Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 | 35 | #include <linux/pci.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; |
e24dcbef | 43 | struct workqueue_struct *shpchp_ordered_wq; |
1da177e4 LT |
44 | |
45 | #define DRIVER_VERSION "0.4" | |
46 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" | |
47 | #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" | |
48 | ||
49 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
50 | MODULE_DESCRIPTION(DRIVER_DESC); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | module_param(shpchp_debug, bool, 0644); | |
54 | module_param(shpchp_poll_mode, bool, 0644); | |
55 | module_param(shpchp_poll_time, int, 0644); | |
56 | MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); | |
57 | MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); | |
58 | MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); | |
59 | ||
60 | #define SHPC_MODULE_NAME "shpchp" | |
61 | ||
1da177e4 LT |
62 | static int set_attention_status (struct hotplug_slot *slot, u8 value); |
63 | static int enable_slot (struct hotplug_slot *slot); | |
64 | static int disable_slot (struct hotplug_slot *slot); | |
65 | static int get_power_status (struct hotplug_slot *slot, u8 *value); | |
66 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); | |
67 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); | |
68 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); | |
1da177e4 LT |
69 | |
70 | static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { | |
1da177e4 LT |
71 | .set_attention_status = set_attention_status, |
72 | .enable_slot = enable_slot, | |
73 | .disable_slot = disable_slot, | |
74 | .get_power_status = get_power_status, | |
75 | .get_attention_status = get_attention_status, | |
76 | .get_latch_status = get_latch_status, | |
77 | .get_adapter_status = get_adapter_status, | |
1da177e4 LT |
78 | }; |
79 | ||
80 | /** | |
81 | * release_slot - free up the memory used by a slot | |
82 | * @hotplug_slot: slot to free | |
83 | */ | |
84 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
85 | { | |
ee17fd93 | 86 | struct slot *slot = hotplug_slot->private; |
1da177e4 | 87 | |
be7bce25 | 88 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 89 | __func__, slot_name(slot)); |
1da177e4 LT |
90 | |
91 | kfree(slot->hotplug_slot->info); | |
1da177e4 LT |
92 | kfree(slot->hotplug_slot); |
93 | kfree(slot); | |
94 | } | |
95 | ||
96 | static int init_slots(struct controller *ctrl) | |
97 | { | |
926030f6 KK |
98 | struct slot *slot; |
99 | struct hotplug_slot *hotplug_slot; | |
100 | struct hotplug_slot_info *info; | |
66f17055 | 101 | char name[SLOT_NAME_SIZE]; |
926030f6 | 102 | int retval = -ENOMEM; |
5fe6cc60 | 103 | int i; |
926030f6 KK |
104 | |
105 | for (i = 0; i < ctrl->num_slots; i++) { | |
57c95c0d | 106 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
926030f6 | 107 | if (!slot) |
1da177e4 LT |
108 | goto error; |
109 | ||
57c95c0d | 110 | hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); |
926030f6 | 111 | if (!hotplug_slot) |
1da177e4 | 112 | goto error_slot; |
926030f6 | 113 | slot->hotplug_slot = hotplug_slot; |
1da177e4 | 114 | |
57c95c0d | 115 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
926030f6 | 116 | if (!info) |
1da177e4 | 117 | goto error_hpslot; |
926030f6 KK |
118 | hotplug_slot->info = info; |
119 | ||
926030f6 | 120 | slot->hp_slot = i; |
926030f6 | 121 | slot->ctrl = ctrl; |
227b84c7 | 122 | slot->bus = ctrl->pci_dev->subordinate->number; |
926030f6 KK |
123 | slot->device = ctrl->slot_device_offset + i; |
124 | slot->hpc_ops = ctrl->hpc_ops; | |
6f39be2e | 125 | slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); |
a246fa4e | 126 | mutex_init(&slot->lock); |
e325e1f0 | 127 | INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); |
1da177e4 LT |
128 | |
129 | /* register this slot with the hotplug pci core */ | |
926030f6 KK |
130 | hotplug_slot->private = slot; |
131 | hotplug_slot->release = &release_slot; | |
66f17055 | 132 | snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); |
926030f6 KK |
133 | hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
134 | ||
be7bce25 TI |
135 | ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x " |
136 | "hp_slot=%x sun=%x slot_device_offset=%x\n", | |
137 | pci_domain_nr(ctrl->pci_dev->subordinate), | |
138 | slot->bus, slot->device, slot->hp_slot, slot->number, | |
139 | ctrl->slot_device_offset); | |
f46753c5 | 140 | retval = pci_hp_register(slot->hotplug_slot, |
66f17055 | 141 | ctrl->pci_dev->subordinate, slot->device, name); |
926030f6 | 142 | if (retval) { |
f98ca311 TI |
143 | ctrl_err(ctrl, "pci_hp_register failed with error %d\n", |
144 | retval); | |
bbe779db | 145 | goto error_info; |
1da177e4 LT |
146 | } |
147 | ||
66f17055 AC |
148 | get_power_status(hotplug_slot, &info->power_status); |
149 | get_attention_status(hotplug_slot, &info->attention_status); | |
150 | get_latch_status(hotplug_slot, &info->latch_status); | |
151 | get_adapter_status(hotplug_slot, &info->adapter_status); | |
152 | ||
5b1a960d | 153 | list_add(&slot->slot_list, &ctrl->slot_list); |
1da177e4 LT |
154 | } |
155 | ||
156 | return 0; | |
1da177e4 | 157 | error_info: |
926030f6 | 158 | kfree(info); |
1da177e4 | 159 | error_hpslot: |
926030f6 | 160 | kfree(hotplug_slot); |
1da177e4 | 161 | error_slot: |
926030f6 | 162 | kfree(slot); |
1da177e4 | 163 | error: |
926030f6 | 164 | return retval; |
1da177e4 LT |
165 | } |
166 | ||
f7391f53 | 167 | void cleanup_slots(struct controller *ctrl) |
1da177e4 | 168 | { |
5b1a960d KK |
169 | struct list_head *tmp; |
170 | struct list_head *next; | |
171 | struct slot *slot; | |
1da177e4 | 172 | |
5b1a960d KK |
173 | list_for_each_safe(tmp, next, &ctrl->slot_list) { |
174 | slot = list_entry(tmp, struct slot, slot_list); | |
175 | list_del(&slot->slot_list); | |
f7391f53 KK |
176 | cancel_delayed_work(&slot->work); |
177 | flush_workqueue(shpchp_wq); | |
e24dcbef | 178 | flush_workqueue(shpchp_ordered_wq); |
5b1a960d | 179 | pci_hp_deregister(slot->hotplug_slot); |
1da177e4 LT |
180 | } |
181 | } | |
182 | ||
1da177e4 LT |
183 | /* |
184 | * set_attention_status - Turns the Amber LED for a slot on, off or blink | |
185 | */ | |
186 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
187 | { | |
8352e04e | 188 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 189 | |
be7bce25 | 190 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 191 | __func__, slot_name(slot)); |
1da177e4 LT |
192 | |
193 | hotplug_slot->info->attention_status = status; | |
194 | slot->hpc_ops->set_attention_status(slot, status); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
1da177e4 LT |
199 | static int enable_slot (struct hotplug_slot *hotplug_slot) |
200 | { | |
8352e04e | 201 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 202 | |
be7bce25 | 203 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 204 | __func__, slot_name(slot)); |
1da177e4 | 205 | |
a246fa4e | 206 | return shpchp_sysfs_enable_slot(slot); |
1da177e4 LT |
207 | } |
208 | ||
1da177e4 LT |
209 | static int disable_slot (struct hotplug_slot *hotplug_slot) |
210 | { | |
8352e04e | 211 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 212 | |
be7bce25 | 213 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 214 | __func__, slot_name(slot)); |
1da177e4 | 215 | |
a246fa4e | 216 | return shpchp_sysfs_disable_slot(slot); |
1da177e4 LT |
217 | } |
218 | ||
219 | static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
220 | { | |
8352e04e | 221 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
222 | int retval; |
223 | ||
be7bce25 | 224 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 225 | __func__, slot_name(slot)); |
1da177e4 LT |
226 | |
227 | retval = slot->hpc_ops->get_power_status(slot, value); | |
228 | if (retval < 0) | |
229 | *value = hotplug_slot->info->power_status; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
235 | { | |
8352e04e | 236 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
237 | int retval; |
238 | ||
be7bce25 | 239 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 240 | __func__, slot_name(slot)); |
1da177e4 LT |
241 | |
242 | retval = slot->hpc_ops->get_attention_status(slot, value); | |
243 | if (retval < 0) | |
244 | *value = hotplug_slot->info->attention_status; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
250 | { | |
8352e04e | 251 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
252 | int retval; |
253 | ||
be7bce25 | 254 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 255 | __func__, slot_name(slot)); |
1da177e4 LT |
256 | |
257 | retval = slot->hpc_ops->get_latch_status(slot, value); | |
258 | if (retval < 0) | |
259 | *value = hotplug_slot->info->latch_status; | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
265 | { | |
8352e04e | 266 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
267 | int retval; |
268 | ||
be7bce25 | 269 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 270 | __func__, slot_name(slot)); |
1da177e4 LT |
271 | |
272 | retval = slot->hpc_ops->get_adapter_status(slot, value); | |
273 | if (retval < 0) | |
274 | *value = hotplug_slot->info->adapter_status; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
1410dc1c | 279 | static int is_shpc_capable(struct pci_dev *dev) |
280 | { | |
ac9c052d KK |
281 | if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == |
282 | PCI_DEVICE_ID_AMD_GOLAM_7450)) | |
283 | return 1; | |
284 | if (!pci_find_capability(dev, PCI_CAP_ID_SHPC)) | |
285 | return 0; | |
286 | if (get_hp_hw_control_from_firmware(dev)) | |
287 | return 0; | |
288 | return 1; | |
1410dc1c | 289 | } |
290 | ||
1da177e4 LT |
291 | static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
292 | { | |
293 | int rc; | |
294 | struct controller *ctrl; | |
1da177e4 | 295 | |
1410dc1c | 296 | if (!is_shpc_capable(pdev)) |
297 | return -ENODEV; | |
298 | ||
57c95c0d | 299 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
1da177e4 | 300 | if (!ctrl) { |
be7bce25 | 301 | dev_err(&pdev->dev, "%s: Out of memory\n", __func__); |
1da177e4 LT |
302 | goto err_out_none; |
303 | } | |
5b1a960d | 304 | INIT_LIST_HEAD(&ctrl->slot_list); |
1da177e4 | 305 | |
ee138334 | 306 | rc = shpc_init(ctrl, pdev); |
1da177e4 | 307 | if (rc) { |
be7bce25 | 308 | ctrl_dbg(ctrl, "Controller initialization failed\n"); |
1da177e4 LT |
309 | goto err_out_free_ctrl; |
310 | } | |
311 | ||
1da177e4 LT |
312 | pci_set_drvdata(pdev, ctrl); |
313 | ||
1da177e4 LT |
314 | /* Setup the slot information structures */ |
315 | rc = init_slots(ctrl); | |
316 | if (rc) { | |
be7bce25 | 317 | ctrl_err(ctrl, "Slot initialization failed\n"); |
f7391f53 | 318 | goto err_out_release_ctlr; |
1da177e4 LT |
319 | } |
320 | ||
e1b95dc6 GKH |
321 | rc = shpchp_create_ctrl_files(ctrl); |
322 | if (rc) | |
323 | goto err_cleanup_slots; | |
1da177e4 LT |
324 | |
325 | return 0; | |
326 | ||
e1b95dc6 GKH |
327 | err_cleanup_slots: |
328 | cleanup_slots(ctrl); | |
f7391f53 | 329 | err_out_release_ctlr: |
1da177e4 LT |
330 | ctrl->hpc_ops->release_ctlr(ctrl); |
331 | err_out_free_ctrl: | |
332 | kfree(ctrl); | |
333 | err_out_none: | |
334 | return -ENODEV; | |
335 | } | |
336 | ||
e6b82b13 | 337 | static void shpc_remove(struct pci_dev *dev) |
1da177e4 | 338 | { |
e6b82b13 | 339 | struct controller *ctrl = pci_get_drvdata(dev); |
1da177e4 | 340 | |
e6b82b13 KK |
341 | shpchp_remove_ctrl_files(ctrl); |
342 | ctrl->hpc_ops->release_ctlr(ctrl); | |
343 | kfree(ctrl); | |
1da177e4 LT |
344 | } |
345 | ||
1da177e4 | 346 | static struct pci_device_id shpcd_pci_tbl[] = { |
dfcd5f68 | 347 | {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
1da177e4 LT |
348 | { /* end: all zeroes */ } |
349 | }; | |
1da177e4 LT |
350 | MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
351 | ||
1da177e4 LT |
352 | static struct pci_driver shpc_driver = { |
353 | .name = SHPC_MODULE_NAME, | |
354 | .id_table = shpcd_pci_tbl, | |
355 | .probe = shpc_probe, | |
e6b82b13 | 356 | .remove = shpc_remove, |
1da177e4 LT |
357 | }; |
358 | ||
1da177e4 LT |
359 | static int __init shpcd_init(void) |
360 | { | |
361 | int retval = 0; | |
362 | ||
e24dcbef TH |
363 | shpchp_wq = alloc_ordered_workqueue("shpchp", 0); |
364 | if (!shpchp_wq) | |
365 | return -ENOMEM; | |
366 | ||
367 | shpchp_ordered_wq = alloc_ordered_workqueue("shpchp_ordered", 0); | |
368 | if (!shpchp_ordered_wq) { | |
369 | destroy_workqueue(shpchp_wq); | |
370 | return -ENOMEM; | |
371 | } | |
372 | ||
424600f9 | 373 | retval = pci_register_driver(&shpc_driver); |
66bef8c0 | 374 | dbg("%s: pci_register_driver = %d\n", __func__, retval); |
424600f9 | 375 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
e24dcbef TH |
376 | if (retval) { |
377 | destroy_workqueue(shpchp_ordered_wq); | |
378 | destroy_workqueue(shpchp_wq); | |
379 | } | |
1da177e4 LT |
380 | return retval; |
381 | } | |
382 | ||
383 | static void __exit shpcd_cleanup(void) | |
384 | { | |
385 | dbg("unload_shpchpd()\n"); | |
1da177e4 | 386 | pci_unregister_driver(&shpc_driver); |
e24dcbef TH |
387 | destroy_workqueue(shpchp_ordered_wq); |
388 | destroy_workqueue(shpchp_wq); | |
1da177e4 LT |
389 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
390 | } | |
391 | ||
392 | module_init(shpcd_init); | |
393 | module_exit(shpcd_cleanup); |