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[ACPI_PATHNAME_MAX] = {0};
130 struct acpi_buffer buffer = {ACPI_PATHNAME_MAX, pathname};
131 acpi_handle handle = NULL;
133 ACPI_FUNCTION_TRACE("acpi_pci_bind");
135 if (!device || !device->parent)
136 return_VALUE(-EINVAL);
138 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
140 return_VALUE(-ENOMEM);
141 memset(data, 0, sizeof(struct acpi_pci_data));
143 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
144 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
150 * These are obtained via the parent device's ACPI-PCI context.
152 status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
154 if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
155 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
156 "Invalid ACPI-PCI context for parent device %s\n",
157 acpi_device_bid(device->parent)));
161 data->id.segment = pdata->id.segment;
162 data->id.bus = pdata->bus->number;
167 * These are simply obtained from the device's _ADR method. Note
168 * that a value of zero is valid.
170 data->id.device = device->pnp.bus_address >> 16;
171 data->id.function = device->pnp.bus_address & 0xFFFF;
173 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
174 data->id.segment, data->id.bus, data->id.device,
178 * TBD: Support slot devices (e.g. function=0xFFFF).
184 * Locate matching device in PCI namespace. If it doesn't exist
185 * this typically means that the device isn't currently inserted
186 * (e.g. docking station, port replicator, etc.).
188 data->dev = pci_find_slot(data->id.bus, PCI_DEVFN(data->id.device, data->id.function));
190 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
191 "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
192 data->id.segment, data->id.bus,
193 data->id.device, data->id.function));
197 if (!data->dev->bus) {
198 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
199 "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
200 data->id.segment, data->id.bus,
201 data->id.device, data->id.function));
209 * If so, set the 'bus' field and install the 'bind' function to
210 * facilitate callbacks for all of its children.
212 if (data->dev->subordinate) {
213 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
214 "Device %02x:%02x:%02x.%02x is a PCI bridge\n",
215 data->id.segment, data->id.bus,
216 data->id.device, data->id.function));
217 data->bus = data->dev->subordinate;
218 device->ops.bind = acpi_pci_bind;
222 * Attach ACPI-PCI Context
223 * -----------------------
224 * Thus binding the ACPI and PCI devices.
226 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
227 if (ACPI_FAILURE(status)) {
228 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
229 "Unable to attach ACPI-PCI context to device %s\n",
230 acpi_device_bid(device)));
238 * Evaluate and parse _PRT, if exists. This code is independent of
239 * PCI bridges (above) to allow parsing of _PRT objects within the
240 * scope of non-bridge devices. Note that _PRTs within the scope of
241 * a PCI bridge assume the bridge's subordinate bus number.
243 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
245 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
246 if (ACPI_SUCCESS(status)) {
247 if (data->bus) /* PCI-PCI bridge */
248 acpi_pci_irq_add_prt(device->handle, data->id.segment,
250 else /* non-bridge PCI device */
251 acpi_pci_irq_add_prt(device->handle, data->id.segment,
259 return_VALUE(result);
265 struct acpi_device *device,
266 struct acpi_pci_id *id,
270 acpi_status status = AE_OK;
271 struct acpi_pci_data *data = NULL;
272 char pathname[ACPI_PATHNAME_MAX] = {0};
273 struct acpi_buffer buffer = {ACPI_PATHNAME_MAX, pathname};
275 ACPI_FUNCTION_TRACE("acpi_pci_bind_root");
277 if (!device || !id || !bus)
278 return_VALUE(-EINVAL);
280 data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
282 return_VALUE(-ENOMEM);
283 memset(data, 0, sizeof(struct acpi_pci_data));
287 device->ops.bind = acpi_pci_bind;
289 acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
291 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
292 "%02x:%02x\n", pathname, id->segment, id->bus));
294 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
295 if (ACPI_FAILURE(status)) {
296 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
297 "Unable to attach ACPI-PCI context to device %s\n",
307 return_VALUE(result);