Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * File: portdrv_pci.c | |
3 | * Purpose: PCI Express Port Bus Driver | |
4 | * | |
5 | * Copyright (C) 2004 Intel | |
6 | * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/pci.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/pm.h> | |
14 | #include <linux/init.h> | |
4e57b681 | 15 | #include <linux/slab.h> |
1da177e4 | 16 | #include <linux/pcieport_if.h> |
4bf3392e | 17 | #include <linux/aer.h> |
1da177e4 LT |
18 | |
19 | #include "portdrv.h" | |
4bf3392e | 20 | #include "aer/aerdrv.h" |
1da177e4 LT |
21 | |
22 | /* | |
23 | * Version Information | |
24 | */ | |
25 | #define DRIVER_VERSION "v1.0" | |
26 | #define DRIVER_AUTHOR "tom.l.nguyen@intel.com" | |
27 | #define DRIVER_DESC "PCIE Port Bus Driver" | |
28 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
29 | MODULE_DESCRIPTION(DRIVER_DESC); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | /* global data */ | |
33 | static const char device_name[] = "pcieport-driver"; | |
34 | ||
4bf3392e ZY |
35 | static int pcie_portdrv_save_config(struct pci_dev *dev) |
36 | { | |
37 | return pci_save_state(dev); | |
38 | } | |
39 | ||
4bf3392e ZY |
40 | static int pcie_portdrv_restore_config(struct pci_dev *dev) |
41 | { | |
42 | int retval; | |
43 | ||
4bf3392e ZY |
44 | retval = pci_enable_device(dev); |
45 | if (retval) | |
46 | return retval; | |
47 | pci_set_master(dev); | |
48 | return 0; | |
49 | } | |
50 | ||
0bed208e | 51 | #ifdef CONFIG_PM |
a79d682f | 52 | static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state) |
4bf3392e | 53 | { |
a79d682f | 54 | return pcie_port_device_suspend(dev, state); |
4bf3392e | 55 | |
a79d682f RW |
56 | } |
57 | ||
a79d682f | 58 | static int pcie_portdrv_resume(struct pci_dev *dev) |
4bf3392e | 59 | { |
27be54a6 | 60 | pci_set_master(dev); |
4bf3392e ZY |
61 | return pcie_port_device_resume(dev); |
62 | } | |
63 | #else | |
a79d682f | 64 | #define pcie_portdrv_suspend NULL |
a79d682f | 65 | #define pcie_portdrv_resume NULL |
4bf3392e ZY |
66 | #endif |
67 | ||
1da177e4 LT |
68 | /* |
69 | * pcie_portdrv_probe - Probe PCI-Express port devices | |
70 | * @dev: PCI-Express port device being probed | |
71 | * | |
72 | * If detected invokes the pcie_port_device_register() method for | |
73 | * this port device. | |
74 | * | |
75 | */ | |
76 | static int __devinit pcie_portdrv_probe (struct pci_dev *dev, | |
77 | const struct pci_device_id *id ) | |
78 | { | |
79 | int status; | |
80 | ||
81 | status = pcie_port_device_probe(dev); | |
82 | if (status) | |
83 | return status; | |
84 | ||
85 | if (pci_enable_device(dev) < 0) | |
86 | return -ENODEV; | |
87 | ||
88 | pci_set_master(dev); | |
83e42bcd | 89 | if (!dev->irq && dev->pin) { |
34a2e15e | 90 | dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; " |
34438ba6 | 91 | "check vendor BIOS\n", dev->vendor, dev->device); |
1da177e4 | 92 | } |
e4fd1f4a RD |
93 | if (pcie_port_device_register(dev)) { |
94 | pci_disable_device(dev); | |
1da177e4 | 95 | return -ENOMEM; |
e4fd1f4a | 96 | } |
1da177e4 | 97 | |
4bf3392e ZY |
98 | pcie_portdrv_save_config(dev); |
99 | ||
1da177e4 LT |
100 | return 0; |
101 | } | |
102 | ||
103 | static void pcie_portdrv_remove (struct pci_dev *dev) | |
104 | { | |
105 | pcie_port_device_remove(dev); | |
d8998719 | 106 | pci_disable_device(dev); |
5823d100 | 107 | kfree(pci_get_drvdata(dev)); |
1da177e4 LT |
108 | } |
109 | ||
4bf3392e | 110 | static int error_detected_iter(struct device *device, void *data) |
60854838 | 111 | { |
4bf3392e ZY |
112 | struct pcie_device *pcie_device; |
113 | struct pcie_port_service_driver *driver; | |
114 | struct aer_broadcast_data *result_data; | |
115 | pci_ers_result_t status; | |
116 | ||
117 | result_data = (struct aer_broadcast_data *) data; | |
118 | ||
119 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
120 | driver = to_service_driver(device->driver); | |
121 | if (!driver || | |
122 | !driver->err_handler || | |
123 | !driver->err_handler->error_detected) | |
124 | return 0; | |
125 | ||
126 | pcie_device = to_pcie_device(device); | |
127 | ||
128 | /* Forward error detected message to service drivers */ | |
129 | status = driver->err_handler->error_detected( | |
130 | pcie_device->port, | |
131 | result_data->state); | |
132 | result_data->result = | |
133 | merge_result(result_data->result, status); | |
134 | } | |
135 | ||
136 | return 0; | |
60854838 HK |
137 | } |
138 | ||
4bf3392e ZY |
139 | static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, |
140 | enum pci_channel_state error) | |
60854838 | 141 | { |
4bf3392e ZY |
142 | struct aer_broadcast_data result_data = |
143 | {error, PCI_ERS_RESULT_CAN_RECOVER}; | |
b19441af | 144 | int retval; |
4bf3392e | 145 | |
b19441af GKH |
146 | /* can not fail */ |
147 | retval = device_for_each_child(&dev->dev, &result_data, error_detected_iter); | |
4bf3392e ZY |
148 | |
149 | return result_data.result; | |
150 | } | |
151 | ||
152 | static int mmio_enabled_iter(struct device *device, void *data) | |
153 | { | |
154 | struct pcie_device *pcie_device; | |
155 | struct pcie_port_service_driver *driver; | |
156 | pci_ers_result_t status, *result; | |
157 | ||
158 | result = (pci_ers_result_t *) data; | |
159 | ||
160 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
161 | driver = to_service_driver(device->driver); | |
162 | if (driver && | |
163 | driver->err_handler && | |
164 | driver->err_handler->mmio_enabled) { | |
165 | pcie_device = to_pcie_device(device); | |
166 | ||
167 | /* Forward error message to service drivers */ | |
168 | status = driver->err_handler->mmio_enabled( | |
169 | pcie_device->port); | |
170 | *result = merge_result(*result, status); | |
171 | } | |
172 | } | |
60854838 | 173 | |
60854838 HK |
174 | return 0; |
175 | } | |
176 | ||
4bf3392e | 177 | static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) |
1da177e4 | 178 | { |
4bf3392e | 179 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; |
b19441af | 180 | int retval; |
5823d100 | 181 | |
b19441af GKH |
182 | /* get true return value from &status */ |
183 | retval = device_for_each_child(&dev->dev, &status, mmio_enabled_iter); | |
4bf3392e | 184 | return status; |
1da177e4 LT |
185 | } |
186 | ||
4bf3392e | 187 | static int slot_reset_iter(struct device *device, void *data) |
1da177e4 | 188 | { |
4bf3392e ZY |
189 | struct pcie_device *pcie_device; |
190 | struct pcie_port_service_driver *driver; | |
191 | pci_ers_result_t status, *result; | |
192 | ||
193 | result = (pci_ers_result_t *) data; | |
194 | ||
195 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
196 | driver = to_service_driver(device->driver); | |
197 | if (driver && | |
198 | driver->err_handler && | |
199 | driver->err_handler->slot_reset) { | |
200 | pcie_device = to_pcie_device(device); | |
201 | ||
202 | /* Forward error message to service drivers */ | |
203 | status = driver->err_handler->slot_reset( | |
204 | pcie_device->port); | |
205 | *result = merge_result(*result, status); | |
206 | } | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) | |
213 | { | |
bf164410 | 214 | pci_ers_result_t status = PCI_ERS_RESULT_NONE; |
b19441af | 215 | int retval; |
4bf3392e ZY |
216 | |
217 | /* If fatal, restore cfg space for possible link reset at upstream */ | |
218 | if (dev->error_state == pci_channel_io_frozen) { | |
a79d682f | 219 | pci_restore_state(dev); |
4bf3392e ZY |
220 | pcie_portdrv_restore_config(dev); |
221 | pci_enable_pcie_error_reporting(dev); | |
222 | } | |
223 | ||
b19441af GKH |
224 | /* get true return value from &status */ |
225 | retval = device_for_each_child(&dev->dev, &status, slot_reset_iter); | |
4bf3392e ZY |
226 | |
227 | return status; | |
228 | } | |
229 | ||
230 | static int resume_iter(struct device *device, void *data) | |
231 | { | |
232 | struct pcie_device *pcie_device; | |
233 | struct pcie_port_service_driver *driver; | |
234 | ||
235 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
236 | driver = to_service_driver(device->driver); | |
237 | if (driver && | |
238 | driver->err_handler && | |
239 | driver->err_handler->resume) { | |
240 | pcie_device = to_pcie_device(device); | |
241 | ||
242 | /* Forward error message to service drivers */ | |
243 | driver->err_handler->resume(pcie_device->port); | |
244 | } | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | static void pcie_portdrv_err_resume(struct pci_dev *dev) | |
251 | { | |
b19441af GKH |
252 | int retval; |
253 | /* nothing to do with error value, if it ever happens */ | |
254 | retval = device_for_each_child(&dev->dev, NULL, resume_iter); | |
1da177e4 | 255 | } |
1da177e4 LT |
256 | |
257 | /* | |
258 | * LINUX Device Driver Model | |
259 | */ | |
260 | static const struct pci_device_id port_pci_ids[] = { { | |
261 | /* handle any PCI-Express port */ | |
262 | PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0), | |
263 | }, { /* end: all zeroes */ } | |
264 | }; | |
265 | MODULE_DEVICE_TABLE(pci, port_pci_ids); | |
266 | ||
4bf3392e ZY |
267 | static struct pci_error_handlers pcie_portdrv_err_handler = { |
268 | .error_detected = pcie_portdrv_error_detected, | |
269 | .mmio_enabled = pcie_portdrv_mmio_enabled, | |
270 | .slot_reset = pcie_portdrv_slot_reset, | |
271 | .resume = pcie_portdrv_err_resume, | |
272 | }; | |
273 | ||
3603a6a3 | 274 | static struct pci_driver pcie_portdriver = { |
1da177e4 LT |
275 | .name = (char *)device_name, |
276 | .id_table = &port_pci_ids[0], | |
277 | ||
278 | .probe = pcie_portdrv_probe, | |
279 | .remove = pcie_portdrv_remove, | |
280 | ||
a79d682f | 281 | .suspend = pcie_portdrv_suspend, |
a79d682f | 282 | .resume = pcie_portdrv_resume, |
4bf3392e ZY |
283 | |
284 | .err_handler = &pcie_portdrv_err_handler, | |
1da177e4 LT |
285 | }; |
286 | ||
287 | static int __init pcie_portdrv_init(void) | |
288 | { | |
20d51660 | 289 | int retval; |
1da177e4 | 290 | |
20d51660 RD |
291 | retval = pcie_port_bus_register(); |
292 | if (retval) { | |
293 | printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval); | |
294 | goto out; | |
295 | } | |
3603a6a3 | 296 | retval = pci_register_driver(&pcie_portdriver); |
1da177e4 LT |
297 | if (retval) |
298 | pcie_port_bus_unregister(); | |
20d51660 | 299 | out: |
1da177e4 LT |
300 | return retval; |
301 | } | |
302 | ||
303 | static void __exit pcie_portdrv_exit(void) | |
304 | { | |
3603a6a3 | 305 | pci_unregister_driver(&pcie_portdriver); |
1da177e4 LT |
306 | pcie_port_bus_unregister(); |
307 | } | |
308 | ||
309 | module_init(pcie_portdrv_init); | |
310 | module_exit(pcie_portdrv_exit); |