resources = %#x\n", rc); |
| 442 | err("unable to locate PCI configuration resources for hot plug add.\n"); |
| 443 | goto err_out_free_ctrl_bus; |
| 444 | } |
| 445 | |
| 446 | /* Setup the slot information structures */ |
| 447 | rc = init_slots(ctrl); |
| 448 | if (rc) { |
| 449 | err(msg_initialization_err, 6); |
| 450 | goto err_out_free_ctrl_slot; |
| 451 | } |
| 452 | |
| 453 | t_slot = pciehp_find_slot(ctrl, first_device_num); |
| 454 | dbg("%s: t_slot %p\n", __FUNCTION__, t_slot); |
| 455 | |
| 456 | /* Finish setting up the hot plug ctrl device */ |
| 457 | ctrl->next_event = 0; |
| 458 | |
| 459 | if (!pciehp_ctrl_list) { |
| 460 | pciehp_ctrl_list = ctrl; |
| 461 | ctrl->next = NULL; |
| 462 | } else { |
| 463 | ctrl->next = pciehp_ctrl_list; |
| 464 | pciehp_ctrl_list = ctrl; |
| 465 | } |
| 466 | |
| 467 | /* Wait for exclusive access to hardware */ |
| 468 | down(&ctrl->crit_sect); |
| 469 | |
| 470 | t_slot->hpc_ops->get_adapter_status(t_slot, &value); /* Check if slot is occupied */ |
| 471 | dbg("%s: adpater value %x\n", __FUNCTION__, value); |
| 472 | |
| 473 | if ((POWER_CTRL(ctrl->ctrlcap)) && !value) { |
| 474 | rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/ |
| 475 | if (rc) { |
| 476 | /* Done with exclusive hardware access */ |
| 477 | up(&ctrl->crit_sect); |
| 478 | goto err_out_free_ctrl_slot; |
| 479 | } else |
| 480 | /* Wait for the command to complete */ |
| 481 | wait_for_ctrl_irq (ctrl); |
| 482 | } |
| 483 | |
| 484 | /* Done with exclusive hardware access */ |
| 485 | up(&ctrl->crit_sect); |
| 486 | |
| 487 | return 0; |
| 488 | |
| 489 | err_out_free_ctrl_slot: |
| 490 | cleanup_slots(ctrl); |
| 491 | err_out_free_ctrl_bus: |
| 492 | kfree(ctrl->pci_bus); |
| 493 | err_out_unmap_mmio_region: |
| 494 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 495 | err_out_free_ctrl: |
| 496 | kfree(ctrl); |
| 497 | err_out_none: |
| 498 | return -ENODEV; |
| 499 | } |
| 500 | |
| 501 | |
| 502 | static int pcie_start_thread(void) |
| 503 | { |
| 504 | int loop; |
| 505 | int retval = 0; |
| 506 | |
| 507 | dbg("Initialize + Start the notification/polling mechanism \n"); |
| 508 | |
| 509 | retval = pciehp_event_start_thread(); |
| 510 | if (retval) { |
| 511 | dbg("pciehp_event_start_thread() failed\n"); |
| 512 | return retval; |
| 513 | } |
| 514 | |
| 515 | dbg("Initialize slot lists\n"); |
| 516 | /* One slot list for each bus in the system */ |
| 517 | for (loop = 0; loop < 256; loop++) { |
| 518 | pciehp_slot_list[loop] = NULL; |
| 519 | } |
| 520 | |
| 521 | return retval; |
| 522 | } |
| 523 | |
| 524 | static inline void __exit |
| 525 | free_pciehp_res(struct pci_resource *res) |
| 526 | { |
| 527 | struct pci_resource *tres; |
| 528 | |
| 529 | while (res) { |
| 530 | tres = res; |
| 531 | res = res->next; |
| 532 | kfree(tres); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | static void __exit unload_pciehpd(void) |
| 537 | { |
| 538 | struct pci_func *next; |
| 539 | struct pci_func *TempSlot; |
| 540 | int loop; |
| 541 | struct controller *ctrl; |
| 542 | struct controller *tctrl; |
| 543 | |
| 544 | ctrl = pciehp_ctrl_list; |
| 545 | |
| 546 | while (ctrl) { |
| 547 | cleanup_slots(ctrl); |
| 548 | |
| 549 | free_pciehp_res(ctrl->io_head); |
| 550 | free_pciehp_res(ctrl->mem_head); |
| 551 | free_pciehp_res(ctrl->p_mem_head); |
| 552 | free_pciehp_res(ctrl->bus_head); |
| 553 | |
| 554 | kfree (ctrl->pci_bus); |
| 555 | |
| 556 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 557 | |
| 558 | tctrl = ctrl; |
| 559 | ctrl = ctrl->next; |
| 560 | |
| 561 | kfree(tctrl); |
| 562 | } |
| 563 | |
| 564 | for (loop = 0; loop < 256; loop++) { |
| 565 | next = pciehp_slot_list[loop]; |
| 566 | while (next != NULL) { |
| 567 | free_pciehp_res(next->io_head); |
| 568 | free_pciehp_res(next->mem_head); |
| 569 | free_pciehp_res(next->p_mem_head); |
| 570 | free_pciehp_res(next->bus_head); |
| 571 | |
| 572 | TempSlot = next; |
| 573 | next = next->next; |
| 574 | kfree(TempSlot); |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* Stop the notification mechanism */ |
| 579 | pciehp_event_stop_thread(); |
| 580 | |
| 581 | } |
| 582 | |
| 583 | int hpdriver_context = 0; |
| 584 | |
| 585 | static void pciehp_remove (struct pcie_device *device) |
| 586 | { |
| 587 | printk("%s ENTRY\n", __FUNCTION__); |
| 588 | printk("%s -> Call free_irq for irq = %d\n", |
| 589 | __FUNCTION__, device->irq); |
| 590 | free_irq(device->irq, &hpdriver_context); |
| 591 | } |
| 592 | |
| 593 | #ifdef CONFIG_PM |
Pavel Machek | 7f4927c | 2005-04-16 15:25:33 -0700 | [diff] [blame] | 594 | static int pciehp_suspend (struct pcie_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | { |
| 596 | printk("%s ENTRY\n", __FUNCTION__); |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | static int pciehp_resume (struct pcie_device *dev) |
| 601 | { |
| 602 | printk("%s ENTRY\n", __FUNCTION__); |
| 603 | return 0; |
| 604 | } |
| 605 | #endif |
| 606 | |
| 607 | static struct pcie_port_service_id port_pci_ids[] = { { |
| 608 | .vendor = PCI_ANY_ID, |
| 609 | .device = PCI_ANY_ID, |
Dely Sy | 8b245e4 | 2005-05-06 17:19:09 -0700 | [diff] [blame] | 610 | .port_type = PCIE_ANY_PORT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | .service_type = PCIE_PORT_SERVICE_HP, |
| 612 | .driver_data = 0, |
| 613 | }, { /* end: all zeroes */ } |
| 614 | }; |
| 615 | static const char device_name[] = "hpdriver"; |
| 616 | |
| 617 | static struct pcie_port_service_driver hpdriver_portdrv = { |
| 618 | .name = (char *)device_name, |
| 619 | .id_table = &port_pci_ids[0], |
| 620 | |
| 621 | .probe = pciehp_probe, |
| 622 | .remove = pciehp_remove, |
| 623 | |
| 624 | #ifdef CONFIG_PM |
| 625 | .suspend = pciehp_suspend, |
| 626 | .resume = pciehp_resume, |
| 627 | #endif /* PM */ |
| 628 | }; |
| 629 | |
| 630 | static int __init pcied_init(void) |
| 631 | { |
| 632 | int retval = 0; |
| 633 | |
| 634 | #ifdef CONFIG_HOTPLUG_PCI_PCIE_POLL_EVENT_MODE |
| 635 | pciehp_poll_mode = 1; |
| 636 | #endif |
| 637 | |
| 638 | retval = pcie_start_thread(); |
| 639 | if (retval) |
| 640 | goto error_hpc_init; |
| 641 | |
| 642 | retval = pciehprm_init(PCI); |
| 643 | if (!retval) { |
| 644 | retval = pcie_port_service_register(&hpdriver_portdrv); |
| 645 | dbg("pcie_port_service_register = %d\n", retval); |
| 646 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
| 647 | if (retval) |
| 648 | dbg("%s: Failure to register service\n", __FUNCTION__); |
| 649 | } |
| 650 | |
| 651 | error_hpc_init: |
| 652 | if (retval) { |
| 653 | pciehprm_cleanup(); |
| 654 | pciehp_event_stop_thread(); |
| 655 | } else |
| 656 | pciehprm_print_pirt(); |
| 657 | |
| 658 | return retval; |
| 659 | } |
| 660 | |
| 661 | static void __exit pcied_cleanup(void) |
| 662 | { |
| 663 | dbg("unload_pciehpd()\n"); |
| 664 | unload_pciehpd(); |
| 665 | |
| 666 | pciehprm_cleanup(); |
| 667 | |
| 668 | dbg("pcie_port_service_unregister\n"); |
| 669 | pcie_port_service_unregister(&hpdriver_portdrv); |
| 670 | |
| 671 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
| 672 | } |
| 673 | |
| 674 | module_init(pcied_init); |
| 675 | module_exit(pcied_cleanup); |