blob: 2a718df769b546ee533e55dc96fa5e8cdd510625 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/types.h>
30#include <linux/proc_fs.h>
31#include <linux/spinlock.h>
32#include <linux/pm.h>
33#include <linux/pci.h>
34#include <linux/acpi.h>
35#include <acpi/acpi_bus.h>
36#include <acpi/acpi_drivers.h>
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#define _COMPONENT ACPI_PCI_COMPONENT
Len Brown4be44fc2005-08-05 00:44:28 -040039ACPI_MODULE_NAME("pci_bind")
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41struct acpi_pci_data {
Len Brown4be44fc2005-08-05 00:44:28 -040042 struct acpi_pci_id id;
43 struct pci_bus *bus;
44 struct pci_dev *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045};
46
Adrian Bunk8713cbe2005-09-02 17:16:48 -040047static void acpi_pci_data_handler(acpi_handle handle, u32 function,
48 void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049{
50 ACPI_FUNCTION_TRACE("acpi_pci_data_handler");
51
52 /* TBD: Anything we need to do here? */
53
54 return_VOID;
55}
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057/**
Rajesh Shah4ce448e2005-04-28 00:25:53 -070058 * acpi_get_pci_id
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 * ------------------
60 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
61 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
62 * This typically occurs when resolving PCI operation region information.
63 */
Len Brown4be44fc2005-08-05 00:44:28 -040064acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Len Brown4be44fc2005-08-05 00:44:28 -040066 int result = 0;
67 acpi_status status = AE_OK;
68 struct acpi_device *device = NULL;
69 struct acpi_pci_data *data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Rajesh Shah4ce448e2005-04-28 00:25:53 -070071 ACPI_FUNCTION_TRACE("acpi_get_pci_id");
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 if (!id)
74 return_ACPI_STATUS(AE_BAD_PARAMETER);
75
76 result = acpi_bus_get_device(handle, &device);
77 if (result) {
Len Brown4be44fc2005-08-05 00:44:28 -040078 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
79 "Invalid ACPI Bus context for device %s\n",
80 acpi_device_bid(device)));
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 return_ACPI_STATUS(AE_NOT_EXIST);
82 }
83
Len Brown4be44fc2005-08-05 00:44:28 -040084 status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
Rajesh Shah4ce448e2005-04-28 00:25:53 -070085 if (ACPI_FAILURE(status) || !data) {
Len Brown4be44fc2005-08-05 00:44:28 -040086 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
87 "Invalid ACPI-PCI context for device %s\n",
88 acpi_device_bid(device)));
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 return_ACPI_STATUS(status);
90 }
91
92 *id = data->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Len Brown4be44fc2005-08-05 00:44:28 -040094 /*
95 id->segment = data->id.segment;
96 id->bus = data->id.bus;
97 id->device = data->id.device;
98 id->function = data->id.function;
99 */
100
101 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
102 "Device %s has PCI address %02x:%02x:%02x.%02x\n",
103 acpi_device_bid(device), id->segment, id->bus,
104 id->device, id->function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106 return_ACPI_STATUS(AE_OK);
107}
Len Brown4be44fc2005-08-05 00:44:28 -0400108
Rajesh Shah4ce448e2005-04-28 00:25:53 -0700109EXPORT_SYMBOL(acpi_get_pci_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Len Brown4be44fc2005-08-05 00:44:28 -0400111int acpi_pci_bind(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
Len Brown4be44fc2005-08-05 00:44:28 -0400113 int result = 0;
114 acpi_status status = AE_OK;
115 struct acpi_pci_data *data = NULL;
116 struct acpi_pci_data *pdata = NULL;
117 char *pathname = NULL;
118 struct acpi_buffer buffer = { 0, NULL };
119 acpi_handle handle = NULL;
120 struct pci_dev *dev;
121 struct pci_bus *bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 ACPI_FUNCTION_TRACE("acpi_pci_bind");
124
125 if (!device || !device->parent)
126 return_VALUE(-EINVAL);
127
128 pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
Len Brown4be44fc2005-08-05 00:44:28 -0400129 if (!pathname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 return_VALUE(-ENOMEM);
131 memset(pathname, 0, ACPI_PATHNAME_MAX);
132 buffer.length = ACPI_PATHNAME_MAX;
133 buffer.pointer = pathname;
134
135 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
Len Brown4be44fc2005-08-05 00:44:28 -0400136 if (!data) {
137 kfree(pathname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 return_VALUE(-ENOMEM);
139 }
140 memset(data, 0, sizeof(struct acpi_pci_data));
141
142 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
Len Brown4be44fc2005-08-05 00:44:28 -0400143 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
144 pathname));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 /*
147 * Segment & Bus
148 * -------------
149 * These are obtained via the parent device's ACPI-PCI context.
150 */
Len Brown4be44fc2005-08-05 00:44:28 -0400151 status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
152 (void **)&pdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
Len Brown4be44fc2005-08-05 00:44:28 -0400154 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
155 "Invalid ACPI-PCI context for parent device %s\n",
156 acpi_device_bid(device->parent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 result = -ENODEV;
158 goto end;
159 }
160 data->id.segment = pdata->id.segment;
161 data->id.bus = pdata->bus->number;
162
163 /*
164 * Device & Function
165 * -----------------
166 * These are simply obtained from the device's _ADR method. Note
167 * that a value of zero is valid.
168 */
169 data->id.device = device->pnp.bus_address >> 16;
170 data->id.function = device->pnp.bus_address & 0xFFFF;
171
172 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400173 data->id.segment, data->id.bus, data->id.device,
174 data->id.function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 /*
177 * TBD: Support slot devices (e.g. function=0xFFFF).
178 */
179
180 /*
181 * Locate PCI Device
182 * -----------------
183 * Locate matching device in PCI namespace. If it doesn't exist
184 * this typically means that the device isn't currently inserted
185 * (e.g. docking station, port replicator, etc.).
Rajesh Shahc431ada2005-04-28 00:25:45 -0700186 * We cannot simply search the global pci device list, since
187 * PCI devices are added to the global pci list when the root
188 * bridge start ops are run, which may not have happened yet.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 */
Rajesh Shahc431ada2005-04-28 00:25:45 -0700190 bus = pci_find_bus(data->id.segment, data->id.bus);
191 if (bus) {
192 list_for_each_entry(dev, &bus->devices, bus_list) {
193 if (dev->devfn == PCI_DEVFN(data->id.device,
Len Brown4be44fc2005-08-05 00:44:28 -0400194 data->id.function)) {
Rajesh Shahc431ada2005-04-28 00:25:45 -0700195 data->dev = dev;
196 break;
197 }
198 }
199 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (!data->dev) {
Len Brown4be44fc2005-08-05 00:44:28 -0400201 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
202 "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
203 data->id.segment, data->id.bus,
204 data->id.device, data->id.function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 result = -ENODEV;
206 goto end;
207 }
208 if (!data->dev->bus) {
Len Brown4be44fc2005-08-05 00:44:28 -0400209 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
210 "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
211 data->id.segment, data->id.bus,
212 data->id.device, data->id.function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 result = -ENODEV;
214 goto end;
215 }
216
217 /*
218 * PCI Bridge?
219 * -----------
220 * If so, set the 'bus' field and install the 'bind' function to
221 * facilitate callbacks for all of its children.
222 */
223 if (data->dev->subordinate) {
Len Brown4be44fc2005-08-05 00:44:28 -0400224 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
225 "Device %02x:%02x:%02x.%02x is a PCI bridge\n",
226 data->id.segment, data->id.bus,
227 data->id.device, data->id.function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 data->bus = data->dev->subordinate;
229 device->ops.bind = acpi_pci_bind;
230 device->ops.unbind = acpi_pci_unbind;
231 }
232
233 /*
234 * Attach ACPI-PCI Context
235 * -----------------------
236 * Thus binding the ACPI and PCI devices.
237 */
238 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
239 if (ACPI_FAILURE(status)) {
240 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
Len Brown4be44fc2005-08-05 00:44:28 -0400241 "Unable to attach ACPI-PCI context to device %s\n",
242 acpi_device_bid(device)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 result = -ENODEV;
244 goto end;
245 }
246
247 /*
248 * PCI Routing Table
249 * -----------------
250 * Evaluate and parse _PRT, if exists. This code is independent of
251 * PCI bridges (above) to allow parsing of _PRT objects within the
252 * scope of non-bridge devices. Note that _PRTs within the scope of
253 * a PCI bridge assume the bridge's subordinate bus number.
254 *
255 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
256 */
257 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
258 if (ACPI_SUCCESS(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400259 if (data->bus) /* PCI-PCI bridge */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 acpi_pci_irq_add_prt(device->handle, data->id.segment,
Len Brown4be44fc2005-08-05 00:44:28 -0400261 data->bus->number);
262 else /* non-bridge PCI device */
263 acpi_pci_irq_add_prt(device->handle, data->id.segment,
264 data->id.bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 }
266
Len Brown4be44fc2005-08-05 00:44:28 -0400267 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 kfree(pathname);
269 if (result)
270 kfree(data);
271
272 return_VALUE(result);
273}
274
Len Brown4be44fc2005-08-05 00:44:28 -0400275int acpi_pci_unbind(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Len Brown4be44fc2005-08-05 00:44:28 -0400277 int result = 0;
278 acpi_status status = AE_OK;
279 struct acpi_pci_data *data = NULL;
280 char *pathname = NULL;
281 struct acpi_buffer buffer = { 0, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283 ACPI_FUNCTION_TRACE("acpi_pci_unbind");
284
285 if (!device || !device->parent)
286 return_VALUE(-EINVAL);
287
Len Brown4be44fc2005-08-05 00:44:28 -0400288 pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
289 if (!pathname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 return_VALUE(-ENOMEM);
291 memset(pathname, 0, ACPI_PATHNAME_MAX);
292
293 buffer.length = ACPI_PATHNAME_MAX;
294 buffer.pointer = pathname;
295 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
296 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400297 pathname));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 kfree(pathname);
299
Len Brown4be44fc2005-08-05 00:44:28 -0400300 status =
301 acpi_get_data(device->handle, acpi_pci_data_handler,
302 (void **)&data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 if (ACPI_FAILURE(status)) {
304 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
Len Brown4be44fc2005-08-05 00:44:28 -0400305 "Unable to get data from device %s\n",
306 acpi_device_bid(device)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 result = -ENODEV;
308 goto end;
309 }
310
311 status = acpi_detach_data(device->handle, acpi_pci_data_handler);
312 if (ACPI_FAILURE(status)) {
313 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
Len Brown4be44fc2005-08-05 00:44:28 -0400314 "Unable to detach data from device %s\n",
315 acpi_device_bid(device)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 result = -ENODEV;
317 goto end;
318 }
319 if (data->dev->subordinate) {
320 acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
321 }
322 kfree(data);
323
Len Brown4be44fc2005-08-05 00:44:28 -0400324 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return_VALUE(result);
326}
327
Len Brown4be44fc2005-08-05 00:44:28 -0400328int
329acpi_pci_bind_root(struct acpi_device *device,
330 struct acpi_pci_id *id, struct pci_bus *bus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
Len Brown4be44fc2005-08-05 00:44:28 -0400332 int result = 0;
333 acpi_status status = AE_OK;
334 struct acpi_pci_data *data = NULL;
335 char *pathname = NULL;
336 struct acpi_buffer buffer = { 0, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 ACPI_FUNCTION_TRACE("acpi_pci_bind_root");
339
340 pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
Len Brown4be44fc2005-08-05 00:44:28 -0400341 if (!pathname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 return_VALUE(-ENOMEM);
343 memset(pathname, 0, ACPI_PATHNAME_MAX);
344
345 buffer.length = ACPI_PATHNAME_MAX;
346 buffer.pointer = pathname;
347
Len Brown4be44fc2005-08-05 00:44:28 -0400348 if (!device || !id || !bus) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 kfree(pathname);
350 return_VALUE(-EINVAL);
351 }
352
353 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
Len Brown4be44fc2005-08-05 00:44:28 -0400354 if (!data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 kfree(pathname);
356 return_VALUE(-ENOMEM);
357 }
358 memset(data, 0, sizeof(struct acpi_pci_data));
359
360 data->id = *id;
361 data->bus = bus;
362 device->ops.bind = acpi_pci_bind;
363 device->ops.unbind = acpi_pci_unbind;
364
365 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
366
367 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
Len Brown4be44fc2005-08-05 00:44:28 -0400368 "%02x:%02x\n", pathname, id->segment, id->bus));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
371 if (ACPI_FAILURE(status)) {
372 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
Len Brown4be44fc2005-08-05 00:44:28 -0400373 "Unable to attach ACPI-PCI context to device %s\n",
374 pathname));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 result = -ENODEV;
376 goto end;
377 }
378
Len Brown4be44fc2005-08-05 00:44:28 -0400379 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 kfree(pathname);
381 if (result != 0)
382 kfree(data);
383
384 return_VALUE(result);
385}