2 * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
33 #include <linux/pci.h>
34 #include <linux/acpi.h>
35 #include <acpi/acpi_bus.h>
36 #include <acpi/acpi_drivers.h>
39 #define _COMPONENT ACPI_PCI_COMPONENT
40 ACPI_MODULE_NAME ("pci_bind")
42 struct acpi_pci_data {
43 struct acpi_pci_id id;
50 acpi_pci_data_handler (
55 ACPI_FUNCTION_TRACE("acpi_pci_data_handler");
57 /* TBD: Anything we need to do here? */
66 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
67 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
68 * This typically occurs when resolving PCI operation region information.
70 #ifdef ACPI_FUTURE_USAGE
74 struct acpi_pci_id *id)
77 acpi_status status = AE_OK;
78 struct acpi_device *device = NULL;
79 struct acpi_pci_data *data = NULL;
81 ACPI_FUNCTION_TRACE("acpi_os_get_pci_id");
84 return_ACPI_STATUS(AE_BAD_PARAMETER);
86 result = acpi_bus_get_device(handle, &device);
88 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
89 "Invalid ACPI Bus context for device %s\n",
90 acpi_device_bid(device)));
91 return_ACPI_STATUS(AE_NOT_EXIST);
94 status = acpi_get_data(handle, acpi_pci_data_handler, (void**) &data);
95 if (ACPI_FAILURE(status) || !data || !data->dev) {
96 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
97 "Invalid ACPI-PCI context for device %s\n",
98 acpi_device_bid(device)));
99 return_ACPI_STATUS(status);
105 id->segment = data->id.segment;
106 id->bus = data->id.bus;
107 id->device = data->id.device;
108 id->function = data->id.function;
111 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
112 "Device %s has PCI address %02x:%02x:%02x.%02x\n",
113 acpi_device_bid(device), id->segment, id->bus,
114 id->device, id->function));
116 return_ACPI_STATUS(AE_OK);
118 #endif /* ACPI_FUTURE_USAGE */
123 struct acpi_device *device)
126 acpi_status status = AE_OK;
127 struct acpi_pci_data *data = NULL;
128 struct acpi_pci_data *pdata = NULL;
129 char *pathname = NULL;
130 struct acpi_buffer buffer = {0, NULL};
131 acpi_handle handle = NULL;
135 ACPI_FUNCTION_TRACE("acpi_pci_bind");
137 if (!device || !device->parent)
138 return_VALUE(-EINVAL);
140 pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
142 return_VALUE(-ENOMEM);
143 memset(pathname, 0, ACPI_PATHNAME_MAX);
144 buffer.length = ACPI_PATHNAME_MAX;
145 buffer.pointer = pathname;
147 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
150 return_VALUE(-ENOMEM);
152 memset(data, 0, sizeof(struct acpi_pci_data));
154 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
155 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
161 * These are obtained via the parent device's ACPI-PCI context.
163 status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
165 if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
166 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
167 "Invalid ACPI-PCI context for parent device %s\n",
168 acpi_device_bid(device->parent)));
172 data->id.segment = pdata->id.segment;
173 data->id.bus = pdata->bus->number;
178 * These are simply obtained from the device's _ADR method. Note
179 * that a value of zero is valid.
181 data->id.device = device->pnp.bus_address >> 16;
182 data->id.function = device->pnp.bus_address & 0xFFFF;
184 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
185 data->id.segment, data->id.bus, data->id.device,
189 * TBD: Support slot devices (e.g. function=0xFFFF).
195 * Locate matching device in PCI namespace. If it doesn't exist
196 * this typically means that the device isn't currently inserted
197 * (e.g. docking station, port replicator, etc.).
198 * We cannot simply search the global pci device list, since
199 * PCI devices are added to the global pci list when the root
200 * bridge start ops are run, which may not have happened yet.
202 bus = pci_find_bus(data->id.segment, data->id.bus);
204 list_for_each_entry(dev, &bus->devices, bus_list) {
205 if (dev->devfn == PCI_DEVFN(data->id.device,
206 data->id.function)) {
213 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
214 "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
215 data->id.segment, data->id.bus,
216 data->id.device, data->id.function));
220 if (!data->dev->bus) {
221 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
222 "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
223 data->id.segment, data->id.bus,
224 data->id.device, data->id.function));
232 * If so, set the 'bus' field and install the 'bind' function to
233 * facilitate callbacks for all of its children.
235 if (data->dev->subordinate) {
236 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
237 "Device %02x:%02x:%02x.%02x is a PCI bridge\n",
238 data->id.segment, data->id.bus,
239 data->id.device, data->id.function));
240 data->bus = data->dev->subordinate;
241 device->ops.bind = acpi_pci_bind;
242 device->ops.unbind = acpi_pci_unbind;
246 * Attach ACPI-PCI Context
247 * -----------------------
248 * Thus binding the ACPI and PCI devices.
250 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
251 if (ACPI_FAILURE(status)) {
252 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
253 "Unable to attach ACPI-PCI context to device %s\n",
254 acpi_device_bid(device)));
262 * Evaluate and parse _PRT, if exists. This code is independent of
263 * PCI bridges (above) to allow parsing of _PRT objects within the
264 * scope of non-bridge devices. Note that _PRTs within the scope of
265 * a PCI bridge assume the bridge's subordinate bus number.
267 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
269 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
270 if (ACPI_SUCCESS(status)) {
271 if (data->bus) /* PCI-PCI bridge */
272 acpi_pci_irq_add_prt(device->handle, data->id.segment,
274 else /* non-bridge PCI device */
275 acpi_pci_irq_add_prt(device->handle, data->id.segment,
284 return_VALUE(result);
288 struct acpi_device *device)
291 acpi_status status = AE_OK;
292 struct acpi_pci_data *data = NULL;
293 char *pathname = NULL;
294 struct acpi_buffer buffer = {0, NULL};
296 ACPI_FUNCTION_TRACE("acpi_pci_unbind");
298 if (!device || !device->parent)
299 return_VALUE(-EINVAL);
301 pathname = (char *) kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
303 return_VALUE(-ENOMEM);
304 memset(pathname, 0, ACPI_PATHNAME_MAX);
306 buffer.length = ACPI_PATHNAME_MAX;
307 buffer.pointer = pathname;
308 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
309 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
313 status = acpi_get_data(device->handle, acpi_pci_data_handler, (void**)&data);
314 if (ACPI_FAILURE(status)) {
315 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
316 "Unable to get data from device %s\n",
317 acpi_device_bid(device)));
322 status = acpi_detach_data(device->handle, acpi_pci_data_handler);
323 if (ACPI_FAILURE(status)) {
324 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
325 "Unable to detach data from device %s\n",
326 acpi_device_bid(device)));
330 if (data->dev->subordinate) {
331 acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
336 return_VALUE(result);
341 struct acpi_device *device,
342 struct acpi_pci_id *id,
346 acpi_status status = AE_OK;
347 struct acpi_pci_data *data = NULL;
348 char *pathname = NULL;
349 struct acpi_buffer buffer = {0, NULL};
351 ACPI_FUNCTION_TRACE("acpi_pci_bind_root");
353 pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
355 return_VALUE(-ENOMEM);
356 memset(pathname, 0, ACPI_PATHNAME_MAX);
358 buffer.length = ACPI_PATHNAME_MAX;
359 buffer.pointer = pathname;
361 if (!device || !id || !bus){
363 return_VALUE(-EINVAL);
366 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
369 return_VALUE(-ENOMEM);
371 memset(data, 0, sizeof(struct acpi_pci_data));
375 device->ops.bind = acpi_pci_bind;
376 device->ops.unbind = acpi_pci_unbind;
378 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
380 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
381 "%02x:%02x\n", pathname, id->segment, id->bus));
383 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
384 if (ACPI_FAILURE(status)) {
385 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
386 "Unable to attach ACPI-PCI context to device %s\n",
397 return_VALUE(result);