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path: root/drivers/acpi/pci_bind.c
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Diffstat (limited to 'drivers/acpi/pci_bind.c')
-rw-r--r--drivers/acpi/pci_bind.c313
1 files changed, 37 insertions, 276 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index bc46de3d967f..a5a77b78a723 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -24,12 +24,7 @@
24 */ 24 */
25 25
26#include <linux/kernel.h> 26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/types.h> 27#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> 28#include <linux/pci.h>
34#include <linux/acpi.h> 29#include <linux/acpi.h>
35#include <acpi/acpi_bus.h> 30#include <acpi/acpi_bus.h>
@@ -38,310 +33,76 @@
38#define _COMPONENT ACPI_PCI_COMPONENT 33#define _COMPONENT ACPI_PCI_COMPONENT
39ACPI_MODULE_NAME("pci_bind"); 34ACPI_MODULE_NAME("pci_bind");
40 35
41struct acpi_pci_data { 36static int acpi_pci_unbind(struct acpi_device *device)
42 struct acpi_pci_id id;
43 struct pci_bus *bus;
44 struct pci_dev *dev;
45};
46
47static int acpi_pci_unbind(struct acpi_device *device);
48
49static void acpi_pci_data_handler(acpi_handle handle, u32 function,
50 void *context)
51{
52
53 /* TBD: Anything we need to do here? */
54
55 return;
56}
57
58/**
59 * acpi_get_pci_id
60 * ------------------
61 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
62 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
63 * This typically occurs when resolving PCI operation region information.
64 */
65acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
66{ 37{
67 int result = 0; 38 struct pci_dev *dev;
68 acpi_status status = AE_OK;
69 struct acpi_device *device = NULL;
70 struct acpi_pci_data *data = NULL;
71
72
73 if (!id)
74 return AE_BAD_PARAMETER;
75
76 result = acpi_bus_get_device(handle, &device);
77 if (result) {
78 printk(KERN_ERR PREFIX
79 "Invalid ACPI Bus context for device %s\n",
80 acpi_device_bid(device));
81 return AE_NOT_EXIST;
82 }
83
84 status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
85 if (ACPI_FAILURE(status) || !data) {
86 ACPI_EXCEPTION((AE_INFO, status,
87 "Invalid ACPI-PCI context for device %s",
88 acpi_device_bid(device)));
89 return status;
90 }
91 39
92 *id = data->id; 40 dev = acpi_get_pci_dev(device->handle);
41 if (!dev || !dev->subordinate)
42 goto out;
93 43
94 /* 44 acpi_pci_irq_del_prt(dev->subordinate);
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 45
101 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 46 device->ops.bind = NULL;
102 "Device %s has PCI address %04x:%02x:%02x.%d\n", 47 device->ops.unbind = NULL;
103 acpi_device_bid(device), id->segment, id->bus,
104 id->device, id->function));
105 48
106 return AE_OK; 49out:
50 pci_dev_put(dev);
51 return 0;
107} 52}
108 53
109EXPORT_SYMBOL(acpi_get_pci_id); 54static int acpi_pci_bind(struct acpi_device *device)
110
111int acpi_pci_bind(struct acpi_device *device)
112{ 55{
113 int result = 0;
114 acpi_status status; 56 acpi_status status;
115 struct acpi_pci_data *data;
116 struct acpi_pci_data *pdata;
117 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
118 acpi_handle handle; 57 acpi_handle handle;
58 struct pci_bus *bus;
59 struct pci_dev *dev;
119 60
120 if (!device || !device->parent) 61 dev = acpi_get_pci_dev(device->handle);
121 return -EINVAL; 62 if (!dev)
122 63 return 0;
123 data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
124 if (!data)
125 return -ENOMEM;
126
127 status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
128 if (ACPI_FAILURE(status)) {
129 kfree(data);
130 return -ENODEV;
131 }
132
133 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
134 (char *)buffer.pointer));
135
136 /*
137 * Segment & Bus
138 * -------------
139 * These are obtained via the parent device's ACPI-PCI context.
140 */
141 status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
142 (void **)&pdata);
143 if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
144 ACPI_EXCEPTION((AE_INFO, status,
145 "Invalid ACPI-PCI context for parent device %s",
146 acpi_device_bid(device->parent)));
147 result = -ENODEV;
148 goto end;
149 }
150 data->id.segment = pdata->id.segment;
151 data->id.bus = pdata->bus->number;
152
153 /*
154 * Device & Function
155 * -----------------
156 * These are simply obtained from the device's _ADR method. Note
157 * that a value of zero is valid.
158 */
159 data->id.device = device->pnp.bus_address >> 16;
160 data->id.function = device->pnp.bus_address & 0xFFFF;
161
162 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n",
163 data->id.segment, data->id.bus, data->id.device,
164 data->id.function));
165
166 /*
167 * TBD: Support slot devices (e.g. function=0xFFFF).
168 */
169
170 /*
171 * Locate PCI Device
172 * -----------------
173 * Locate matching device in PCI namespace. If it doesn't exist
174 * this typically means that the device isn't currently inserted
175 * (e.g. docking station, port replicator, etc.).
176 */
177 data->dev = pci_get_slot(pdata->bus,
178 PCI_DEVFN(data->id.device, data->id.function));
179 if (!data->dev) {
180 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
181 "Device %04x:%02x:%02x.%d not present in PCI namespace\n",
182 data->id.segment, data->id.bus,
183 data->id.device, data->id.function));
184 result = -ENODEV;
185 goto end;
186 }
187 if (!data->dev->bus) {
188 printk(KERN_ERR PREFIX
189 "Device %04x:%02x:%02x.%d has invalid 'bus' field\n",
190 data->id.segment, data->id.bus,
191 data->id.device, data->id.function);
192 result = -ENODEV;
193 goto end;
194 }
195 64
196 /* 65 /*
197 * PCI Bridge? 66 * Install the 'bind' function to facilitate callbacks for
198 * ----------- 67 * children of the P2P bridge.
199 * If so, set the 'bus' field and install the 'bind' function to
200 * facilitate callbacks for all of its children.
201 */ 68 */
202 if (data->dev->subordinate) { 69 if (dev->subordinate) {
203 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 70 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
204 "Device %04x:%02x:%02x.%d is a PCI bridge\n", 71 "Device %04x:%02x:%02x.%d is a PCI bridge\n",
205 data->id.segment, data->id.bus, 72 pci_domain_nr(dev->bus), dev->bus->number,
206 data->id.device, data->id.function)); 73 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
207 data->bus = data->dev->subordinate;
208 device->ops.bind = acpi_pci_bind; 74 device->ops.bind = acpi_pci_bind;
209 device->ops.unbind = acpi_pci_unbind; 75 device->ops.unbind = acpi_pci_unbind;
210 } 76 }
211 77
212 /* 78 /*
213 * Attach ACPI-PCI Context 79 * Evaluate and parse _PRT, if exists. This code allows parsing of
214 * ----------------------- 80 * _PRT objects within the scope of non-bridge devices. Note that
215 * Thus binding the ACPI and PCI devices. 81 * _PRTs within the scope of a PCI bridge assume the bridge's
216 */ 82 * subordinate bus number.
217 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
218 if (ACPI_FAILURE(status)) {
219 ACPI_EXCEPTION((AE_INFO, status,
220 "Unable to attach ACPI-PCI context to device %s",
221 acpi_device_bid(device)));
222 result = -ENODEV;
223 goto end;
224 }
225
226 /*
227 * PCI Routing Table
228 * -----------------
229 * Evaluate and parse _PRT, if exists. This code is independent of
230 * PCI bridges (above) to allow parsing of _PRT objects within the
231 * scope of non-bridge devices. Note that _PRTs within the scope of
232 * a PCI bridge assume the bridge's subordinate bus number.
233 * 83 *
234 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices? 84 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
235 */ 85 */
236 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); 86 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
237 if (ACPI_SUCCESS(status)) {
238 if (data->bus) /* PCI-PCI bridge */
239 acpi_pci_irq_add_prt(device->handle, data->id.segment,
240 data->bus->number);
241 else /* non-bridge PCI device */
242 acpi_pci_irq_add_prt(device->handle, data->id.segment,
243 data->id.bus);
244 }
245
246 end:
247 kfree(buffer.pointer);
248 if (result) {
249 pci_dev_put(data->dev);
250 kfree(data);
251 }
252 return result;
253}
254
255static int acpi_pci_unbind(struct acpi_device *device)
256{
257 int result = 0;
258 acpi_status status;
259 struct acpi_pci_data *data;
260 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
261
262
263 if (!device || !device->parent)
264 return -EINVAL;
265
266 status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
267 if (ACPI_FAILURE(status)) 87 if (ACPI_FAILURE(status))
268 return -ENODEV; 88 goto out;
269 89
270 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", 90 if (dev->subordinate)
271 (char *) buffer.pointer)); 91 bus = dev->subordinate;
272 kfree(buffer.pointer); 92 else
93 bus = dev->bus;
273 94
274 status = 95 acpi_pci_irq_add_prt(device->handle, bus);
275 acpi_get_data(device->handle, acpi_pci_data_handler,
276 (void **)&data);
277 if (ACPI_FAILURE(status)) {
278 result = -ENODEV;
279 goto end;
280 }
281 96
282 status = acpi_detach_data(device->handle, acpi_pci_data_handler); 97out:
283 if (ACPI_FAILURE(status)) { 98 pci_dev_put(dev);
284 ACPI_EXCEPTION((AE_INFO, status, 99 return 0;
285 "Unable to detach data from device %s",
286 acpi_device_bid(device)));
287 result = -ENODEV;
288 goto end;
289 }
290 if (data->dev->subordinate) {
291 acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
292 }
293 pci_dev_put(data->dev);
294 kfree(data);
295
296 end:
297 return result;
298} 100}
299 101
300int 102int acpi_pci_bind_root(struct acpi_device *device)
301acpi_pci_bind_root(struct acpi_device *device,
302 struct acpi_pci_id *id, struct pci_bus *bus)
303{ 103{
304 int result = 0;
305 acpi_status status;
306 struct acpi_pci_data *data = NULL;
307 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
308
309 if (!device || !id || !bus) {
310 return -EINVAL;
311 }
312
313 data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
314 if (!data)
315 return -ENOMEM;
316
317 data->id = *id;
318 data->bus = bus;
319 device->ops.bind = acpi_pci_bind; 104 device->ops.bind = acpi_pci_bind;
320 device->ops.unbind = acpi_pci_unbind; 105 device->ops.unbind = acpi_pci_unbind;
321 106
322 status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); 107 return 0;
323 if (ACPI_FAILURE(status)) {
324 kfree (data);
325 return -ENODEV;
326 }
327
328 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
329 "%04x:%02x\n", (char *)buffer.pointer,
330 id->segment, id->bus));
331
332 status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
333 if (ACPI_FAILURE(status)) {
334 ACPI_EXCEPTION((AE_INFO, status,
335 "Unable to attach ACPI-PCI context to device %s",
336 (char *)buffer.pointer));
337 result = -ENODEV;
338 goto end;
339 }
340
341 end:
342 kfree(buffer.pointer);
343 if (result != 0)
344 kfree(data);
345
346 return result;
347} 108}
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