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 | ||
83e42bcd | 85 | if (!dev->irq && dev->pin) { |
34a2e15e | 86 | dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; " |
34438ba6 | 87 | "check vendor BIOS\n", dev->vendor, dev->device); |
1da177e4 | 88 | } |
f118c0c3 RW |
89 | status = pcie_port_device_register(dev); |
90 | if (status) | |
91 | return status; | |
1da177e4 | 92 | |
4bf3392e ZY |
93 | pcie_portdrv_save_config(dev); |
94 | ||
1da177e4 LT |
95 | return 0; |
96 | } | |
97 | ||
98 | static void pcie_portdrv_remove (struct pci_dev *dev) | |
99 | { | |
100 | pcie_port_device_remove(dev); | |
d8998719 | 101 | pci_disable_device(dev); |
5823d100 | 102 | kfree(pci_get_drvdata(dev)); |
1da177e4 LT |
103 | } |
104 | ||
4bf3392e | 105 | static int error_detected_iter(struct device *device, void *data) |
60854838 | 106 | { |
4bf3392e ZY |
107 | struct pcie_device *pcie_device; |
108 | struct pcie_port_service_driver *driver; | |
109 | struct aer_broadcast_data *result_data; | |
110 | pci_ers_result_t status; | |
111 | ||
112 | result_data = (struct aer_broadcast_data *) data; | |
113 | ||
114 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
115 | driver = to_service_driver(device->driver); | |
116 | if (!driver || | |
117 | !driver->err_handler || | |
118 | !driver->err_handler->error_detected) | |
119 | return 0; | |
120 | ||
121 | pcie_device = to_pcie_device(device); | |
122 | ||
123 | /* Forward error detected message to service drivers */ | |
124 | status = driver->err_handler->error_detected( | |
125 | pcie_device->port, | |
126 | result_data->state); | |
127 | result_data->result = | |
128 | merge_result(result_data->result, status); | |
129 | } | |
130 | ||
131 | return 0; | |
60854838 HK |
132 | } |
133 | ||
4bf3392e ZY |
134 | static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, |
135 | enum pci_channel_state error) | |
60854838 | 136 | { |
4bf3392e ZY |
137 | struct aer_broadcast_data result_data = |
138 | {error, PCI_ERS_RESULT_CAN_RECOVER}; | |
b19441af | 139 | int retval; |
4bf3392e | 140 | |
b19441af GKH |
141 | /* can not fail */ |
142 | retval = device_for_each_child(&dev->dev, &result_data, error_detected_iter); | |
4bf3392e ZY |
143 | |
144 | return result_data.result; | |
145 | } | |
146 | ||
147 | static int mmio_enabled_iter(struct device *device, void *data) | |
148 | { | |
149 | struct pcie_device *pcie_device; | |
150 | struct pcie_port_service_driver *driver; | |
151 | pci_ers_result_t status, *result; | |
152 | ||
153 | result = (pci_ers_result_t *) data; | |
154 | ||
155 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
156 | driver = to_service_driver(device->driver); | |
157 | if (driver && | |
158 | driver->err_handler && | |
159 | driver->err_handler->mmio_enabled) { | |
160 | pcie_device = to_pcie_device(device); | |
161 | ||
162 | /* Forward error message to service drivers */ | |
163 | status = driver->err_handler->mmio_enabled( | |
164 | pcie_device->port); | |
165 | *result = merge_result(*result, status); | |
166 | } | |
167 | } | |
60854838 | 168 | |
60854838 HK |
169 | return 0; |
170 | } | |
171 | ||
4bf3392e | 172 | static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) |
1da177e4 | 173 | { |
4bf3392e | 174 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; |
b19441af | 175 | int retval; |
5823d100 | 176 | |
b19441af GKH |
177 | /* get true return value from &status */ |
178 | retval = device_for_each_child(&dev->dev, &status, mmio_enabled_iter); | |
4bf3392e | 179 | return status; |
1da177e4 LT |
180 | } |
181 | ||
4bf3392e | 182 | static int slot_reset_iter(struct device *device, void *data) |
1da177e4 | 183 | { |
4bf3392e ZY |
184 | struct pcie_device *pcie_device; |
185 | struct pcie_port_service_driver *driver; | |
186 | pci_ers_result_t status, *result; | |
187 | ||
188 | result = (pci_ers_result_t *) data; | |
189 | ||
190 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
191 | driver = to_service_driver(device->driver); | |
192 | if (driver && | |
193 | driver->err_handler && | |
194 | driver->err_handler->slot_reset) { | |
195 | pcie_device = to_pcie_device(device); | |
196 | ||
197 | /* Forward error message to service drivers */ | |
198 | status = driver->err_handler->slot_reset( | |
199 | pcie_device->port); | |
200 | *result = merge_result(*result, status); | |
201 | } | |
202 | } | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) | |
208 | { | |
bf164410 | 209 | pci_ers_result_t status = PCI_ERS_RESULT_NONE; |
b19441af | 210 | int retval; |
4bf3392e ZY |
211 | |
212 | /* If fatal, restore cfg space for possible link reset at upstream */ | |
213 | if (dev->error_state == pci_channel_io_frozen) { | |
a79d682f | 214 | pci_restore_state(dev); |
4bf3392e ZY |
215 | pcie_portdrv_restore_config(dev); |
216 | pci_enable_pcie_error_reporting(dev); | |
217 | } | |
218 | ||
b19441af GKH |
219 | /* get true return value from &status */ |
220 | retval = device_for_each_child(&dev->dev, &status, slot_reset_iter); | |
4bf3392e ZY |
221 | |
222 | return status; | |
223 | } | |
224 | ||
225 | static int resume_iter(struct device *device, void *data) | |
226 | { | |
227 | struct pcie_device *pcie_device; | |
228 | struct pcie_port_service_driver *driver; | |
229 | ||
230 | if (device->bus == &pcie_port_bus_type && device->driver) { | |
231 | driver = to_service_driver(device->driver); | |
232 | if (driver && | |
233 | driver->err_handler && | |
234 | driver->err_handler->resume) { | |
235 | pcie_device = to_pcie_device(device); | |
236 | ||
237 | /* Forward error message to service drivers */ | |
238 | driver->err_handler->resume(pcie_device->port); | |
239 | } | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static void pcie_portdrv_err_resume(struct pci_dev *dev) | |
246 | { | |
b19441af GKH |
247 | int retval; |
248 | /* nothing to do with error value, if it ever happens */ | |
249 | retval = device_for_each_child(&dev->dev, NULL, resume_iter); | |
1da177e4 | 250 | } |
1da177e4 LT |
251 | |
252 | /* | |
253 | * LINUX Device Driver Model | |
254 | */ | |
255 | static const struct pci_device_id port_pci_ids[] = { { | |
256 | /* handle any PCI-Express port */ | |
257 | PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0), | |
258 | }, { /* end: all zeroes */ } | |
259 | }; | |
260 | MODULE_DEVICE_TABLE(pci, port_pci_ids); | |
261 | ||
4bf3392e ZY |
262 | static struct pci_error_handlers pcie_portdrv_err_handler = { |
263 | .error_detected = pcie_portdrv_error_detected, | |
264 | .mmio_enabled = pcie_portdrv_mmio_enabled, | |
265 | .slot_reset = pcie_portdrv_slot_reset, | |
266 | .resume = pcie_portdrv_err_resume, | |
267 | }; | |
268 | ||
3603a6a3 | 269 | static struct pci_driver pcie_portdriver = { |
1da177e4 LT |
270 | .name = (char *)device_name, |
271 | .id_table = &port_pci_ids[0], | |
272 | ||
273 | .probe = pcie_portdrv_probe, | |
274 | .remove = pcie_portdrv_remove, | |
275 | ||
a79d682f | 276 | .suspend = pcie_portdrv_suspend, |
a79d682f | 277 | .resume = pcie_portdrv_resume, |
4bf3392e ZY |
278 | |
279 | .err_handler = &pcie_portdrv_err_handler, | |
1da177e4 LT |
280 | }; |
281 | ||
282 | static int __init pcie_portdrv_init(void) | |
283 | { | |
20d51660 | 284 | int retval; |
1da177e4 | 285 | |
20d51660 RD |
286 | retval = pcie_port_bus_register(); |
287 | if (retval) { | |
288 | printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval); | |
289 | goto out; | |
290 | } | |
3603a6a3 | 291 | retval = pci_register_driver(&pcie_portdriver); |
1da177e4 LT |
292 | if (retval) |
293 | pcie_port_bus_unregister(); | |
20d51660 | 294 | out: |
1da177e4 LT |
295 | return retval; |
296 | } | |
297 | ||
298 | static void __exit pcie_portdrv_exit(void) | |
299 | { | |
3603a6a3 | 300 | pci_unregister_driver(&pcie_portdriver); |
1da177e4 LT |
301 | pcie_port_bus_unregister(); |
302 | } | |
303 | ||
304 | module_init(pcie_portdrv_init); | |
305 | module_exit(pcie_portdrv_exit); |