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>
38 #define _COMPONENT ACPI_PCI_COMPONENT
39 ACPI_MODULE_NAME("pci_bind");
41 struct acpi_pci_data
{
42 struct acpi_pci_id id
;
47 static void acpi_pci_data_handler(acpi_handle handle
, u32 function
,
51 /* TBD: Anything we need to do here? */
59 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
60 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
61 * This typically occurs when resolving PCI operation region information.
63 acpi_status
acpi_get_pci_id(acpi_handle handle
, struct acpi_pci_id
*id
)
66 acpi_status status
= AE_OK
;
67 struct acpi_device
*device
= NULL
;
68 struct acpi_pci_data
*data
= NULL
;
72 return AE_BAD_PARAMETER
;
74 result
= acpi_bus_get_device(handle
, &device
);
76 printk(KERN_ERR PREFIX
77 "Invalid ACPI Bus context for device %s\n",
78 acpi_device_bid(device
));
82 status
= acpi_get_data(handle
, acpi_pci_data_handler
, (void **)&data
);
83 if (ACPI_FAILURE(status
) || !data
) {
84 ACPI_EXCEPTION((AE_INFO
, status
,
85 "Invalid ACPI-PCI context for device %s",
86 acpi_device_bid(device
)));
93 id->segment = data->id.segment;
94 id->bus = data->id.bus;
95 id->device = data->id.device;
96 id->function = data->id.function;
99 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
100 "Device %s has PCI address %02x:%02x:%02x.%02x\n",
101 acpi_device_bid(device
), id
->segment
, id
->bus
,
102 id
->device
, id
->function
));
107 EXPORT_SYMBOL(acpi_get_pci_id
);
109 int acpi_pci_bind(struct acpi_device
*device
)
112 acpi_status status
= AE_OK
;
113 struct acpi_pci_data
*data
= NULL
;
114 struct acpi_pci_data
*pdata
= NULL
;
115 char *pathname
= NULL
;
116 struct acpi_buffer buffer
= { 0, NULL
};
117 acpi_handle handle
= NULL
;
122 if (!device
|| !device
->parent
)
125 pathname
= kzalloc(ACPI_PATHNAME_MAX
, GFP_KERNEL
);
128 buffer
.length
= ACPI_PATHNAME_MAX
;
129 buffer
.pointer
= pathname
;
131 data
= kzalloc(sizeof(struct acpi_pci_data
), GFP_KERNEL
);
137 acpi_get_name(device
->handle
, ACPI_FULL_PATHNAME
, &buffer
);
138 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Binding PCI device [%s]...\n",
144 * These are obtained via the parent device's ACPI-PCI context.
146 status
= acpi_get_data(device
->parent
->handle
, acpi_pci_data_handler
,
148 if (ACPI_FAILURE(status
) || !pdata
|| !pdata
->bus
) {
149 ACPI_EXCEPTION((AE_INFO
, status
,
150 "Invalid ACPI-PCI context for parent device %s",
151 acpi_device_bid(device
->parent
)));
155 data
->id
.segment
= pdata
->id
.segment
;
156 data
->id
.bus
= pdata
->bus
->number
;
161 * These are simply obtained from the device's _ADR method. Note
162 * that a value of zero is valid.
164 data
->id
.device
= device
->pnp
.bus_address
>> 16;
165 data
->id
.function
= device
->pnp
.bus_address
& 0xFFFF;
167 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "...to %02x:%02x:%02x.%02x\n",
168 data
->id
.segment
, data
->id
.bus
, data
->id
.device
,
172 * TBD: Support slot devices (e.g. function=0xFFFF).
178 * Locate matching device in PCI namespace. If it doesn't exist
179 * this typically means that the device isn't currently inserted
180 * (e.g. docking station, port replicator, etc.).
181 * We cannot simply search the global pci device list, since
182 * PCI devices are added to the global pci list when the root
183 * bridge start ops are run, which may not have happened yet.
185 bus
= pci_find_bus(data
->id
.segment
, data
->id
.bus
);
187 list_for_each_entry(dev
, &bus
->devices
, bus_list
) {
188 if (dev
->devfn
== PCI_DEVFN(data
->id
.device
,
189 data
->id
.function
)) {
196 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
197 "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
198 data
->id
.segment
, data
->id
.bus
,
199 data
->id
.device
, data
->id
.function
));
203 if (!data
->dev
->bus
) {
204 printk(KERN_ERR PREFIX
205 "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
206 data
->id
.segment
, data
->id
.bus
,
207 data
->id
.device
, data
->id
.function
);
215 * If so, set the 'bus' field and install the 'bind' function to
216 * facilitate callbacks for all of its children.
218 if (data
->dev
->subordinate
) {
219 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
220 "Device %02x:%02x:%02x.%02x is a PCI bridge\n",
221 data
->id
.segment
, data
->id
.bus
,
222 data
->id
.device
, data
->id
.function
));
223 data
->bus
= data
->dev
->subordinate
;
224 device
->ops
.bind
= acpi_pci_bind
;
225 device
->ops
.unbind
= acpi_pci_unbind
;
229 * Attach ACPI-PCI Context
230 * -----------------------
231 * Thus binding the ACPI and PCI devices.
233 status
= acpi_attach_data(device
->handle
, acpi_pci_data_handler
, data
);
234 if (ACPI_FAILURE(status
)) {
235 ACPI_EXCEPTION((AE_INFO
, status
,
236 "Unable to attach ACPI-PCI context to device %s",
237 acpi_device_bid(device
)));
245 * Evaluate and parse _PRT, if exists. This code is independent of
246 * PCI bridges (above) to allow parsing of _PRT objects within the
247 * scope of non-bridge devices. Note that _PRTs within the scope of
248 * a PCI bridge assume the bridge's subordinate bus number.
250 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
252 status
= acpi_get_handle(device
->handle
, METHOD_NAME__PRT
, &handle
);
253 if (ACPI_SUCCESS(status
)) {
254 if (data
->bus
) /* PCI-PCI bridge */
255 acpi_pci_irq_add_prt(device
->handle
, data
->id
.segment
,
257 else /* non-bridge PCI device */
258 acpi_pci_irq_add_prt(device
->handle
, data
->id
.segment
,
270 int acpi_pci_unbind(struct acpi_device
*device
)
273 acpi_status status
= AE_OK
;
274 struct acpi_pci_data
*data
= NULL
;
275 char *pathname
= NULL
;
276 struct acpi_buffer buffer
= { 0, NULL
};
279 if (!device
|| !device
->parent
)
282 pathname
= kzalloc(ACPI_PATHNAME_MAX
, GFP_KERNEL
);
286 buffer
.length
= ACPI_PATHNAME_MAX
;
287 buffer
.pointer
= pathname
;
288 acpi_get_name(device
->handle
, ACPI_FULL_PATHNAME
, &buffer
);
289 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Unbinding PCI device [%s]...\n",
294 acpi_get_data(device
->handle
, acpi_pci_data_handler
,
296 if (ACPI_FAILURE(status
)) {
301 status
= acpi_detach_data(device
->handle
, acpi_pci_data_handler
);
302 if (ACPI_FAILURE(status
)) {
303 ACPI_EXCEPTION((AE_INFO
, status
,
304 "Unable to detach data from device %s",
305 acpi_device_bid(device
)));
309 if (data
->dev
->subordinate
) {
310 acpi_pci_irq_del_prt(data
->id
.segment
, data
->bus
->number
);
319 acpi_pci_bind_root(struct acpi_device
*device
,
320 struct acpi_pci_id
*id
, struct pci_bus
*bus
)
323 acpi_status status
= AE_OK
;
324 struct acpi_pci_data
*data
= NULL
;
325 char *pathname
= NULL
;
326 struct acpi_buffer buffer
= { 0, NULL
};
328 pathname
= kzalloc(ACPI_PATHNAME_MAX
, GFP_KERNEL
);
332 buffer
.length
= ACPI_PATHNAME_MAX
;
333 buffer
.pointer
= pathname
;
335 if (!device
|| !id
|| !bus
) {
340 data
= kzalloc(sizeof(struct acpi_pci_data
), GFP_KERNEL
);
348 device
->ops
.bind
= acpi_pci_bind
;
349 device
->ops
.unbind
= acpi_pci_unbind
;
351 acpi_get_name(device
->handle
, ACPI_FULL_PATHNAME
, &buffer
);
353 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Binding PCI root bridge [%s] to "
354 "%02x:%02x\n", pathname
, id
->segment
, id
->bus
));
356 status
= acpi_attach_data(device
->handle
, acpi_pci_data_handler
, data
);
357 if (ACPI_FAILURE(status
)) {
358 ACPI_EXCEPTION((AE_INFO
, status
,
359 "Unable to attach ACPI-PCI context to device %s",
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