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30#include <linux/module.h>
31#include <linux/moduleparam.h>
32#include <linux/kernel.h>
33#include <linux/types.h>
34#include <linux/slab.h>
35#include <linux/pci.h>
36#include "shpchp.h"
37
38
39int shpchp_debug;
40int shpchp_poll_mode;
41int shpchp_poll_time;
42struct workqueue_struct *shpchp_wq;
43struct workqueue_struct *shpchp_ordered_wq;
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
49MODULE_AUTHOR(DRIVER_AUTHOR);
50MODULE_DESCRIPTION(DRIVER_DESC);
51MODULE_LICENSE("GPL");
52
53module_param(shpchp_debug, bool, 0644);
54module_param(shpchp_poll_mode, bool, 0644);
55module_param(shpchp_poll_time, int, 0644);
56MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
57MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
58MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
59
60#define SHPC_MODULE_NAME "shpchp"
61
62static int set_attention_status (struct hotplug_slot *slot, u8 value);
63static int enable_slot (struct hotplug_slot *slot);
64static int disable_slot (struct hotplug_slot *slot);
65static int get_power_status (struct hotplug_slot *slot, u8 *value);
66static int get_attention_status (struct hotplug_slot *slot, u8 *value);
67static int get_latch_status (struct hotplug_slot *slot, u8 *value);
68static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
69
70static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
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,
78};
79
80
81
82
83
84static void release_slot(struct hotplug_slot *hotplug_slot)
85{
86 struct slot *slot = hotplug_slot->private;
87
88 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
89 __func__, slot_name(slot));
90
91 kfree(slot->hotplug_slot->info);
92 kfree(slot->hotplug_slot);
93 kfree(slot);
94}
95
96static int init_slots(struct controller *ctrl)
97{
98 struct slot *slot;
99 struct hotplug_slot *hotplug_slot;
100 struct hotplug_slot_info *info;
101 char name[SLOT_NAME_SIZE];
102 int retval = -ENOMEM;
103 int i;
104
105 for (i = 0; i < ctrl->num_slots; i++) {
106 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
107 if (!slot)
108 goto error;
109
110 hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
111 if (!hotplug_slot)
112 goto error_slot;
113 slot->hotplug_slot = hotplug_slot;
114
115 info = kzalloc(sizeof(*info), GFP_KERNEL);
116 if (!info)
117 goto error_hpslot;
118 hotplug_slot->info = info;
119
120 slot->hp_slot = i;
121 slot->ctrl = ctrl;
122 slot->bus = ctrl->pci_dev->subordinate->number;
123 slot->device = ctrl->slot_device_offset + i;
124 slot->hpc_ops = ctrl->hpc_ops;
125 slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
126 mutex_init(&slot->lock);
127 INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
128
129
130 hotplug_slot->private = slot;
131 hotplug_slot->release = &release_slot;
132 snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
133 hotplug_slot->ops = &shpchp_hotplug_slot_ops;
134
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);
140 retval = pci_hp_register(slot->hotplug_slot,
141 ctrl->pci_dev->subordinate, slot->device, name);
142 if (retval) {
143 ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
144 retval);
145 goto error_info;
146 }
147
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
153 list_add(&slot->slot_list, &ctrl->slot_list);
154 }
155
156 return 0;
157error_info:
158 kfree(info);
159error_hpslot:
160 kfree(hotplug_slot);
161error_slot:
162 kfree(slot);
163error:
164 return retval;
165}
166
167void cleanup_slots(struct controller *ctrl)
168{
169 struct list_head *tmp;
170 struct list_head *next;
171 struct slot *slot;
172
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);
176 cancel_delayed_work(&slot->work);
177 flush_workqueue(shpchp_wq);
178 flush_workqueue(shpchp_ordered_wq);
179 pci_hp_deregister(slot->hotplug_slot);
180 }
181}
182
183
184
185
186static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
187{
188 struct slot *slot = get_slot(hotplug_slot);
189
190 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
191 __func__, slot_name(slot));
192
193 hotplug_slot->info->attention_status = status;
194 slot->hpc_ops->set_attention_status(slot, status);
195
196 return 0;
197}
198
199static int enable_slot (struct hotplug_slot *hotplug_slot)
200{
201 struct slot *slot = get_slot(hotplug_slot);
202
203 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
204 __func__, slot_name(slot));
205
206 return shpchp_sysfs_enable_slot(slot);
207}
208
209static int disable_slot (struct hotplug_slot *hotplug_slot)
210{
211 struct slot *slot = get_slot(hotplug_slot);
212
213 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
214 __func__, slot_name(slot));
215
216 return shpchp_sysfs_disable_slot(slot);
217}
218
219static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
220{
221 struct slot *slot = get_slot(hotplug_slot);
222 int retval;
223
224 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
225 __func__, slot_name(slot));
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
234static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
235{
236 struct slot *slot = get_slot(hotplug_slot);
237 int retval;
238
239 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
240 __func__, slot_name(slot));
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
249static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
250{
251 struct slot *slot = get_slot(hotplug_slot);
252 int retval;
253
254 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
255 __func__, slot_name(slot));
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
264static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)
265{
266 struct slot *slot = get_slot(hotplug_slot);
267 int retval;
268
269 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
270 __func__, slot_name(slot));
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
279static int is_shpc_capable(struct pci_dev *dev)
280{
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;
289}
290
291static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
292{
293 int rc;
294 struct controller *ctrl;
295
296 if (!is_shpc_capable(pdev))
297 return -ENODEV;
298
299 ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
300 if (!ctrl) {
301 dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
302 goto err_out_none;
303 }
304 INIT_LIST_HEAD(&ctrl->slot_list);
305
306 rc = shpc_init(ctrl, pdev);
307 if (rc) {
308 ctrl_dbg(ctrl, "Controller initialization failed\n");
309 goto err_out_free_ctrl;
310 }
311
312 pci_set_drvdata(pdev, ctrl);
313
314
315 rc = init_slots(ctrl);
316 if (rc) {
317 ctrl_err(ctrl, "Slot initialization failed\n");
318 goto err_out_release_ctlr;
319 }
320
321 rc = shpchp_create_ctrl_files(ctrl);
322 if (rc)
323 goto err_cleanup_slots;
324
325 return 0;
326
327err_cleanup_slots:
328 cleanup_slots(ctrl);
329err_out_release_ctlr:
330 ctrl->hpc_ops->release_ctlr(ctrl);
331err_out_free_ctrl:
332 kfree(ctrl);
333err_out_none:
334 return -ENODEV;
335}
336
337static void shpc_remove(struct pci_dev *dev)
338{
339 struct controller *ctrl = pci_get_drvdata(dev);
340
341 shpchp_remove_ctrl_files(ctrl);
342 ctrl->hpc_ops->release_ctlr(ctrl);
343 kfree(ctrl);
344}
345
346static struct pci_device_id shpcd_pci_tbl[] = {
347 {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)},
348 { }
349};
350MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
351
352static struct pci_driver shpc_driver = {
353 .name = SHPC_MODULE_NAME,
354 .id_table = shpcd_pci_tbl,
355 .probe = shpc_probe,
356 .remove = shpc_remove,
357};
358
359static int __init shpcd_init(void)
360{
361 int retval = 0;
362
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
373 retval = pci_register_driver(&shpc_driver);
374 dbg("%s: pci_register_driver = %d\n", __func__, retval);
375 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
376 if (retval) {
377 destroy_workqueue(shpchp_ordered_wq);
378 destroy_workqueue(shpchp_wq);
379 }
380 return retval;
381}
382
383static void __exit shpcd_cleanup(void)
384{
385 dbg("unload_shpchpd()\n");
386 pci_unregister_driver(&shpc_driver);
387 destroy_workqueue(shpchp_ordered_wq);
388 destroy_workqueue(shpchp_wq);
389 info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
390}
391
392module_init(shpcd_init);
393module_exit(shpcd_cleanup);
394
