Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Standard Hot Plug Controller Driver | |
3 | * | |
4 | * Copyright (C) 1995,2001 Compaq Computer Corporation | |
5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * Copyright (C) 2001 IBM Corp. | |
7 | * Copyright (C) 2003-2004 Intel Corporation | |
8 | * | |
9 | * All rights reserved. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
19 | * NON INFRINGEMENT. See the GNU General Public License for more | |
20 | * details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/types.h> | |
1da177e4 | 34 | #include <linux/pci.h> |
f7391f53 | 35 | #include <linux/workqueue.h> |
1da177e4 | 36 | #include "shpchp.h" |
1da177e4 LT |
37 | |
38 | /* Global variables */ | |
39 | int shpchp_debug; | |
40 | int shpchp_poll_mode; | |
41 | int shpchp_poll_time; | |
f7391f53 | 42 | struct workqueue_struct *shpchp_wq; |
1da177e4 LT |
43 | |
44 | #define DRIVER_VERSION "0.4" | |
45 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" | |
46 | #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" | |
47 | ||
48 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
49 | MODULE_DESCRIPTION(DRIVER_DESC); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | module_param(shpchp_debug, bool, 0644); | |
53 | module_param(shpchp_poll_mode, bool, 0644); | |
54 | module_param(shpchp_poll_time, int, 0644); | |
55 | MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); | |
56 | MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); | |
57 | MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); | |
58 | ||
59 | #define SHPC_MODULE_NAME "shpchp" | |
60 | ||
1da177e4 LT |
61 | static int set_attention_status (struct hotplug_slot *slot, u8 value); |
62 | static int enable_slot (struct hotplug_slot *slot); | |
63 | static int disable_slot (struct hotplug_slot *slot); | |
64 | static int get_power_status (struct hotplug_slot *slot, u8 *value); | |
65 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); | |
66 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); | |
67 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); | |
68 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
69 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
70 | ||
71 | static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { | |
1da177e4 LT |
72 | .set_attention_status = set_attention_status, |
73 | .enable_slot = enable_slot, | |
74 | .disable_slot = disable_slot, | |
75 | .get_power_status = get_power_status, | |
76 | .get_attention_status = get_attention_status, | |
77 | .get_latch_status = get_latch_status, | |
78 | .get_adapter_status = get_adapter_status, | |
79 | .get_max_bus_speed = get_max_bus_speed, | |
80 | .get_cur_bus_speed = get_cur_bus_speed, | |
81 | }; | |
82 | ||
83 | /** | |
84 | * release_slot - free up the memory used by a slot | |
85 | * @hotplug_slot: slot to free | |
86 | */ | |
87 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
88 | { | |
ee17fd93 | 89 | struct slot *slot = hotplug_slot->private; |
1da177e4 | 90 | |
be7bce25 | 91 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 92 | __func__, slot_name(slot)); |
1da177e4 LT |
93 | |
94 | kfree(slot->hotplug_slot->info); | |
1da177e4 LT |
95 | kfree(slot->hotplug_slot); |
96 | kfree(slot); | |
97 | } | |
98 | ||
99 | static int init_slots(struct controller *ctrl) | |
100 | { | |
926030f6 KK |
101 | struct slot *slot; |
102 | struct hotplug_slot *hotplug_slot; | |
103 | struct hotplug_slot_info *info; | |
66f17055 | 104 | char name[SLOT_NAME_SIZE]; |
926030f6 | 105 | int retval = -ENOMEM; |
5fe6cc60 | 106 | int i; |
926030f6 KK |
107 | |
108 | for (i = 0; i < ctrl->num_slots; i++) { | |
57c95c0d | 109 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
926030f6 | 110 | if (!slot) |
1da177e4 LT |
111 | goto error; |
112 | ||
57c95c0d | 113 | hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); |
926030f6 | 114 | if (!hotplug_slot) |
1da177e4 | 115 | goto error_slot; |
926030f6 | 116 | slot->hotplug_slot = hotplug_slot; |
1da177e4 | 117 | |
57c95c0d | 118 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
926030f6 | 119 | if (!info) |
1da177e4 | 120 | goto error_hpslot; |
926030f6 KK |
121 | hotplug_slot->info = info; |
122 | ||
926030f6 | 123 | slot->hp_slot = i; |
926030f6 | 124 | slot->ctrl = ctrl; |
227b84c7 | 125 | slot->bus = ctrl->pci_dev->subordinate->number; |
926030f6 KK |
126 | slot->device = ctrl->slot_device_offset + i; |
127 | slot->hpc_ops = ctrl->hpc_ops; | |
6f39be2e | 128 | slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); |
a246fa4e | 129 | mutex_init(&slot->lock); |
e325e1f0 | 130 | INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); |
1da177e4 LT |
131 | |
132 | /* register this slot with the hotplug pci core */ | |
926030f6 KK |
133 | hotplug_slot->private = slot; |
134 | hotplug_slot->release = &release_slot; | |
66f17055 | 135 | snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); |
926030f6 KK |
136 | hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
137 | ||
be7bce25 TI |
138 | ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x " |
139 | "hp_slot=%x sun=%x slot_device_offset=%x\n", | |
140 | pci_domain_nr(ctrl->pci_dev->subordinate), | |
141 | slot->bus, slot->device, slot->hp_slot, slot->number, | |
142 | ctrl->slot_device_offset); | |
f46753c5 | 143 | retval = pci_hp_register(slot->hotplug_slot, |
66f17055 | 144 | ctrl->pci_dev->subordinate, slot->device, name); |
926030f6 | 145 | if (retval) { |
f98ca311 TI |
146 | ctrl_err(ctrl, "pci_hp_register failed with error %d\n", |
147 | retval); | |
bbe779db | 148 | goto error_info; |
1da177e4 LT |
149 | } |
150 | ||
66f17055 AC |
151 | get_power_status(hotplug_slot, &info->power_status); |
152 | get_attention_status(hotplug_slot, &info->attention_status); | |
153 | get_latch_status(hotplug_slot, &info->latch_status); | |
154 | get_adapter_status(hotplug_slot, &info->adapter_status); | |
155 | ||
5b1a960d | 156 | list_add(&slot->slot_list, &ctrl->slot_list); |
1da177e4 LT |
157 | } |
158 | ||
159 | return 0; | |
1da177e4 | 160 | error_info: |
926030f6 | 161 | kfree(info); |
1da177e4 | 162 | error_hpslot: |
926030f6 | 163 | kfree(hotplug_slot); |
1da177e4 | 164 | error_slot: |
926030f6 | 165 | kfree(slot); |
1da177e4 | 166 | error: |
926030f6 | 167 | return retval; |
1da177e4 LT |
168 | } |
169 | ||
f7391f53 | 170 | void cleanup_slots(struct controller *ctrl) |
1da177e4 | 171 | { |
5b1a960d KK |
172 | struct list_head *tmp; |
173 | struct list_head *next; | |
174 | struct slot *slot; | |
1da177e4 | 175 | |
5b1a960d KK |
176 | list_for_each_safe(tmp, next, &ctrl->slot_list) { |
177 | slot = list_entry(tmp, struct slot, slot_list); | |
178 | list_del(&slot->slot_list); | |
f7391f53 | 179 | cancel_delayed_work(&slot->work); |
a246fa4e | 180 | flush_scheduled_work(); |
f7391f53 | 181 | flush_workqueue(shpchp_wq); |
5b1a960d | 182 | pci_hp_deregister(slot->hotplug_slot); |
1da177e4 LT |
183 | } |
184 | } | |
185 | ||
1da177e4 LT |
186 | /* |
187 | * set_attention_status - Turns the Amber LED for a slot on, off or blink | |
188 | */ | |
189 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
190 | { | |
8352e04e | 191 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 192 | |
be7bce25 | 193 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 194 | __func__, slot_name(slot)); |
1da177e4 LT |
195 | |
196 | hotplug_slot->info->attention_status = status; | |
197 | slot->hpc_ops->set_attention_status(slot, status); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
1da177e4 LT |
202 | static int enable_slot (struct hotplug_slot *hotplug_slot) |
203 | { | |
8352e04e | 204 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 205 | |
be7bce25 | 206 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 207 | __func__, slot_name(slot)); |
1da177e4 | 208 | |
a246fa4e | 209 | return shpchp_sysfs_enable_slot(slot); |
1da177e4 LT |
210 | } |
211 | ||
1da177e4 LT |
212 | static int disable_slot (struct hotplug_slot *hotplug_slot) |
213 | { | |
8352e04e | 214 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 215 | |
be7bce25 | 216 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 217 | __func__, slot_name(slot)); |
1da177e4 | 218 | |
a246fa4e | 219 | return shpchp_sysfs_disable_slot(slot); |
1da177e4 LT |
220 | } |
221 | ||
222 | static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
223 | { | |
8352e04e | 224 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
225 | int retval; |
226 | ||
be7bce25 | 227 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 228 | __func__, slot_name(slot)); |
1da177e4 LT |
229 | |
230 | retval = slot->hpc_ops->get_power_status(slot, value); | |
231 | if (retval < 0) | |
232 | *value = hotplug_slot->info->power_status; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
238 | { | |
8352e04e | 239 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
240 | int retval; |
241 | ||
be7bce25 | 242 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 243 | __func__, slot_name(slot)); |
1da177e4 LT |
244 | |
245 | retval = slot->hpc_ops->get_attention_status(slot, value); | |
246 | if (retval < 0) | |
247 | *value = hotplug_slot->info->attention_status; | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
253 | { | |
8352e04e | 254 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
255 | int retval; |
256 | ||
be7bce25 | 257 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 258 | __func__, slot_name(slot)); |
1da177e4 LT |
259 | |
260 | retval = slot->hpc_ops->get_latch_status(slot, value); | |
261 | if (retval < 0) | |
262 | *value = hotplug_slot->info->latch_status; | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
268 | { | |
8352e04e | 269 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
270 | int retval; |
271 | ||
be7bce25 | 272 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 273 | __func__, slot_name(slot)); |
1da177e4 LT |
274 | |
275 | retval = slot->hpc_ops->get_adapter_status(slot, value); | |
276 | if (retval < 0) | |
277 | *value = hotplug_slot->info->adapter_status; | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
f46753c5 AC |
282 | static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, |
283 | enum pci_bus_speed *value) | |
1da177e4 | 284 | { |
8352e04e | 285 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
286 | int retval; |
287 | ||
be7bce25 | 288 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 289 | __func__, slot_name(slot)); |
dfcd5f68 | 290 | |
1da177e4 LT |
291 | retval = slot->hpc_ops->get_max_bus_speed(slot, value); |
292 | if (retval < 0) | |
293 | *value = PCI_SPEED_UNKNOWN; | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) | |
299 | { | |
8352e04e | 300 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
301 | int retval; |
302 | ||
be7bce25 | 303 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 304 | __func__, slot_name(slot)); |
dfcd5f68 | 305 | |
1da177e4 LT |
306 | retval = slot->hpc_ops->get_cur_bus_speed(slot, value); |
307 | if (retval < 0) | |
308 | *value = PCI_SPEED_UNKNOWN; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
1410dc1c RS |
313 | static int is_shpc_capable(struct pci_dev *dev) |
314 | { | |
ac9c052d KK |
315 | if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == |
316 | PCI_DEVICE_ID_AMD_GOLAM_7450)) | |
317 | return 1; | |
318 | if (!pci_find_capability(dev, PCI_CAP_ID_SHPC)) | |
319 | return 0; | |
320 | if (get_hp_hw_control_from_firmware(dev)) | |
321 | return 0; | |
322 | return 1; | |
1410dc1c RS |
323 | } |
324 | ||
1da177e4 LT |
325 | static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
326 | { | |
327 | int rc; | |
328 | struct controller *ctrl; | |
1da177e4 | 329 | |
1410dc1c RS |
330 | if (!is_shpc_capable(pdev)) |
331 | return -ENODEV; | |
332 | ||
57c95c0d | 333 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
1da177e4 | 334 | if (!ctrl) { |
be7bce25 | 335 | dev_err(&pdev->dev, "%s: Out of memory\n", __func__); |
1da177e4 LT |
336 | goto err_out_none; |
337 | } | |
5b1a960d | 338 | INIT_LIST_HEAD(&ctrl->slot_list); |
1da177e4 | 339 | |
ee138334 | 340 | rc = shpc_init(ctrl, pdev); |
1da177e4 | 341 | if (rc) { |
be7bce25 | 342 | ctrl_dbg(ctrl, "Controller initialization failed\n"); |
1da177e4 LT |
343 | goto err_out_free_ctrl; |
344 | } | |
345 | ||
1da177e4 LT |
346 | pci_set_drvdata(pdev, ctrl); |
347 | ||
1da177e4 LT |
348 | /* Setup the slot information structures */ |
349 | rc = init_slots(ctrl); | |
350 | if (rc) { | |
be7bce25 | 351 | ctrl_err(ctrl, "Slot initialization failed\n"); |
f7391f53 | 352 | goto err_out_release_ctlr; |
1da177e4 LT |
353 | } |
354 | ||
e1b95dc6 GKH |
355 | rc = shpchp_create_ctrl_files(ctrl); |
356 | if (rc) | |
357 | goto err_cleanup_slots; | |
1da177e4 LT |
358 | |
359 | return 0; | |
360 | ||
e1b95dc6 GKH |
361 | err_cleanup_slots: |
362 | cleanup_slots(ctrl); | |
f7391f53 | 363 | err_out_release_ctlr: |
1da177e4 LT |
364 | ctrl->hpc_ops->release_ctlr(ctrl); |
365 | err_out_free_ctrl: | |
366 | kfree(ctrl); | |
367 | err_out_none: | |
368 | return -ENODEV; | |
369 | } | |
370 | ||
e6b82b13 | 371 | static void shpc_remove(struct pci_dev *dev) |
1da177e4 | 372 | { |
e6b82b13 | 373 | struct controller *ctrl = pci_get_drvdata(dev); |
1da177e4 | 374 | |
e6b82b13 KK |
375 | shpchp_remove_ctrl_files(ctrl); |
376 | ctrl->hpc_ops->release_ctlr(ctrl); | |
377 | kfree(ctrl); | |
1da177e4 LT |
378 | } |
379 | ||
1da177e4 | 380 | static struct pci_device_id shpcd_pci_tbl[] = { |
dfcd5f68 | 381 | {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
1da177e4 LT |
382 | { /* end: all zeroes */ } |
383 | }; | |
1da177e4 LT |
384 | MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
385 | ||
1da177e4 LT |
386 | static struct pci_driver shpc_driver = { |
387 | .name = SHPC_MODULE_NAME, | |
388 | .id_table = shpcd_pci_tbl, | |
389 | .probe = shpc_probe, | |
e6b82b13 | 390 | .remove = shpc_remove, |
1da177e4 LT |
391 | }; |
392 | ||
1da177e4 LT |
393 | static int __init shpcd_init(void) |
394 | { | |
395 | int retval = 0; | |
396 | ||
424600f9 | 397 | retval = pci_register_driver(&shpc_driver); |
66bef8c0 | 398 | dbg("%s: pci_register_driver = %d\n", __func__, retval); |
424600f9 | 399 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
1da177e4 LT |
400 | return retval; |
401 | } | |
402 | ||
403 | static void __exit shpcd_cleanup(void) | |
404 | { | |
405 | dbg("unload_shpchpd()\n"); | |
1da177e4 | 406 | pci_unregister_driver(&shpc_driver); |
1da177e4 LT |
407 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
408 | } | |
409 | ||
410 | module_init(shpcd_init); | |
411 | module_exit(shpcd_cleanup); |